Merge branch 'refactor/visibility'

crates/migration/src/lib.rs

@@ -2,6 +2,7 @@ pub use sea_orm_migration::prelude::*;
 
 mod m20260526_062833_create_account_table;
 mod m20260526_110957_create_transcations_table;
+mod m20260528_110733_create_cache_table;
 
 pub struct Migrator;
 
@@ -11,6 +12,7 @@ impl MigratorTrait for Migrator {
         vec![
             Box::new(m20260526_062833_create_account_table::Migration),
             Box::new(m20260526_110957_create_transcations_table::Migration),
+            Box::new(m20260528_110733_create_cache_table::Migration),
         ]
     }
 }

crates/migration/src/m20260528_110733_create_cache_table.rs

@@ -0,0 +1,61 @@
+use sea_orm_migration::{prelude::*, schema::*};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table("cache")
+                    .comment("2 level cache for general use")
+                    .if_not_exists()
+                    .col(string("category").not_null().comment("Cache category"))
+                    .col(string("key").not_null().comment("Cache key"))
+                    .col(string("value").not_null().comment("Cache value"))
+                    .col(
+                        boolean("is_invalidated")
+                            .not_null()
+                            .comment("Whether the cache is manually invalidated"),
+                    )
+                    .col(string("expire_at").null().comment("Expiration time"))
+                    .col(string("created_at").not_null().comment("Creation time"))
+                    .col(string("updated_at").not_null().comment("Last update time"))
+                    //
+                    .primary_key(Index::create().col("category").col("key"))
+                    //
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_cache_category")
+                    .table("cache")
+                    .col("category")
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_cache_expire_at")
+                    .table("cache")
+                    .col("expire_at")
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table("cache").to_owned())
+            .await
+    }
+}

src-tauri/src/commands/account.rs

@@ -0,0 +1,34 @@
+#[tauri::command]
+pub async fn get_account(
+    id: i64,
+    services: tauri::State<'_, crate::services::AppState>,
+) -> Result<Option<crate::services::accounts::Account>, String> {
+    let accounts_service = &services.accounts;
+    accounts_service
+        .get_account(&id)
+        .await
+        .map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+pub async fn get_accounts(
+    services: tauri::State<'_, crate::services::AppState>,
+) -> Result<Vec<crate::services::accounts::Account>, String> {
+    let accounts_service = &services.accounts;
+    accounts_service
+        .get_accounts()
+        .await
+        .map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+pub async fn create_account(
+    request: crate::services::accounts::CreateAccountRequest,
+    services: tauri::State<'_, crate::services::AppState>,
+) -> Result<i64, String> {
+    let accounts_service = &services.accounts;
+    accounts_service
+        .create_account(request)
+        .await
+        .map_err(|e| e.to_string())
+}

src-tauri/src/commands/mod.rs

@@ -0,0 +1,5 @@
+mod account;
+mod transactions;
+
+pub use account::*;
+pub use transactions::*;

src-tauri/src/commands/transactions.rs

@@ -0,0 +1,36 @@
+#[tauri::command]
+pub async fn get_transactions_for_account(
+    id: i64,
+    services: tauri::State<'_, crate::services::AppState>,
+) -> Result<Vec<crate::services::transaction::Transaction>, String> {
+    let transaction_service = &services.transaction;
+    transaction_service
+        .get_transactions_by_account(id)
+        .await
+        .map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+pub async fn create_transaction(
+    request: crate::services::transaction::CreateTransactionRequest,
+    services: tauri::State<'_, crate::services::AppState>,
+) -> Result<i64, String> {
+    let transaction_service = &services.transaction;
+    transaction_service
+        .create_transaction(request)
+        .await
+        .map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+pub async fn update_transaction(
+    id: i64,
+    request: crate::services::transaction::UpdateTransactionRequest,
+    services: tauri::State<'_, crate::services::AppState>,
+) -> Result<(), String> {
+    let transaction_service = &services.transaction;
+    transaction_service
+        .update_transaction(id, request)
+        .await
+        .map_err(|e| e.to_string())
+}

src-tauri/src/db/entities/cache.rs

@@ -0,0 +1,24 @@
+//! `SeaORM` Entity, @generated by sea-orm-codegen 2.0
+
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "cache")]
+#[allow(dead_code)]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub category: String,
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub key: String,
+    pub value: String,
+    pub is_invalidated: bool,
+    pub expire_at: Option<String>,
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

src-tauri/src/db/entities/mod.rs

@@ -4,6 +4,7 @@ pub mod prelude;
 
 pub mod account;
 pub mod account_category;
+pub mod cache;
 pub mod category;
 pub mod tag;
 pub mod transaction;

src-tauri/src/db/entities/prelude.rs

@@ -4,6 +4,7 @@
 
 pub use super::account::Entity as Account;
 pub use super::account_category::Entity as AccountCategory;
+pub use super::cache::Entity as Cache;
 pub use super::category::Entity as Category;
 pub use super::tag::Entity as Tag;
 pub use super::transaction::Entity as Transaction;

