release: 0.1.0

src/data.ts

@@ -0,0 +1,64 @@
+import { RegExes } from './constants'
+import type { AxiosInstance } from 'axios'
+import { decode } from 'iconv-lite'
+
+interface Data {
+  mainRoute: string
+  searchRoute: string
+  timetableRoute: string
+
+  teacherCode: string
+  dayCode: string
+  subjectCode: string
+}
+
+export default class DataManager {
+  private _data: Data | null = null
+
+  private _lastFetch = 0
+
+  constructor(private readonly rest: AxiosInstance) {}
+
+  private async fetchData(): Promise<Data> {
+    const res = await this.rest.get('/st', {
+      responseType: 'arraybuffer',
+    })
+    const data = decode(Buffer.from(res.data), 'euc-kr')
+
+    const main = RegExes.MainRoute.exec(data)
+    if (!main) throw new Error('Failed to fetch main route')
+
+    const search = RegExes.SearchRoute.exec(data)
+    if (!search) throw new Error('Failed to fetch search route')
+
+    const timetable = RegExes.TimetableRoute.exec(data)
+    if (!timetable) throw new Error('Failed to fetch timetable route')
+
+    const teacher = RegExes.TeacherCode.exec(data)
+    if (!teacher) throw new Error('Failed to fetch teacher code')
+
+    const day = RegExes.DayCode.exec(data)
+    if (!day) throw new Error('Failed to fetch day code')
+
+    const subject = RegExes.SubjectCode.exec(data)
+    if (!subject) throw new Error('Failed to fetch subject code')
+
+    this._lastFetch = Date.now()
+    this._data = {
+      mainRoute: main[0],
+      searchRoute: search[0],
+      timetableRoute: timetable[0],
+      teacherCode: teacher[0],
+      dayCode: day[0],
+      subjectCode: subject[0],
+    }
+    return this._data
+  }
+
+  async getData() {
+    if (this._data && Date.now() - this._lastFetch < 1000 * 60 * 60)
+      return this._data
+
+    return this.fetchData()
+  }
+}