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20220330_Vote/Ewide.Web.Entry/wwwroot/lib/xe-utils/toStringDate.js

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+var staticParseInt = require('./staticParseInt')
+
+var helperGetUTCDateTime = require('./helperGetUTCDateTime')
+var helperGetDateTime = require('./helperGetDateTime')
+
+var isString = require('./isString')
+var isDate = require('./isDate')
+
+function getParseRule (txt) {
+  return '(\\d{' + txt + '})'
+}
+
+function toParseMs (num) {
+  if (num < 10) {
+    return num * 100
+  } else if (num < 100) {
+    return num * 10
+  }
+  return num
+}
+
+function toParseNum (num) {
+  return isNaN(num) ? num : staticParseInt(num)
+}
+
+var d2 = getParseRule(2)
+var d1or2 = getParseRule('1,2')
+var d1or7 = getParseRule('1,7')
+var d3or4 = getParseRule('3,4')
+var place = '.{1}'
+var d1Or2RE = place + d1or2
+var dzZ = '(([zZ])|([-+]\\d{2}:?\\d{2}))'
+
+var defaulParseStrs = [d3or4, d1Or2RE, d1Or2RE, d1Or2RE, d1Or2RE, d1Or2RE, place + d1or7, dzZ]
+var defaulParseREs = []
+
+for (var len = defaulParseStrs.length - 1; len >= 0; len--) {
+  var rule = ''
+  for (var i = 0; i < len + 1; i++) {
+    rule += defaulParseStrs[i]
+  }
+  defaulParseREs.push(new RegExp('^' + rule + '$'))
+}
+
+/**
+ * 解析默认格式
+ */
+function parseDefaultRules (str) {
+  var matchRest, resMaps = {}
+  for (var i = 0, dfrLen = defaulParseREs.length; i < dfrLen; i++) {
+    matchRest = str.match(defaulParseREs[i])
+    if (matchRest) {
+      resMaps.y = matchRest[1]
+      resMaps.M = matchRest[2]
+      resMaps.d = matchRest[3]
+      resMaps.H = matchRest[4]
+      resMaps.m = matchRest[5]
+      resMaps.s = matchRest[6]
+      resMaps.S = matchRest[7]
+      resMaps.Z = matchRest[8]
+      break
+    }
+  }
+  return resMaps
+}
+
+var customParseStrs = [
+  ['yyyy', d3or4],
+  ['yy', d2],
+  ['MM', d2],
+  ['M', d1or2],
+  ['dd', d2],
+  ['d', d1or2],
+  ['HH', d2],
+  ['H', d1or2],
+  ['mm', d2],
+  ['m', d1or2],
+  ['ss', d2],
+  ['s', d1or2],
+  ['SSS', getParseRule(3)],
+  ['S', d1or7],
+  ['Z', dzZ]
+]
+var parseRuleMaps = {}
+var parseRuleKeys = ['\\[([^\\]]+)\\]']
+
+for (var i = 0; i < customParseStrs.length; i++) {
+  var itemRule = customParseStrs[i]
+  parseRuleMaps[itemRule[0]] = itemRule[1] + '?'
+  parseRuleKeys.push(itemRule[0])
+}
+
+var customParseRes = new RegExp(parseRuleKeys.join('|'), 'g')
+var cacheFormatMaps = {}
+
+/**
+ * 解析自定义格式
+ */
+function parseCustomRules (str, format) {
+  var cacheItem = cacheFormatMaps[format]
+  if (!cacheItem) {
+    var posIndexs = []
+    var re = format.replace(/([$(){}*+.?\\^|])/g, "\\$1").replace(customParseRes, function (text, val) {
+      var firstChar = text.charAt(0)
+      // 如果为转义符号:[关键字]
+      if (firstChar === '[') {
+        return val
+      }
+      posIndexs.push(firstChar)
+      return parseRuleMaps[text]
+    })
+    cacheItem = cacheFormatMaps[format] = {
+      _i: posIndexs,
+      _r: new RegExp(re)
+    }
+  }
+  var resMaps = {}
+  var matchRest = str.match(cacheItem._r)
+  if (matchRest) {
+    var _i = cacheItem._i
+    for (var i = 1, len = matchRest.length; i < len; i++) {
+      resMaps[_i[i - 1]] = matchRest[i]
+    }
+    return resMaps
+  }
+  return resMaps
+}
+
+/**
+ * 解析时区
+ */
+function parseTimeZone (resMaps) {
+  // 如果为UTC 时间
+  if (/^[zZ]/.test(resMaps.Z)) {
+    return new Date(helperGetUTCDateTime(resMaps))
+  } else {
+    // 如果指定时区，时区转换
+    var matchRest = resMaps.Z.match(/([-+])(\d{2}):?(\d{2})/)
+    if (matchRest) {
+      return new Date(helperGetUTCDateTime(resMaps) - (matchRest[1] === '-' ? -1 : 1) * staticParseInt(matchRest[2]) * 3600000 + staticParseInt(matchRest[3]) * 60000)
+    }
+  }
+  return new Date('')
+}
+
+/**
+  * 字符串转为日期
+  *
+  * @param {String/Number/Date} str 日期或数字
+  * @param {String} format 解析日期格式(yyyy年份、MM月份、dd天、hh(12)HH(24)小时、mm分钟、ss秒、SSS毫秒、Z时区)
+  * @return {Date}
+  */
+function toStringDate (str, format) {
+  if (str) {
+    var isDType = isDate(str)
+    if (isDType || (!format && /^[0-9]{11,15}$/.test(str))) {
+      return new Date(isDType ? helperGetDateTime(str) : staticParseInt(str))
+    }
+    if (isString(str)) {
+      var resMaps = format ? parseCustomRules(str, format) : parseDefaultRules(str)
+      if (resMaps.y) {
+        if (resMaps.M) {
+          resMaps.M = toParseNum(resMaps.M) - 1
+        }
+        if (resMaps.S) {
+          // 如果7位则是微秒，只精确到3位毫秒
+          resMaps.S = toParseMs(toParseNum(resMaps.S.substring(0, 3)))
+        }
+        if (resMaps.Z) {
+          return parseTimeZone(resMaps)
+        } else {
+          return new Date(resMaps.y, resMaps.M || 0, resMaps.d || 1, resMaps.H || 0, resMaps.m || 0, resMaps.s || 0, resMaps.S || 0)
+        }
+      }
+    }
+  }
+  return new Date('')
+}
+
+module.exports = toStringDate