src-tauri/src/services/accounts/category.rs

@@ -1,217 +0,0 @@
-// TODO: validation for all dto
-use crate::db::{
-    Db,
-    entities::account_category::{
-        ActiveModel as AccountCategoryActiveModel, Entity as AccountCategoryEntity,
-    },
-};
-use migration::OnConflict;
-use sea_orm::{
-    ActiveModelTrait, ActiveValue::Set, ColumnTrait, DatabaseConnection, EntityTrait,
-    IntoActiveModel, ModelTrait, PaginatorTrait, QueryFilter,
-};
-use serde::{Deserialize, Serialize};
-
-pub struct AccountCategory {
-    pub id: i64,
-    pub name: String,
-    pub account_type: AccountType,
-    //
-    pub created_at: String,
-    pub updated_at: String,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub enum AccountType {
-    #[serde(rename = "Asset")]
-    Asset, // Positive balance, e.g. Checking, Savings
-    #[serde(rename = "Liability")]
-    Liability, // Negative balance, e.g. Credit Card
-    #[serde(other, rename = "Unknown")]
-    Unknown, // Fallback for unknown types
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct CreateAccountCategoryRequest {
-    pub name: String,
-    pub account_type: AccountType,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct UpdateAccountCategoryRequest {
-    pub name: Option<String>,
-    pub account_type: Option<AccountType>,
-}
-
-impl From<String> for AccountType {
-    fn from(s: String) -> Self {
-        match s.as_str() {
-            "Asset" => AccountType::Asset,
-            "Liability" => AccountType::Liability,
-            _ => AccountType::Unknown,
-        }
-    }
-}
-
-impl std::fmt::Display for AccountType {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            AccountType::Asset => write!(f, "Asset"),
-            AccountType::Liability => write!(f, "Liability"),
-            AccountType::Unknown => write!(f, "Unknown"),
-        }
-    }
-}
-
-#[async_trait::async_trait]
-pub trait AccountCategoryService: Send + Sync + 'static {
-    async fn get_categories(&self) -> Result<Vec<AccountCategory>, String>;
-    async fn create_category(
-        &self,
-        create_request: CreateAccountCategoryRequest,
-    ) -> Result<i64, String>;
-
-    async fn create_category_with_tx(
-        &self,
-        create_request: CreateAccountCategoryRequest,
-        tx: &Db,
-    ) -> Result<i64, String>;
-
-    async fn update_category(
-        &self,
-        id: &i64,
-        update_request: UpdateAccountCategoryRequest,
-    ) -> Result<(), String>;
-
-    async fn update_category_with_tx(
-        &self,
-        id: &i64,
-        update_request: UpdateAccountCategoryRequest,
-        tx: &Db,
-    ) -> Result<(), String>;
-
-    async fn delete_category(&self, id: &i64) -> Result<(), String>;
-}
-
-pub struct AccountCategoryServiceImpl {
-    db: DatabaseConnection,
-}
-
-impl AccountCategoryServiceImpl {
-    pub fn new(db: DatabaseConnection) -> Self {
-        Self { db }
-    }
-}
-
-#[async_trait::async_trait]
-impl AccountCategoryService for AccountCategoryServiceImpl {
-    async fn get_categories(&self) -> Result<Vec<AccountCategory>, String> {
-        let categories = AccountCategoryEntity::find()
-            .all(&self.db)
-            .await
-            .map_err(|e| e.to_string())?;
-        Ok(categories
-            .into_iter()
-            .map(|model| AccountCategory {
-                id: model.id,
-                name: model.name,
-                account_type: AccountType::from(model.account_type),
-                created_at: model.created_at,
-                updated_at: model.updated_at,
-            })
-            .collect())
-    }
-
-    async fn create_category(
-        &self,
-        create_request: CreateAccountCategoryRequest,
-    ) -> Result<i64, String> {
-        self.create_category_with_tx(create_request, &(&self.db).into())
-            .await
-    }
-
-    async fn create_category_with_tx(
-        &self,
-        create_request: CreateAccountCategoryRequest,
-        tx: &Db,
-    ) -> Result<i64, String> {
-        let new_category = AccountCategoryActiveModel {
-            name: Set(create_request.name),
-            account_type: Set(create_request.account_type.to_string()),
-            created_at: Set(chrono::Utc::now().to_rfc3339()),
-            updated_at: Set(chrono::Utc::now().to_rfc3339()),
-            ..Default::default()
-        };
-        let res = AccountCategoryEntity::insert(new_category)
-            .on_conflict(
-                // force update to ensure a record is returned
-                OnConflict::column(crate::db::entities::account_category::Column::Name)
-                    .update_column(crate::db::entities::account_category::Column::Name)
-                    .to_owned(),
-            )
-            .exec_with_returning(tx)
-            .await
-            .map_err(|e| e.to_string())?;
-        Ok(res.id)
-    }
-
-    async fn delete_category(&self, id: &i64) -> Result<(), String> {
-        // check if any accounts are using this category before deleting
-        let accounts_using_category = crate::db::entities::account::Entity::find()
-            .filter(crate::db::entities::account::Column::AccountCategoryId.eq(*id))
-            .count(&self.db)
-            .await
-            .map_err(|e| e.to_string())?;
-
-        if accounts_using_category > 0 {
-            return Err("Cannot delete category that is in use by accounts".to_string());
-        }
-
-        let category = AccountCategoryEntity::find_by_id(*id)
-            .one(&self.db)
-            .await
-            .map_err(|e| e.to_string())?;
-        if let Some(category) = category {
-            category.delete(&self.db).await.map_err(|e| e.to_string())?;
-            Ok(())
-        } else {
-            Err("Category not found".to_string())
-        }
-    }
-
-    async fn update_category(
-        &self,
-        id: &i64,
-        update_request: UpdateAccountCategoryRequest,
-    ) -> Result<(), String> {
-        self.update_category_with_tx(id, update_request, &(&self.db).into())
-            .await
-    }
-
-    async fn update_category_with_tx(
-        &self,
-        id: &i64,
-        update_request: UpdateAccountCategoryRequest,
-        tx: &Db,
-    ) -> Result<(), String> {
-        let category = AccountCategoryEntity::find_by_id(*id)
-            .one(&self.db)
-            .await
-            .map_err(|e| e.to_string())
-            .map(|opt| opt.map(|model| model.into_active_model()))?;
-
-        if let Some(mut category) = category {
-            if let Some(name) = update_request.name {
-                category.name = Set(name);
-            }
-            if let Some(account_type) = update_request.account_type {
-                category.account_type = Set(account_type.to_string());
-            }
-            category.updated_at = Set(chrono::Utc::now().to_rfc3339());
-            category.update(tx).await.map_err(|e| e.to_string())?;
-            Ok(())
-        } else {
-            Err("Category not found".to_string())
-        }
-    }
-}

src-tauri/src/services/accounts/category/dto.rs

@@ -0,0 +1,141 @@
+use sea_orm::ActiveValue::Set;
+use serde::{Deserialize, Serialize};
+
+use crate::db::{
+    DbServiceError,
+    entities::account_category::{
+        ActiveModel as AccountCategoryActiveModel, Model as AccountCategoryModel,
+    },
+};
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum AccountCategoryServiceError {
+    #[error("database error: {0}")]
+    DbErr(#[from] DbServiceError),
+    #[error("Target not found: {0}")]
+    TargetNotFound(String),
+    #[error("Validation error: {0}")]
+    Validation(String),
+    #[error("unknown error: {0}")]
+    Unknown(String),
+}
+
+impl From<sea_orm::DbErr> for AccountCategoryServiceError {
+    fn from(err: sea_orm::DbErr) -> Self {
+        AccountCategoryServiceError::DbErr(DbServiceError::from(err))
+    }
+}
+
+pub struct AccountCategory {
+    pub id: i64,
+    pub name: String,
+    pub account_type: AccountType,
+    //
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+impl From<AccountCategoryModel> for AccountCategory {
+    fn from(model: AccountCategoryModel) -> Self {
+        Self {
+            id: model.id,
+            name: model.name,
+            account_type: AccountType::from(model.account_type),
+            created_at: model.created_at,
+            updated_at: model.updated_at,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum AccountType {
+    #[serde(rename = "Asset")]
+    Asset, // Positive balance, e.g. Checking, Savings
+    #[serde(rename = "Liability")]
+    Liability, // Negative balance, e.g. Credit Card
+    #[serde(other, rename = "Unknown")]
+    Unknown, // Fallback for unknown types
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CreateAccountCategoryRequest {
+    pub name: String,
+    pub account_type: AccountType,
+}
+
+impl CreateAccountCategoryRequest {
+    pub fn validate(&self) -> Result<(), AccountCategoryServiceError> {
+        if self.name.trim().is_empty() {
+            return Err(AccountCategoryServiceError::Validation(
+                "Name cannot be empty".to_string(),
+            ));
+        }
+        if let AccountType::Unknown = self.account_type {
+            return Err(AccountCategoryServiceError::Validation(
+                "Invalid account type".to_string(),
+            ));
+        }
+        Ok(())
+    }
+}
+
+impl From<CreateAccountCategoryRequest> for AccountCategoryActiveModel {
+    fn from(request: CreateAccountCategoryRequest) -> Self {
+        AccountCategoryActiveModel {
+            name: Set(request.name),
+            account_type: Set(request.account_type.to_string()),
+            created_at: Set(chrono::Utc::now().to_rfc3339()),
+            updated_at: Set(chrono::Utc::now().to_rfc3339()),
+            ..Default::default()
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UpdateAccountCategoryRequest {
+    pub name: Option<String>,
+    pub account_type: Option<AccountType>,
+}
+
+impl UpdateAccountCategoryRequest {
+    pub fn validate(&self) -> Result<(), AccountCategoryServiceError> {
+        if let Some(name) = &self.name {
+            if name.trim().is_empty() {
+                return Err(AccountCategoryServiceError::Validation(
+                    "Name cannot be empty".to_string(),
+                ));
+            }
+        }
+        Ok(())
+    }
+
+    pub fn apply_to(self, transaction: &mut AccountCategoryActiveModel) {
+        if let Some(name) = self.name {
+            transaction.name = Set(name);
+        }
+        if let Some(account_type) = self.account_type {
+            transaction.account_type = Set(account_type.to_string());
+        }
+    }
+}
+
+impl From<String> for AccountType {
+    fn from(s: String) -> Self {
+        match s.as_str() {
+            "Asset" => AccountType::Asset,
+            "Liability" => AccountType::Liability,
+            _ => AccountType::Unknown,
+        }
+    }
+}
+
+impl std::fmt::Display for AccountType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            AccountType::Asset => write!(f, "Asset"),
+            AccountType::Liability => write!(f, "Liability"),
+            AccountType::Unknown => write!(f, "Unknown"),
+        }
+    }
+}

