feat: add useNow hooks

Author: xingyuv

src/hooks/web/useNow.ts

@@ -0,0 +1,60 @@
+import { dateUtil } from '@/utils/dateUtil'
+import { reactive, toRefs } from 'vue'
+import { tryOnMounted, tryOnUnmounted } from '@vueuse/core'
+
+export const useNow = (immediate = true) => {
+  let timer: IntervalHandle
+
+  const state = reactive({
+    year: 0,
+    month: 0,
+    week: '',
+    day: 0,
+    hour: '',
+    minute: '',
+    second: 0,
+    meridiem: ''
+  })
+
+  const update = () => {
+    const now = dateUtil()
+
+    const h = now.format('HH')
+    const m = now.format('mm')
+    const s = now.get('s')
+
+    state.year = now.get('y')
+    state.month = now.get('M') + 1
+    state.week = '星期' + ['日', '一', '二', '三', '四', '五', '六'][now.day()]
+    state.day = now.get('date')
+    state.hour = h
+    state.minute = m
+    state.second = s
+
+    state.meridiem = now.format('A')
+  }
+
+  function start() {
+    update()
+    clearInterval(timer)
+    timer = setInterval(() => update(), 1000)
+  }
+
+  function stop() {
+    clearInterval(timer)
+  }
+
+  tryOnMounted(() => {
+    immediate && start()
+  })
+
+  tryOnUnmounted(() => {
+    stop()
+  })
+
+  return {
+    ...toRefs(state),
+    start,
+    stop
+  }
+}