function localeWeekdaysParse()

in charts/shared/moment.js [1640:1705]
62 lines of code
19 McCabe index (conditional complexity)

function localeWeekdaysParse(weekdayName, format, strict) {
    var i, mom, regex;

    if (this._weekdaysParseExact) {
        return handleStrictParse$1.call(this, weekdayName, format, strict);
    }

    if (!this._weekdaysParse) {
        this._weekdaysParse = [];
        this._minWeekdaysParse = [];
        this._shortWeekdaysParse = [];
        this._fullWeekdaysParse = [];
    }

    for (i = 0; i < 7; i++) {
        // make the regex if we don't have it already

        mom = createUTC([2000, 1]).day(i);
        if (strict && !this._fullWeekdaysParse[i]) {
            this._fullWeekdaysParse[i] = new RegExp(
                '^' + this.weekdays(mom, '').replace('.', '\\.?') + '$',
                'i'
            );
            this._shortWeekdaysParse[i] = new RegExp(
                '^' + this.weekdaysShort(mom, '').replace('.', '\\.?') + '$',
                'i'
            );
            this._minWeekdaysParse[i] = new RegExp(
                '^' + this.weekdaysMin(mom, '').replace('.', '\\.?') + '$',
                'i'
            );
        }
        if (!this._weekdaysParse[i]) {
            regex =
                '^' +
                this.weekdays(mom, '') +
                '|^' +
                this.weekdaysShort(mom, '') +
                '|^' +
                this.weekdaysMin(mom, '');
            this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
        }
        // test the regex
        if (
            strict &&
            format === 'dddd' &&
            this._fullWeekdaysParse[i].test(weekdayName)
        ) {
            return i;
        } else if (
            strict &&
            format === 'ddd' &&
            this._shortWeekdaysParse[i].test(weekdayName)
        ) {
            return i;
        } else if (
            strict &&
            format === 'dd' &&
            this._minWeekdaysParse[i].test(weekdayName)
        ) {
            return i;
        } else if (!strict && this._weekdaysParse[i].test(weekdayName)) {
            return i;
        }
    }
}