src-tauri/src/services/accounts/category/mod.rs

@@ -0,0 +1,6 @@
+mod dto;
+mod repo;
+mod service;
+
+pub use dto::*;
+pub use service::*;

src-tauri/src/services/accounts/category/repo.rs

@@ -0,0 +1,151 @@
+use crate::{
+    db::{
+        Db,
+        entities::account_category::{
+            ActiveModel as AccountCategoryActiveModel, Entity as AccountCategoryEntity,
+        },
+    },
+    services::accounts::category::dto::{
+        AccountCategory, AccountCategoryServiceError, CreateAccountCategoryRequest,
+        UpdateAccountCategoryRequest,
+    },
+};
+use migration::OnConflict;
+use sea_orm::{
+    ActiveModelTrait, ActiveValue::Set, ColumnTrait, DatabaseConnection, EntityTrait,
+    IntoActiveModel, ModelTrait, PaginatorTrait, QueryFilter,
+};
+
+#[async_trait::async_trait]
+pub trait AccountCategoryRepoService: Send + Sync + 'static {
+    async fn get_categories(&self) -> Result<Vec<AccountCategory>, AccountCategoryServiceError>;
+    async fn create_category(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+    ) -> Result<i64, AccountCategoryServiceError>;
+
+    async fn create_category_with_tx(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<i64, AccountCategoryServiceError>;
+
+    async fn update_category(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+    ) -> Result<(), AccountCategoryServiceError>;
+
+    async fn update_category_with_tx(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<(), AccountCategoryServiceError>;
+
+    async fn delete_category(&self, id: &i64) -> Result<(), AccountCategoryServiceError>;
+}
+
+pub struct AccountCategoryRepoServiceImpl {
+    db: DatabaseConnection,
+}
+
+impl AccountCategoryRepoServiceImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
+}
+
+#[async_trait::async_trait]
+impl AccountCategoryRepoService for AccountCategoryRepoServiceImpl {
+    async fn get_categories(&self) -> Result<Vec<AccountCategory>, AccountCategoryServiceError> {
+        let categories = AccountCategoryEntity::find().all(&self.db).await?;
+        Ok(categories.into_iter().map(|model| model.into()).collect())
+    }
+
+    async fn create_category(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+    ) -> Result<i64, AccountCategoryServiceError> {
+        self.create_category_with_tx(create_request, &(&self.db).into())
+            .await
+    }
+
+    async fn create_category_with_tx(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<i64, AccountCategoryServiceError> {
+        create_request.validate()?;
+        let new_category: AccountCategoryActiveModel = create_request.into();
+
+        let res = AccountCategoryEntity::insert(new_category)
+            .on_conflict(
+                // force update to ensure a record is returned
+                OnConflict::column(crate::db::entities::account_category::Column::Name)
+                    .update_column(crate::db::entities::account_category::Column::Name)
+                    .to_owned(),
+            )
+            .exec_with_returning(tx)
+            .await?;
+        Ok(res.id)
+    }
+
+    async fn delete_category(&self, id: &i64) -> Result<(), AccountCategoryServiceError> {
+        // check if any accounts are using this category before deleting
+        let accounts_using_category = crate::db::entities::account::Entity::find()
+            .filter(crate::db::entities::account::Column::AccountCategoryId.eq(*id))
+            .count(&self.db)
+            .await?;
+
+        if accounts_using_category > 0 {
+            return Err(AccountCategoryServiceError::Validation(
+                "Cannot delete category that has accounts".to_string(),
+            ));
+        }
+
+        let category = AccountCategoryEntity::find_by_id(*id).one(&self.db).await?;
+        if let Some(category) = category {
+            category.delete(&self.db).await?;
+            Ok(())
+        } else {
+            Err(AccountCategoryServiceError::TargetNotFound(
+                "Category not found".to_string(),
+            ))
+        }
+    }
+
+    async fn update_category(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+    ) -> Result<(), AccountCategoryServiceError> {
+        self.update_category_with_tx(id, update_request, &(&self.db).into())
+            .await
+    }
+
+    async fn update_category_with_tx(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<(), AccountCategoryServiceError> {
+        update_request.validate()?;
+
+        let category = AccountCategoryEntity::find_by_id(*id)
+            .one(&self.db)
+            .await
+            .map(|opt| opt.map(|model| model.into_active_model()))?;
+
+        if let Some(mut category) = category {
+            update_request.apply_to(&mut category);
+            category.updated_at = Set(chrono::Utc::now().to_rfc3339());
+            category.update(tx).await?;
+            Ok(())
+        } else {
+            Err(AccountCategoryServiceError::TargetNotFound(
+                "Category not found".to_string(),
+            ))
+        }
+    }
+}

src-tauri/src/services/accounts/category/service.rs

@@ -0,0 +1,107 @@
+use std::sync::Arc;
+
+use crate::{
+    db::Db,
+    services::accounts::category::{
+        dto::{
+            AccountCategory, AccountCategoryServiceError, CreateAccountCategoryRequest,
+            UpdateAccountCategoryRequest,
+        },
+        repo::AccountCategoryRepoService,
+    },
+};
+use sea_orm::DatabaseConnection;
+
+#[async_trait::async_trait]
+pub trait AccountCategoryService: Send + Sync + 'static {
+    async fn get_categories(&self) -> Result<Vec<AccountCategory>, AccountCategoryServiceError>;
+    async fn create_category(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+    ) -> Result<i64, AccountCategoryServiceError>;
+
+    async fn create_category_with_tx(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<i64, AccountCategoryServiceError>;
+
+    async fn update_category(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+    ) -> Result<(), AccountCategoryServiceError>;
+
+    async fn update_category_with_tx(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<(), AccountCategoryServiceError>;
+
+    async fn delete_category(&self, id: &i64) -> Result<(), AccountCategoryServiceError>;
+}
+
+pub struct AccountCategoryServiceImpl<T>
+where
+    T: super::repo::AccountCategoryRepoService + ?Sized,
+{
+    db: DatabaseConnection,
+    repo: Arc<T>,
+}
+
+impl AccountCategoryServiceImpl<super::repo::AccountCategoryRepoServiceImpl> {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self {
+            db: db.clone(),
+            repo: Arc::new(super::repo::AccountCategoryRepoServiceImpl::new(db.clone())),
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl AccountCategoryService
+    for AccountCategoryServiceImpl<super::repo::AccountCategoryRepoServiceImpl>
+{
+    async fn get_categories(&self) -> Result<Vec<AccountCategory>, AccountCategoryServiceError> {
+        self.repo.get_categories().await
+    }
+
+    async fn create_category(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+    ) -> Result<i64, AccountCategoryServiceError> {
+        self.repo.create_category(create_request).await
+    }
+
+    async fn create_category_with_tx(
+        &self,
+        create_request: CreateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<i64, AccountCategoryServiceError> {
+        self.repo.create_category_with_tx(create_request, tx).await
+    }
+
+    async fn delete_category(&self, id: &i64) -> Result<(), AccountCategoryServiceError> {
+        self.repo.delete_category(id).await
+    }
+
+    async fn update_category(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+    ) -> Result<(), AccountCategoryServiceError> {
+        self.repo.update_category(id, update_request).await
+    }
+
+    async fn update_category_with_tx(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountCategoryRequest,
+        tx: &Db,
+    ) -> Result<(), AccountCategoryServiceError> {
+        self.repo
+            .update_category_with_tx(id, update_request, tx)
+            .await
+    }
+}

