fix: Add plugin objectSupport (#887)

Author: zerooverture

src/plugin/objectSupport/index.js

@@ -0,0 +1,63 @@
+export default (o, c) => {
+  const proto = c.prototype
+  const isObject = obj => !(obj instanceof Date) && !(obj instanceof Array) && obj instanceof Object
+  const prettyUnit = (u) => {
+    const unit = proto.$utils().p(u)
+    return unit === 'date' ? 'day' : unit
+  }
+  const parseDate = (cfg) => {
+    const { date, utc } = cfg
+    const $d = {}
+    if (isObject(date)) {
+      Object.keys(date).forEach((k) => {
+        $d[prettyUnit(k)] = date[k]
+      })
+      const y = $d.year || 1970
+      const M = $d.month - 1 || 0
+      const d = $d.day || 1
+      const h = $d.hour || 0
+      const m = $d.minute || 0
+      const s = $d.second || 0
+      const ms = $d.millisecond || 0
+      if (utc) {
+        return new Date(Date.UTC(y, M, d, h, m, s, ms))
+      }
+      return new Date(y, M, d, h, m, s, ms)
+    }
+    return date
+  }
+
+  const oldParse = proto.parse
+  proto.parse = function (cfg) {
+    cfg.date = parseDate.bind(this)(cfg)
+    oldParse.bind(this)(cfg)
+  }
+
+  const oldSet = proto.set
+  const oldAdd = proto.add
+
+  const callObject = function (call, argument, string, offset = 1) {
+    if (argument instanceof Object) {
+      const keys = Object.keys(argument)
+      let chain = this
+      keys.forEach((key) => {
+        chain = call.bind(chain)(argument[key] * offset, key)
+      })
+      return chain
+    }
+    return call.bind(this)(argument * offset, string)
+  }
+
+  proto.set = function (string, int) {
+    int = int === undefined ? string : int
+    return callObject.bind(this)(function (i, s) {
+      return oldSet.bind(this)(s, i)
+    }, int, string)
+  }
+  proto.add = function (number, string) {
+    return callObject.bind(this)(oldAdd, number, string)
+  }
+  proto.subtract = function (number, string) {
+    return callObject.bind(this)(oldAdd, number, string, -1)
+  }
+}