Date manager refactor

src/services/dateService.ts

@@ -0,0 +1,45 @@
+interface TimeComponents {
+  hours: number
+  minutes: number
+}
+
+export class DateService {
+  public parseTimeString(timeString: string): Date | null {
+    const timeRegex = /^(\d{1,2}):(\d{2})(?::\d{2})?$/
+    const match = timeString.match(timeRegex)
+
+    if (match && match[1] && match[2]) {
+      const components: TimeComponents = {
+        hours: parseInt(match[1], 10),
+        minutes: parseInt(match[2], 10)
+      }
+
+      return this.isValidTimeComponents(components) ? this.createDateWithComponents(components, new Date()) : null
+    }
+
+    return this.parseFullDate(timeString)
+  }
+
+  public isValidTimeComponents(components: TimeComponents): boolean {
+    const { hours, minutes } = components
+    return hours >= 0 && hours < 24 && minutes >= 0 && minutes < 60
+  }
+
+  public createDateWithComponents(components: TimeComponents, baseDate: Date): Date {
+    const { hours, minutes } = components
+    const newDate = new Date(baseDate)
+    newDate.setHours(hours, minutes, 0, 0)
+    return newDate
+  }
+
+  public parseFullDate(dateString: string): Date | null {
+    const date = new Date(dateString)
+    return isNaN(date.getTime()) ? null : date
+  }
+
+  public calculateGameTimeAdvance(gameSpeed: number, updateInterval: number): number {
+    return gameSpeed * updateInterval
+  }
+}
+
+export default new DateService()