src-tauri/src/services/accounts/dto.rs

@@ -0,0 +1,130 @@
+use sea_orm::ActiveValue::Set;
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    db::{
+        DbServiceError,
+        entities::{
+            account::{ActiveModel as AccountActiveModel, Model as AccountModel},
+            account_category::Model as AccountCategoryModel,
+        },
+    },
+    services::accounts::category::{
+        AccountCategoryServiceError, AccountType, CreateAccountCategoryRequest,
+        UpdateAccountCategoryRequest,
+    },
+};
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum AccountsServiceError {
+    #[error("database error: {0}")]
+    DbErr(#[from] DbServiceError),
+    #[error("Target not found: {0}")]
+    TargetNotFound(String),
+    #[error("Validation error: {0}")]
+    Validation(String),
+    #[error("unknown error: {0}")]
+    Unknown(String),
+}
+
+impl From<sea_orm::DbErr> for AccountsServiceError {
+    fn from(err: sea_orm::DbErr) -> Self {
+        AccountsServiceError::DbErr(DbServiceError::from(err))
+    }
+}
+
+impl From<AccountCategoryServiceError> for AccountsServiceError {
+    fn from(err: AccountCategoryServiceError) -> Self {
+        match err {
+            AccountCategoryServiceError::DbErr(db_err) => AccountsServiceError::DbErr(db_err),
+            AccountCategoryServiceError::Validation(msg) => AccountsServiceError::Validation(msg),
+            AccountCategoryServiceError::TargetNotFound(msg) => {
+                AccountsServiceError::TargetNotFound(msg)
+            }
+            AccountCategoryServiceError::Unknown(msg) => AccountsServiceError::Unknown(msg),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Account {
+    pub id: i64,
+    pub name: String,
+    pub account_type: AccountType,
+    pub account_category: String,
+    //
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+impl From<(AccountModel, AccountCategoryModel)> for Account {
+    fn from((account_model, category_model): (AccountModel, AccountCategoryModel)) -> Self {
+        Account {
+            id: account_model.id,
+            name: account_model.name,
+            account_type: AccountType::from(category_model.account_type),
+            account_category: category_model.name,
+            created_at: account_model.created_at,
+            updated_at: account_model.updated_at,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CreateAccountRequest {
+    pub name: String,
+    pub category: CreateAccountCategoryRequest,
+}
+
+impl CreateAccountRequest {
+    pub fn validate(&self) -> Result<(), AccountsServiceError> {
+        if self.name.trim().is_empty() {
+            return Err(AccountsServiceError::Validation(
+                "Account name cannot be empty".to_string(),
+            ));
+        }
+        self.category.validate()?;
+        Ok(())
+    }
+}
+
+impl From<(CreateAccountRequest, i64)> for AccountActiveModel {
+    fn from((request, category_id): (CreateAccountRequest, i64)) -> Self {
+        AccountActiveModel {
+            name: Set(request.name),
+            account_category_id: Set(category_id),
+            created_at: Set(chrono::Utc::now().to_rfc3339()),
+            updated_at: Set(chrono::Utc::now().to_rfc3339()),
+            ..Default::default()
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UpdateAccountRequest {
+    pub name: Option<String>,
+    pub category: Option<UpdateAccountCategoryRequest>,
+}
+
+impl UpdateAccountRequest {
+    pub fn validate(&self) -> Result<(), AccountsServiceError> {
+        if let Some(name) = &self.name {
+            if name.trim().is_empty() {
+                return Err(AccountsServiceError::Validation(
+                    "Account name cannot be empty".to_string(),
+                ));
+            }
+        }
+        if let Some(category) = &self.category {
+            category.validate()?;
+        }
+        Ok(())
+    }
+
+    pub fn apply_to(&self, account: &mut AccountActiveModel) {
+        if let Some(name) = &self.name {
+            account.name = Set(name.clone());
+        }
+    }
+}

src-tauri/src/services/accounts/mod.rs

@@ -1,191 +1,7 @@
-// TODO: validation for all dto
-use std::sync::Arc;
-
-use crate::{
-    db::entities::{
-        account::{
-            ActiveModel as AccountActiveModel, Entity as AccountEntity, Model as AccountModel,
-        },
-        account_category::{
-            ActiveModel as AccountCategoryActiveModel, Entity as AccountCategoryEntity,
-            Model as AccountCategoryModel,
-        },
-    },
-    services::accounts::category::{
-        AccountType, CreateAccountCategoryRequest, UpdateAccountCategoryRequest,
-    },
-};
-use sea_orm::{
-    ActiveModelTrait, ActiveValue::Set, DatabaseConnection, EntityTrait, TransactionTrait,
-};
-use serde::{Deserialize, Serialize};
-
 pub mod category;
+mod dto;
+mod repo;
+mod service;
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+pub use dto::*;
-pub struct Account {
+pub use service::*;
-    pub id: i64,
-    pub name: String,
-    pub account_type: AccountType,
-    pub account_category: String,
-    //
-    pub created_at: String,
-    pub updated_at: String,
-}
-
-impl From<(AccountModel, AccountCategoryModel)> for Account {
-    fn from((account_model, category_model): (AccountModel, AccountCategoryModel)) -> Self {
-        Account {
-            id: account_model.id,
-            name: account_model.name,
-            account_type: AccountType::from(category_model.account_type),
-            account_category: category_model.name,
-            created_at: account_model.created_at,
-            updated_at: account_model.updated_at,
-        }
-    }
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct CreateAccountRequest {
-    pub name: String,
-    pub category: CreateAccountCategoryRequest,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct UpdateAccountRequest {
-    pub name: Option<String>,
-    pub category: Option<UpdateAccountCategoryRequest>,
-}
-
-#[async_trait::async_trait]
-pub trait AccountsService: Send + Sync + 'static {
-    async fn get_accounts(&self) -> Result<Vec<Account>, String>;
-    async fn get_account(&self, id: &i64) -> Result<Option<Account>, String>;
-    async fn create_account(&self, create_request: CreateAccountRequest) -> Result<i64, String>;
-    async fn update_account(
-        &self,
-        id: &i64,
-        update_request: UpdateAccountRequest,
-    ) -> Result<(), String>;
-    async fn delete_account(&self, id: &i64) -> Result<(), String>;
-}
-
-pub struct AccountsServiceImpl {
-    db: DatabaseConnection,
-    account_category_service: Arc<dyn category::AccountCategoryService>,
-}
-
-impl AccountsServiceImpl {
-    pub fn new(
-        db: DatabaseConnection,
-        account_category_service: Arc<dyn category::AccountCategoryService>,
-    ) -> Self {
-        Self {
-            db,
-            account_category_service,
-        }
-    }
-}
-
-#[async_trait::async_trait]
-impl AccountsService for AccountsServiceImpl {
-    async fn get_accounts(&self) -> Result<Vec<Account>, String> {
-        let accounts = AccountEntity::find()
-            .find_both_related(AccountCategoryEntity)
-            .all(&self.db)
-            .await;
-        match accounts {
-            Ok(accounts) => Ok(accounts.into_iter().map(|a| a.into()).collect()),
-            Err(e) => Err(format!("Failed to fetch accounts: {}", e)),
-        }
-    }
-
-    async fn get_account(&self, id: &i64) -> Result<Option<Account>, String> {
-        let result = AccountEntity::find_by_id(*id)
-            .find_both_related(AccountCategoryEntity)
-            .one(&self.db)
-            .await;
-
-        match result {
-            Ok(Some(account)) => Ok(Some(account.into())),
-            Ok(None) => Ok(None),
-            Err(e) => Err(format!("Failed to fetch account: {}", e)),
-        }
-    }
-
-    async fn create_account(&self, create_request: CreateAccountRequest) -> Result<i64, String> {
-        let tx = self.db.begin().await.map_err(|e| e.to_string())?;
-
-        let category_id = self
-            .account_category_service
-            .create_category_with_tx(
-                CreateAccountCategoryRequest {
-                    name: create_request.category.name,
-                    account_type: create_request.category.account_type,
-                },
-                &(&tx).into(),
-            )
-            .await?;
-
-        let new_account = AccountEntity::insert(AccountActiveModel {
-            name: Set(create_request.name),
-            created_at: Set(chrono::Utc::now().to_rfc3339()),
-            updated_at: Set(chrono::Utc::now().to_rfc3339()),
-            account_category_id: Set(category_id),
-            ..Default::default()
-        })
-        .exec(&tx)
-        .await;
-
-        tx.commit().await.map_err(|e| e.to_string())?;
-
-        match new_account {
-            Ok(res) => Ok(res.last_insert_id),
-            Err(e) => Err(format!("Failed to create account: {}", e)),
-        }
-    }
-
-    async fn update_account(
-        &self,
-        id: &i64,
-        update_request: UpdateAccountRequest,
-    ) -> Result<(), String> {
-        let tx = self.db.begin().await.map_err(|e| e.to_string())?;
-        let account = AccountEntity::find_by_id(*id).one(&tx).await;
-        match account {
-            Ok(Some(account)) => {
-                let mut active_model: AccountActiveModel = account.into();
-                // Only update fields that are provided in the request
-                if let Some(name) = update_request.name {
-                    active_model.name = Set(name);
-                }
-                //
-                if let Some(category_request) = update_request.category {
-                    // update the category if it is provided in the request
-                    self.account_category_service
-                        .update_category_with_tx(id, category_request, &(&tx).into())
-                        .await?;
-                }
-                active_model.updated_at = Set(chrono::Utc::now().to_rfc3339());
-                //
-                active_model.update(&tx).await.map_err(|e| e.to_string())?;
-                let res = tx.commit().await.map_err(|e| e.to_string());
-                match res {
-                    Ok(_) => Ok(()),
-                    Err(e) => Err(format!("Failed to update account: {}", e)),
-                }
-            }
-            Ok(None) => Err("Account not found".to_string()),
-            Err(e) => Err(format!("Failed to fetch account: {}", e)),
-        }
-    }
-
-    async fn delete_account(&self, id: &i64) -> Result<(), String> {
-        let res = AccountEntity::delete_by_id(*id).exec(&self.db).await;
-        match res {
-            Ok(_) => Ok(()),
-            Err(e) => Err(format!("Failed to delete account: {}", e)),
-        }
-    }
-}

