Add POSCatalogSettingsService that loads data for POS catalog settings.

Author: jaclync

Modules/Sources/Yosemite/Tools/POS/POSCatalogSettingsService.swift

@@ -0,0 +1,61 @@
+import Foundation
+import GRDB
+import protocol Storage.GRDBManagerProtocol
+
+public protocol POSCatalogSettingsServiceProtocol {
+    /// Gets catalog statistics for the specified site.
+    /// - Parameter siteID: The site ID to get catalog statistics for.
+    /// - Returns: Catalog statistics including product/variation counts.
+    func loadCatalogStatistics(for siteID: Int64) async throws -> POSCatalogStatistics
+
+    /// Gets the last sync dates for the specified site.
+    /// - Parameter siteID: The site ID to get sync dates for.
+    /// - Returns: Sync dates information.
+    func loadSyncDates(for siteID: Int64) async throws -> POSSyncDates
+}
+
+public struct POSCatalogStatistics {
+    public let productCount: Int
+    public let variationCount: Int
+
+    public init(productCount: Int, variationCount: Int) {
+        self.productCount = productCount
+        self.variationCount = variationCount
+    }
+}
+
+public struct POSSyncDates {
+    public let lastFullSyncDate: Date?
+    public let lastIncrementalSyncDate: Date?
+
+    public init(lastFullSyncDate: Date?, lastIncrementalSyncDate: Date?) {
+        self.lastFullSyncDate = lastFullSyncDate
+        self.lastIncrementalSyncDate = lastIncrementalSyncDate
+    }
+}
+
+public class POSCatalogSettingsService: POSCatalogSettingsServiceProtocol {
+    private let grdbManager: GRDBManagerProtocol
+
+    public init(grdbManager: GRDBManagerProtocol) {
+        self.grdbManager = grdbManager
+    }
+
+    public func loadCatalogStatistics(for siteID: Int64) async throws -> POSCatalogStatistics {
+        try await grdbManager.databaseConnection.read { db in
+            let productCount = try PersistedProduct.filter { $0.siteID == siteID }.fetchCount(db)
+            let variationCount = try PersistedProductVariation.filter { $0.siteID == siteID }.fetchCount(db)
+            return POSCatalogStatistics(productCount: productCount, variationCount: variationCount)
+        }
+    }
+
+    public func loadSyncDates(for siteID: Int64) async throws -> POSSyncDates {
+        try await grdbManager.databaseConnection.read { db in
+            let site = try PersistedSite.filter(key: siteID).fetchOne(db)
+            return POSSyncDates(
+                lastFullSyncDate: site?.lastCatalogFullSyncDate,
+                lastIncrementalSyncDate: site?.lastCatalogIncrementalSyncDate
+            )
+        }
+    }
+}