feat: add custom api model

src/shared/structs/DateOnly.ts

@@ -0,0 +1,45 @@
+export class DateOnly {
+  private ticks: number;
+
+  /*
+  constructor(year: number, month: number, day: number) {
+    this.ticks = new Date(year, month - 1, day).getTime();
+  }
+*/
+
+  constructor(year: number, month: number, day: number);
+  constructor(date: Date);
+  constructor(date: string);
+  constructor(yearOrDate: number | Date | string, month?: number, day?: number) {
+    if (yearOrDate instanceof Date) {
+      this.ticks = yearOrDate.getTime();
+    } else if (typeof yearOrDate === 'number' && month !== undefined && day !== undefined) {
+      this.ticks = new Date(yearOrDate, month - 1, day).getTime();
+    } else if (typeof yearOrDate === 'string') {
+      const [year, month, day] = yearOrDate.split('-').map(Number);
+      this.ticks = new Date(year, month - 1, day).getTime();
+    } else {
+      throw new Error('Invalid constructor arguments');
+    }
+  }
+
+  get year(): number {
+    return new Date(this.ticks).getFullYear();
+  }
+
+  get month(): number {
+    return new Date(this.ticks).getMonth() + 1;
+  }
+
+  get day(): number {
+    return new Date(this.ticks).getDate();
+  }
+
+  get date(): Date {
+    return new Date(this.ticks);
+  }
+
+  toString(): string {
+    return `${this.year}-${String(this.month).padStart(2, '0')}-${String(this.day).padStart(2, '0')}`;
+  }
+}