src-tauri/src/services/accounts/repo.rs

@@ -0,0 +1,150 @@
+use std::sync::Arc;
+
+use sea_orm::{
+    ActiveModelTrait, ActiveValue::Set, DatabaseConnection, EntityTrait, TransactionTrait,
+};
+
+use crate::{
+    db::entities::{
+        account::{ActiveModel as AccountActiveModel, Entity as AccountEntity},
+        account_category::Entity as AccountCategoryEntity,
+    },
+    services::accounts::{
+        category::CreateAccountCategoryRequest,
+        dto::{Account, AccountsServiceError, CreateAccountRequest, UpdateAccountRequest},
+    },
+};
+
+#[async_trait::async_trait]
+pub trait AccountsRepoService: Send + Sync + 'static {
+    async fn get_accounts(&self) -> Result<Vec<Account>, AccountsServiceError>;
+    async fn get_account(&self, id: &i64) -> Result<Option<Account>, AccountsServiceError>;
+    async fn create_account(
+        &self,
+        create_request: CreateAccountRequest,
+    ) -> Result<i64, AccountsServiceError>;
+    async fn update_account(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountRequest,
+    ) -> Result<(), AccountsServiceError>;
+    async fn delete_account(&self, id: &i64) -> Result<(), AccountsServiceError>;
+}
+
+pub struct AccountsRepoServiceImpl<T>
+where
+    T: super::category::AccountCategoryService + ?Sized,
+{
+    db: DatabaseConnection,
+    account_category_service: Arc<T>,
+}
+
+impl<T> AccountsRepoServiceImpl<T>
+where
+    T: super::category::AccountCategoryService + ?Sized,
+{
+    pub fn new(db: DatabaseConnection, account_category_service: Arc<T>) -> Self {
+        Self {
+            db,
+            account_category_service,
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl<T> AccountsRepoService for AccountsRepoServiceImpl<T>
+where
+    T: super::category::AccountCategoryService + ?Sized,
+{
+    async fn get_accounts(&self) -> Result<Vec<Account>, AccountsServiceError> {
+        let accounts = AccountEntity::find()
+            .find_both_related(AccountCategoryEntity)
+            .all(&self.db)
+            .await?;
+        Ok(accounts.into_iter().map(|a| a.into()).collect())
+    }
+
+    async fn get_account(&self, id: &i64) -> Result<Option<Account>, AccountsServiceError> {
+        let result = AccountEntity::find_by_id(*id)
+            .find_both_related(AccountCategoryEntity)
+            .one(&self.db)
+            .await;
+
+        match result {
+            Ok(Some(account)) => Ok(Some(account.into())),
+            Ok(None) => Ok(None),
+            Err(e) => Err(e.into()),
+        }
+    }
+
+    async fn create_account(
+        &self,
+        create_request: CreateAccountRequest,
+    ) -> Result<i64, AccountsServiceError> {
+        let tx = self.db.begin().await?;
+
+        let category_id = self
+            .account_category_service
+            .create_category_with_tx(
+                CreateAccountCategoryRequest {
+                    name: create_request.category.name,
+                    account_type: create_request.category.account_type,
+                },
+                &(&tx).into(),
+            )
+            .await?;
+
+        let new_account = AccountEntity::insert(AccountActiveModel {
+            name: Set(create_request.name),
+            created_at: Set(chrono::Utc::now().to_rfc3339()),
+            updated_at: Set(chrono::Utc::now().to_rfc3339()),
+            account_category_id: Set(category_id),
+            ..Default::default()
+        })
+        .exec(&tx)
+        .await?;
+
+        tx.commit().await?;
+
+        Ok(new_account.last_insert_id)
+    }
+
+    async fn update_account(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountRequest,
+    ) -> Result<(), AccountsServiceError> {
+        let tx = self.db.begin().await?;
+        let account = AccountEntity::find_by_id(*id).one(&tx).await;
+        match account {
+            Ok(Some(account)) => {
+                let mut active_model: AccountActiveModel = account.into();
+                // Only update fields that are provided in the request
+                if let Some(name) = update_request.name {
+                    active_model.name = Set(name);
+                }
+                //
+                if let Some(category_request) = update_request.category {
+                    // update the category if it is provided in the request
+                    self.account_category_service
+                        .update_category_with_tx(id, category_request, &(&tx).into())
+                        .await?;
+                }
+                active_model.updated_at = Set(chrono::Utc::now().to_rfc3339());
+                //
+                active_model.update(&tx).await?;
+                tx.commit().await?;
+                Ok(())
+            }
+            Ok(None) => Err(AccountsServiceError::TargetNotFound(
+                "Account not found".to_string(),
+            )),
+            Err(e) => Err(e.into()),
+        }
+    }
+
+    async fn delete_account(&self, id: &i64) -> Result<(), AccountsServiceError> {
+        AccountEntity::delete_by_id(*id).exec(&self.db).await?;
+        Ok(())
+    }
+}

