Add label model

frontend/models/label.ts

@@ -0,0 +1,48 @@
+export class LabelItemList {
+  constructor(public labelItems: LabelItem[]) {}
+
+  static valueOf(items: LabelItem[]): LabelItemList {
+    return new LabelItemList(items)
+  }
+
+  get nameList(): string[] {
+    return this.labelItems.map(item => item.name)
+  }
+
+  toArray(): Object[] {
+    return this.labelItems.map(item => item.toObject())
+  }
+}
+
+export class LabelItem {
+  constructor(
+    public id: number,
+    public text: string,
+    public prefixKey: string,
+    public suffixKey: string,
+    public backgroundColor: string,
+    public textColor: string
+  ) {}
+
+  static valueOf(
+    { id, text, prefix_key, suffix_key, background_color, text_color }:
+    { id: number, text: string, prefix_key: string, suffix_key: string, background_color: string, text_color: string }
+  ): LabelItem {
+    return new LabelItem(id, text, prefix_key, suffix_key, background_color, text_color)
+  }
+
+  get name(): string {
+    return this.text
+  }
+
+  toObject(): Object {
+    return {
+      id: this.id,
+      text: this.text,
+      prefixKey: this.prefixKey,
+      suffixKey: this.suffixKey,
+      backgroundColor: this.backgroundColor,
+      textColor: this.textColor
+    }
+  }
+}