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node_modules/moment/src/lib/create/from-string-and-format.js

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+import { configFromISO, configFromRFC2822 } from './from-string';
+import { configFromArray } from './from-array';
+import { getParseRegexForToken } from '../parse/regex';
+import { addTimeToArrayFromToken } from '../parse/token';
+import {
+    expandFormat,
+    formatTokenFunctions,
+    formattingTokens,
+} from '../format/format';
+import checkOverflow from './check-overflow';
+import { YEAR, HOUR } from '../units/constants';
+import { hooks } from '../utils/hooks';
+import getParsingFlags from './parsing-flags';
+
+// constant that refers to the ISO standard
+hooks.ISO_8601 = function () {};
+
+// constant that refers to the RFC 2822 form
+hooks.RFC_2822 = function () {};
+
+// date from string and format string
+export function configFromStringAndFormat(config) {
+    // TODO: Move this to another part of the creation flow to prevent circular deps
+    if (config._f === hooks.ISO_8601) {
+        configFromISO(config);
+        return;
+    }
+    if (config._f === hooks.RFC_2822) {
+        configFromRFC2822(config);
+        return;
+    }
+    config._a = [];
+    getParsingFlags(config).empty = true;
+
+    // This array is used to make a Date, either with `new Date` or `Date.UTC`
+    var string = '' + config._i,
+        i,
+        parsedInput,
+        tokens,
+        token,
+        skipped,
+        stringLength = string.length,
+        totalParsedInputLength = 0,
+        era,
+        tokenLen;
+
+    tokens =
+        expandFormat(config._f, config._locale).match(formattingTokens) || [];
+    tokenLen = tokens.length;
+    for (i = 0; i < tokenLen; i++) {
+        token = tokens[i];
+        parsedInput = (string.match(getParseRegexForToken(token, config)) ||
+            [])[0];
+        if (parsedInput) {
+            skipped = string.substr(0, string.indexOf(parsedInput));
+            if (skipped.length > 0) {
+                getParsingFlags(config).unusedInput.push(skipped);
+            }
+            string = string.slice(
+                string.indexOf(parsedInput) + parsedInput.length
+            );
+            totalParsedInputLength += parsedInput.length;
+        }
+        // don't parse if it's not a known token
+        if (formatTokenFunctions[token]) {
+            if (parsedInput) {
+                getParsingFlags(config).empty = false;
+            } else {
+                getParsingFlags(config).unusedTokens.push(token);
+            }
+            addTimeToArrayFromToken(token, parsedInput, config);
+        } else if (config._strict && !parsedInput) {
+            getParsingFlags(config).unusedTokens.push(token);
+        }
+    }
+
+    // add remaining unparsed input length to the string
+    getParsingFlags(config).charsLeftOver =
+        stringLength - totalParsedInputLength;
+    if (string.length > 0) {
+        getParsingFlags(config).unusedInput.push(string);
+    }
+
+    // clear _12h flag if hour is <= 12
+    if (
+        config._a[HOUR] <= 12 &&
+        getParsingFlags(config).bigHour === true &&
+        config._a[HOUR] > 0
+    ) {
+        getParsingFlags(config).bigHour = undefined;
+    }
+
+    getParsingFlags(config).parsedDateParts = config._a.slice(0);
+    getParsingFlags(config).meridiem = config._meridiem;
+    // handle meridiem
+    config._a[HOUR] = meridiemFixWrap(
+        config._locale,
+        config._a[HOUR],
+        config._meridiem
+    );
+
+    // handle era
+    era = getParsingFlags(config).era;
+    if (era !== null) {
+        config._a[YEAR] = config._locale.erasConvertYear(era, config._a[YEAR]);
+    }
+
+    configFromArray(config);
+    checkOverflow(config);
+}
+
+function meridiemFixWrap(locale, hour, meridiem) {
+    var isPm;
+
+    if (meridiem == null) {
+        // nothing to do
+        return hour;
+    }
+    if (locale.meridiemHour != null) {
+        return locale.meridiemHour(hour, meridiem);
+    } else if (locale.isPM != null) {
+        // Fallback
+        isPm = locale.isPM(meridiem);
+        if (isPm && hour < 12) {
+            hour += 12;
+        }
+        if (!isPm && hour === 12) {
+            hour = 0;
+        }
+        return hour;
+    } else {
+        // this is not supposed to happen
+        return hour;
+    }
+}