src-tauri/src/services/accounts/service.rs

@@ -0,0 +1,78 @@
+use std::sync::Arc;
+
+use crate::services::accounts::{
+    Account, AccountsServiceError, CreateAccountRequest, UpdateAccountRequest,
+};
+use sea_orm::DatabaseConnection;
+
+#[async_trait::async_trait]
+pub trait AccountsService: Send + Sync + 'static {
+    async fn get_accounts(&self) -> Result<Vec<Account>, AccountsServiceError>;
+    async fn get_account(&self, id: &i64) -> Result<Option<Account>, AccountsServiceError>;
+    async fn create_account(
+        &self,
+        create_request: CreateAccountRequest,
+    ) -> Result<i64, AccountsServiceError>;
+    async fn update_account(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountRequest,
+    ) -> Result<(), AccountsServiceError>;
+    async fn delete_account(&self, id: &i64) -> Result<(), AccountsServiceError>;
+}
+
+pub struct AccountsServiceImpl<T>
+where
+    T: super::repo::AccountsRepoService + ?Sized,
+{
+    db: DatabaseConnection,
+    repo: Arc<T>,
+}
+
+impl<T> AccountsServiceImpl<super::repo::AccountsRepoServiceImpl<T>>
+where
+    T: super::category::AccountCategoryService + ?Sized,
+{
+    pub fn new(db: DatabaseConnection, account_category_service: Arc<T>) -> Self {
+        Self {
+            db: db.clone(),
+            repo: Arc::new(super::repo::AccountsRepoServiceImpl::new(
+                db.clone(),
+                account_category_service,
+            )),
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl<T> AccountsService for AccountsServiceImpl<T>
+where
+    T: super::repo::AccountsRepoService + ?Sized,
+{
+    async fn get_accounts(&self) -> Result<Vec<Account>, AccountsServiceError> {
+        self.repo.get_accounts().await
+    }
+
+    async fn get_account(&self, id: &i64) -> Result<Option<Account>, AccountsServiceError> {
+        self.repo.get_account(id).await
+    }
+
+    async fn create_account(
+        &self,
+        create_request: CreateAccountRequest,
+    ) -> Result<i64, AccountsServiceError> {
+        self.repo.create_account(create_request).await
+    }
+
+    async fn update_account(
+        &self,
+        id: &i64,
+        update_request: UpdateAccountRequest,
+    ) -> Result<(), AccountsServiceError> {
+        self.repo.update_account(id, update_request).await
+    }
+
+    async fn delete_account(&self, id: &i64) -> Result<(), AccountsServiceError> {
+        self.repo.delete_account(id).await
+    }
+}

src-tauri/src/services/cache/dto.rs

@@ -0,0 +1,108 @@
+use std::fmt::Display;
+
+use crate::db::entities::cache::Model as CacheModel;
+
+use sea_orm::DbErr;
+use thiserror::Error;
+
+use crate::db::DbServiceError;
+
+pub enum CacheValue {
+    Ok(String),
+    Expired(String),
+    NotFound,
+}
+
+impl From<Option<CacheModel>> for CacheValue {
+    fn from(opt: Option<CacheModel>) -> Self {
+        match opt {
+            Some(model) => model.into(),
+            None => CacheValue::NotFound,
+        }
+    }
+}
+
+impl From<CacheModel> for (String, CacheValue) {
+    fn from(model: CacheModel) -> Self {
+        let key = model.key.clone();
+        let value = model.into();
+        (key, value)
+    }
+}
+
+impl From<CacheModel> for CacheValue {
+    fn from(model: CacheModel) -> Self {
+        if let Some(expire_at) = model.expire_at {
+            let expire_at = chrono::DateTime::parse_from_rfc3339(&expire_at)
+                .map(|dt| dt.with_timezone(&chrono::Utc));
+
+            match expire_at {
+                Ok(expire_at) if expire_at < chrono::Utc::now() => {
+                    return CacheValue::Expired(model.value);
+                }
+                Ok(_) => {} // Not expired
+                Err(_) => {
+                    // warn!("Failed to parse expire_at: {}", model.expire_at);
+                    // If parsing fails, treat it as expired to be safe
+                    return CacheValue::Expired(model.value);
+                }
+            }
+        }
+
+        CacheValue::Ok(model.value)
+    }
+}
+
+#[derive(Error, Debug)]
+pub enum CacheServiceError {
+    #[error("database error: {0}")]
+    DbErr(#[from] DbServiceError),
+    #[error("target expired: {0}")]
+    TargetExpired(String),
+    #[error("Target not found: {0}")]
+    TargetNotFound(String),
+    #[error("Validation error: {0}")]
+    Validation(String),
+    #[error("unknown error: {0}")]
+    Unknown(String),
+}
+
+impl From<DbErr> for CacheServiceError {
+    fn from(value: DbErr) -> Self {
+        CacheServiceError::DbErr(DbServiceError::from(value))
+    }
+}
+
+#[derive(Debug, Clone)]
+pub enum CacheCategory {
+    Transaction,
+    TransactionTag,
+    Account,
+    Unknown(String),
+}
+
+impl From<&str> for CacheCategory {
+    fn from(value: &str) -> Self {
+        match value {
+            "Transaction" => CacheCategory::Transaction,
+            "TransactionTag" => CacheCategory::TransactionTag,
+            "Account" => CacheCategory::Account,
+            other => {
+                // warn!("Unknown cache category: {}", other);
+                CacheCategory::Unknown(other.to_string())
+            }
+        }
+    }
+}
+
+impl Display for CacheCategory {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let s = match self {
+            CacheCategory::Transaction => "Transaction",
+            CacheCategory::TransactionTag => "TransactionTag",
+            CacheCategory::Account => "Account",
+            CacheCategory::Unknown(other) => other.as_str(),
+        };
+        write!(f, "{}", s)
+    }
+}

src-tauri/src/services/cache/mod.rs

@@ -0,0 +1,6 @@
+mod dto;
+mod repo;
+mod service;
+
+pub use dto::*;
+pub use service::*;

