Batch/Backup commands use SchemaFlag (#570)

This will allow the programs to configure what tables are build with lax
schema. Defaults to strict.

Fixes #564

Sources/iTunes/BackupCommand.swift

@@ -85,9 +85,9 @@ public struct BackupCommand: AsyncParsableCommand {
       "Reduce Tracks to minimum required fields and music related only. Defaults to false, unless repairing."
   ) var reduce: Bool = false
 
-  /// Database schema constraints. Only applicable with --sql-code or --db.
-  @Flag(help: "Database schema constraints. Only applicable with --sql-code or --db.")
-  var schemaConstraints: SchemaConstraints = .strict
+  /// Lax database schema table constraints. Only applicable with --sql-code or --db.
+  @Flag(help: "Lax database schema table constraints. Only applicable with --sql-code or --db.")
+  var laxSchema: [SchemaFlag] = []
 
   /// Optional Output Directory for output file.
   @Option(
@@ -137,7 +137,7 @@ public struct BackupCommand: AsyncParsableCommand {
 
     try await destination.context(outputFile: outputFile).emit(
       tracks, branch: "main", tagPrefix: tagPrefix, version: Self.configuration.version,
-      schemaOptions: schemaConstraints.schemaOptions)
+      schemaOptions: laxSchema.schemaOptions)
   }
 
   public init() {}  // This is public and empty to help the compiler.

Sources/iTunes/Batch/BatchCommand.swift

@@ -22,9 +22,9 @@ public struct BatchCommand: AsyncParsableCommand {
   /// Batch type.
   @Flag(help: "Batch type to build.") var batch: Batch = .sql
 
-  /// Database schema constraints.
-  @Flag(help: "Database schema constraints.")
-  var schemaConstraints: SchemaConstraints = .strict
+  /// Lax database schema table constraints.
+  @Flag(help: "Lax database schema table constraints")
+  var laxSchema: [SchemaFlag] = []
 
   /// Git Directory to read and write data from.
   @Option(
@@ -64,7 +64,7 @@ public struct BatchCommand: AsyncParsableCommand {
       directory: gitDirectory, tagPrefix: tagPrefix, fileName: Self.fileName)
     try await batch.build(
       configuration, outputDirectory: outputDirectory,
-      schemaOptions: schemaConstraints.schemaOptions)
+      schemaOptions: laxSchema.schemaOptions)
   }
 
   public init() {}  // This is public and empty to help the compiler.

Sources/iTunes/SchemaFlag.swift

@@ -0,0 +1,36 @@
+//
+//  SchemaFlag.swift
+//  itunes_json
+//
+//  Created by Greg Bolsinga on 12/25/24.
+//
+
+import ArgumentParser
+import Foundation
+
+enum SchemaFlag: String, EnumerableFlag {
+  case artists, albums, songs, plays
+}
+
+extension SchemaFlag {
+  var schemaOption: SchemaOptions {
+    switch self {
+    case .artists:
+      .laxArtist
+    case .albums:
+      .laxAlbum
+    case .songs:
+      .laxSong
+    case .plays:
+      .laxPlays
+    }
+  }
+}
+
+extension Collection where Element == SchemaFlag {
+  var schemaOptions: SchemaOptions {
+    self.reduce(into: SchemaOptions()) { partialResult, flag in
+      partialResult.insert(flag.schemaOption)
+    }
+  }
+}

Sources/iTunes/SchemaOptions.swift

@@ -10,10 +10,10 @@ import Foundation
 struct SchemaOptions: OptionSet {
   let rawValue: UInt
 
-  private static let laxArtist = SchemaOptions(rawValue: 1 << 0)
-  private static let laxAlbum = SchemaOptions(rawValue: 1 << 1)
-  private static let laxSong = SchemaOptions(rawValue: 1 << 2)
-  private static let laxPlays = SchemaOptions(rawValue: 1 << 3)
+  static let laxArtist = SchemaOptions(rawValue: 1 << 0)
+  static let laxAlbum = SchemaOptions(rawValue: 1 << 1)
+  static let laxSong = SchemaOptions(rawValue: 1 << 2)
+  static let laxPlays = SchemaOptions(rawValue: 1 << 3)
 
   static let strictSchema = SchemaOptions()
   static let laxSchema: SchemaOptions = [