src-tauri/src/services/cache/repo.rs

@@ -0,0 +1,182 @@
+use std::collections::HashMap;
+
+use migration::Expr;
+use sea_orm::{ActiveValue::Set, ColumnTrait, DatabaseConnection, EntityTrait, QueryFilter, Value};
+
+use super::{dto::CacheCategory, service::CacheResult};
+use crate::db::{
+    Db,
+    entities::cache::{
+        ActiveModel as CacheActiveModel, Column as CacheColumn, Entity as CacheEntity,
+        Model as CacheModel,
+    },
+};
+
+type Result<T> = CacheResult<T>;
+
+#[async_trait::async_trait]
+pub trait CacheRepo: Send + Sync + 'static {
+    async fn get_category(&self, category: CacheCategory) -> Result<HashMap<String, CacheModel>>;
+    async fn get(&self, category: CacheCategory, key: &str) -> Result<Option<CacheModel>>;
+    async fn set_with_tx(
+        &self,
+        tx: &Db,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()>;
+    async fn set(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()>;
+    async fn invalidate_category(&self, category: CacheCategory) -> Result<()>;
+    async fn invalidate_with_tx(&self, tx: &Db, category: CacheCategory, key: &str) -> Result<()>;
+    async fn invalidate(&self, category: CacheCategory, key: &str) -> Result<()>;
+    async fn set_expire(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()>;
+}
+
+pub struct CacheRepoImpl {
+    db: DatabaseConnection,
+}
+
+impl CacheRepoImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
+}
+
+#[async_trait::async_trait]
+impl CacheRepo for CacheRepoImpl {
+    async fn get_category(&self, category: CacheCategory) -> Result<HashMap<String, CacheModel>> {
+        let cache_entries = CacheEntity::find()
+            .filter(CacheColumn::Category.eq(category.to_string()))
+            .all(&self.db)
+            .await?;
+
+        let result = cache_entries
+            .into_iter()
+            .map(|entry| (entry.key.clone(), entry))
+            .collect();
+        Ok(result)
+    }
+
+    async fn get(&self, category: CacheCategory, key: &str) -> Result<Option<CacheModel>> {
+        let cache_entry = CacheEntity::find()
+            .filter(CacheColumn::Category.eq(category.to_string()))
+            .filter(CacheColumn::Key.eq(key.to_string()))
+            .one(&self.db)
+            .await?;
+
+        Ok(cache_entry)
+    }
+
+    async fn set(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()> {
+        self.set_with_tx(&(&self.db).into(), category, key, value, expire_at)
+            .await
+    }
+
+    async fn set_with_tx(
+        &self,
+        tx: &Db,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()> {
+        let expire_at_str = expire_at.map(|dt| dt.to_rfc3339());
+        let now_str = chrono::Utc::now().to_rfc3339();
+        let active_model = CacheActiveModel {
+            category: Set(category.to_string()),
+            key: Set(key.to_string()),
+            value: Set(value.to_string()),
+            is_invalidated: Set(false),
+            expire_at: Set(expire_at_str),
+            created_at: Set(now_str.clone()),
+            updated_at: Set(now_str),
+        };
+
+        CacheEntity::insert(active_model)
+            .on_conflict(
+                sea_orm::sea_query::OnConflict::columns([CacheColumn::Category, CacheColumn::Key])
+                    .update_columns([
+                        CacheColumn::Value,
+                        CacheColumn::IsInvalidated,
+                        CacheColumn::ExpireAt,
+                        CacheColumn::UpdatedAt,
+                    ])
+                    .to_owned(),
+            )
+            .exec(tx)
+            .await?;
+        Ok(())
+    }
+
+    async fn invalidate_category(&self, category: CacheCategory) -> Result<()> {
+        CacheEntity::update_many()
+            .col_expr(
+                CacheColumn::IsInvalidated,
+                Expr::value(Value::Bool(Some(true))),
+            )
+            .filter(CacheColumn::Category.eq(category.to_string()))
+            .exec(&self.db)
+            .await?;
+        Ok(())
+    }
+
+    async fn invalidate(&self, category: CacheCategory, key: &str) -> Result<()> {
+        self.invalidate_with_tx(&(&self.db).into(), category, key)
+            .await
+    }
+
+    async fn invalidate_with_tx(&self, tx: &Db, category: CacheCategory, key: &str) -> Result<()> {
+        let target_entry = CacheActiveModel {
+            // pks
+            category: Set(category.to_string()),
+            key: Set(key.to_string()),
+            // update
+            is_invalidated: Set(true),
+            ..Default::default()
+        };
+        CacheEntity::update(target_entry)
+            .validate()?
+            .exec(tx)
+            .await?;
+        Ok(())
+    }
+    async fn set_expire(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()> {
+        let expire_at_str = expire_at.map(|dt| dt.to_rfc3339());
+        let target_entry = CacheActiveModel {
+            // pks
+            category: Set(category.to_string()),
+            key: Set(key.to_string()),
+            // update
+            expire_at: Set(expire_at_str),
+            ..Default::default()
+        };
+        CacheEntity::update(target_entry)
+            .validate()?
+            .exec(&self.db)
+            .await?;
+        Ok(())
+    }
+}

src-tauri/src/services/cache/service.rs

@@ -0,0 +1,123 @@
+use std::{collections::HashMap, sync::Arc};
+
+use sea_orm::DatabaseConnection;
+
+use super::dto::CacheCategory;
+use crate::{
+    db::Db,
+    services::cache::{CacheServiceError, CacheValue},
+};
+
+pub type CacheResult<T> = std::result::Result<T, CacheServiceError>;
+type Result<T> = CacheResult<T>;
+
+#[async_trait::async_trait]
+pub trait CacheService: Send + Sync + 'static {
+    async fn get_category(&self, category: CacheCategory) -> Result<HashMap<String, CacheValue>>;
+    async fn get(&self, category: CacheCategory, key: &str) -> Result<CacheValue>;
+    async fn set_with_tx(
+        &self,
+        tx: &Db,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()>;
+    async fn set(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()>;
+    async fn invalidate_category(&self, category: CacheCategory) -> Result<()>;
+    async fn invalidate_with_tx(&self, tx: &Db, category: CacheCategory, key: &str) -> Result<()>;
+    async fn invalidate(&self, category: CacheCategory, key: &str) -> Result<()>;
+    async fn set_expire(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()>;
+}
+
+pub struct CacheServiceImpl<T>
+where
+    T: super::repo::CacheRepo + ?Sized,
+{
+    db: DatabaseConnection,
+    repo: Arc<T>,
+}
+
+impl CacheServiceImpl<super::repo::CacheRepoImpl> {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self {
+            db: db.clone(),
+            repo: Arc::new(super::repo::CacheRepoImpl::new(db)),
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl<T> CacheService for CacheServiceImpl<T>
+where
+    T: super::repo::CacheRepo + ?Sized,
+{
+    async fn get_category(&self, category: CacheCategory) -> Result<HashMap<String, CacheValue>> {
+        let cache_entries = self.repo.get_category(category).await?;
+
+        let result = cache_entries
+            .into_iter()
+            .map(|(key, model)| (key, model.into()))
+            .collect();
+        Ok(result)
+    }
+
+    async fn get(&self, category: CacheCategory, key: &str) -> Result<CacheValue> {
+        let cache_entry = self.repo.get(category, key).await?;
+        Ok(cache_entry.into())
+    }
+
+    async fn set(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()> {
+        self.repo.set(category, key, value, expire_at).await
+    }
+
+    async fn set_with_tx(
+        &self,
+        tx: &Db,
+        category: CacheCategory,
+        key: &str,
+        value: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()> {
+        self.repo
+            .set_with_tx(tx, category, key, value, expire_at)
+            .await
+    }
+
+    async fn invalidate_category(&self, category: CacheCategory) -> Result<()> {
+        self.repo.invalidate_category(category).await
+    }
+
+    async fn invalidate(&self, category: CacheCategory, key: &str) -> Result<()> {
+        self.repo.invalidate(category, key).await
+    }
+
+    async fn invalidate_with_tx(&self, tx: &Db, category: CacheCategory, key: &str) -> Result<()> {
+        self.repo.invalidate_with_tx(tx, category, key).await
+    }
+    async fn set_expire(
+        &self,
+        category: CacheCategory,
+        key: &str,
+        expire_at: Option<chrono::DateTime<chrono::Utc>>,
+    ) -> Result<()> {
+        self.repo.set_expire(category, key, expire_at).await
+    }
+}

src-tauri/src/services/mod.rs

@@ -7,6 +7,7 @@ use crate::services::{
         AccountsService, AccountsServiceImpl,
         category::{AccountCategoryService, AccountCategoryServiceImpl},
     },
+    cache::{CacheService, CacheServiceImpl},
     transaction::{
         TransactionService, TransactionServiceImpl,
         category::{CategoryService, CategoryServiceImpl},
@@ -15,6 +16,7 @@ use crate::services::{
 };
 
 pub mod accounts;
+pub mod cache;
 pub mod transaction;
 
 pub type AppState = Services<
@@ -23,22 +25,25 @@ pub type AppState = Services<
     dyn TransactionService,
     dyn CategoryService,
     dyn TagService,
+    dyn CacheService,
 >;
 
 #[derive(Clone)]
-pub struct Services<AC, A, T, TC, TT>
+pub struct Services<AC, A, T, TC, TT, C>
 where
     AC: AccountCategoryService + ?Sized,
     A: AccountsService + ?Sized,
     T: TransactionService + ?Sized,
     TC: CategoryService + ?Sized,
     TT: TagService + ?Sized,
+    C: CacheService + ?Sized,
 {
     pub account_category: Arc<AC>,
     pub accounts: Arc<A>,
     pub transaction: Arc<T>,
     pub transaction_category: Arc<TC>,
     pub transaction_tag: Arc<TT>,
+    pub cache: Arc<C>,
 }
 
 pub fn create_services(db: DatabaseConnection) -> AppState {
@@ -51,6 +56,8 @@ pub fn create_services(db: DatabaseConnection) -> AppState {
     let transaction_category_service: Arc<dyn CategoryService> =
         Arc::new(CategoryServiceImpl::new(db.clone()));
     let transaction_tag_service: Arc<dyn TagService> = Arc::new(TagServiceImpl::new(db.clone()));
+    let cache_service: Arc<dyn CacheService> = Arc::new(CacheServiceImpl::new(db.clone()));
+
     Services {
         account_category: account_category_service.clone(),
         accounts: account_service.clone(),
@@ -62,5 +69,6 @@ pub fn create_services(db: DatabaseConnection) -> AppState {
         )) as Arc<dyn TransactionService>,
         transaction_category: transaction_category_service,
         transaction_tag: transaction_tag_service,
+        cache: cache_service,
     }
 }

src-tauri/src/services/transaction/category/repo.rs

@@ -2,8 +2,8 @@ use std::sync::Arc;
 
 use crate::{
     db::{
-        entities::category::{ActiveModel as CategoryActiveModel, Entity as CategoryEntity},
         Db,
+        entities::category::{ActiveModel as CategoryActiveModel, Entity as CategoryEntity},
     },
     services::transaction::category::{
         Category, CategoryServiceError, CategoryServiceResult, CategoryWithParent,
@@ -22,7 +22,7 @@ pub trait CategoryRepoService: Send + Sync + 'static {
     async fn get_category(&self, id: i64) -> Result<Option<CategoryWithParent>>;
     async fn create_category(&self, request: CreateCategoryRequest) -> Result<i64>;
     async fn create_category_with_tx(&self, request: CreateCategoryRequest, tx: &Db)
-        -> Result<i64>;
+    -> Result<i64>;
     async fn update_category(&self, id: i64, request: UpdateCategoryRequest) -> Result<()>;
     async fn update_category_with_tx(
         &self,
@@ -35,7 +35,13 @@ pub trait CategoryRepoService: Send + Sync + 'static {
 
 #[derive(Clone)]
 pub struct CategoryRepoServiceImpl {
-    pub db: DatabaseConnection,
+    db: DatabaseConnection,
+}
+
+impl CategoryRepoServiceImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
 }
 
 struct CategorySelfRefLink;

src-tauri/src/services/transaction/category/service.rs

@@ -6,8 +6,8 @@ use thiserror::Error;
 use crate::{
     db::{Db, DbServiceError},
     services::transaction::category::{
-        repo::{CategoryRepoService, CategoryRepoServiceImpl},
         Category, CategoryWithParent, CreateCategoryRequest, UpdateCategoryRequest,
+        repo::{CategoryRepoService, CategoryRepoServiceImpl},
     },
 };
 
@@ -39,7 +39,7 @@ pub trait CategoryService: Send + Sync + 'static {
     async fn get_category(&self, id: i64) -> Result<Option<CategoryWithParent>>;
     async fn create_category(&self, request: CreateCategoryRequest) -> Result<i64>;
     async fn create_category_with_tx(&self, request: CreateCategoryRequest, tx: &Db)
-        -> Result<i64>;
+    -> Result<i64>;
     async fn update_category(&self, id: i64, request: UpdateCategoryRequest) -> Result<()>;
     async fn update_category_with_tx(
         &self,
@@ -62,7 +62,7 @@ impl CategoryServiceImpl<CategoryRepoServiceImpl> {
     pub fn new(db: DatabaseConnection) -> Self {
         Self {
             db: db.clone(),
-            category_repo: Arc::new(CategoryRepoServiceImpl { db }),
+            category_repo: Arc::new(CategoryRepoServiceImpl::new(db)),
         }
     }
 }

src-tauri/src/services/transaction/dto.rs

@@ -7,7 +7,10 @@ use crate::{
         DbServiceError,
         entities::{account::Column::Id, transaction::Model as TransactionModel},
     },
-    services::transaction::{category::CategoryServiceError, tag::TagServiceError},
+    services::{
+        accounts::{Account, AccountsServiceError},
+        transaction::{category::CategoryServiceError, tag::TagServiceError},
+    },
 };
 
 use crate::db::{
@@ -61,6 +64,19 @@ impl From<CategoryServiceError> for TransactionServiceError {
     }
 }
 
+impl From<AccountsServiceError> for TransactionServiceError {
+    fn from(err: AccountsServiceError) -> Self {
+        match err {
+            AccountsServiceError::DbErr(db_err) => TransactionServiceError::DbErr(db_err),
+            AccountsServiceError::TargetNotFound(msg) => {
+                TransactionServiceError::TargetNotFound(msg)
+            }
+            AccountsServiceError::Validation(msg) => TransactionServiceError::Validation(msg),
+            AccountsServiceError::Unknown(msg) => TransactionServiceError::Unknown(msg),
+        }
+    }
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum TransactionType {
     #[serde(rename = "STANDARD")]
@@ -158,12 +174,7 @@ async fn validate_account_exists<T>(
 where
     T: crate::services::accounts::AccountsService + ?Sized,
 {
-    let account_exists = account_service
+    let account_exists = account_service.get_account(&account_id).await?.is_some();
-        .get_account(&account_id)
-        .await
-        // TODO: add error from account service to error chain
-        .map_err(|err| TransactionServiceError::Unknown(err))?
-        .is_some();
     if !account_exists {
         return Err(TransactionServiceError::Validation(format!(
             "Account with id {} does not exist",

src-tauri/src/services/transaction/tag/repo.rs

@@ -1,5 +1,6 @@
 use crate::{
     db::{
+        Db,
         entities::{
             tag::{ActiveModel as TagActiveModel, Entity as TagEntity},
             transaction_tag::{
@@ -7,7 +8,6 @@ use crate::{
                 Entity as TransactionTagEntity,
             },
         },
-        Db,
     },
     services::transaction::tag::{
         CreateTagRequest, Tag, TagServiceError, TagServiceResult, UpdateTagRequest,
@@ -45,7 +45,13 @@ pub trait TagRepoService: Send + Sync + 'static {
 
 #[derive(Clone)]
 pub struct TagRepoServiceImpl {
-    pub db: DatabaseConnection,
+    db: DatabaseConnection,
+}
+
+impl TagRepoServiceImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
 }
 
 #[async_trait::async_trait]

src-tauri/src/services/transaction/tag/service.rs

@@ -6,8 +6,8 @@ use thiserror::Error;
 use crate::{
     db::{Db, DbServiceError},
     services::transaction::tag::{
-        repo::{TagRepoService, TagRepoServiceImpl},
         CreateTagRequest, Tag, UpdateTagRequest,
+        repo::{TagRepoService, TagRepoServiceImpl},
     },
 };
 
@@ -67,7 +67,7 @@ impl TagServiceImpl<TagRepoServiceImpl> {
     pub fn new(db: DatabaseConnection) -> Self {
         Self {
             db: db.clone(),
-            tag_repo: Arc::new(TagRepoServiceImpl { db }),
+            tag_repo: Arc::new(TagRepoServiceImpl::new(db)),
         }
     }
 }

src-tauri/tauri.conf.json

@@ -13,8 +13,8 @@
     "windows": [
       {
         "title": "otter",
-        "width": 800,
+        "width": 390,
-        "height": 600
+        "height": 760
       }
     ],
     "security": {