@uifabric/utilities/lib/initials.js

/**
 * Regular expression matching characters to ignore when calculating the initials.
 */
/**
 * Regular expression matching characters within various types of enclosures, including the enclosures themselves
 *  so for example, (xyz) [xyz] {xyz} all would be ignored
 */
var UNWANTED_ENCLOSURES_REGEX = /[\(\[\{][^\)\]\}]*[\)\]\}]/g;
/**
 * Regular expression matching special ASCII characters except space, plus some unicode special characters.
 * Applies after unwanted enclosures have been removed
 */
var UNWANTED_CHARS_REGEX = /[\0-\u001F\!-/:-@\[-`\{-\u00BF\u0250-\u036F\uD800-\uFFFF]/g;
/**
 * Regular expression matching phone numbers. Applied after chars matching UNWANTED_CHARS_REGEX have been removed
 * and number has been trimmed for whitespaces
 */
var PHONENUMBER_REGEX = /^\d+[\d\s]*(:?ext|x|)\s*\d+$/i;
/** Regular expression matching one or more spaces. */
var MULTIPLE_WHITESPACES_REGEX = /\s+/g;
/**
 * Regular expression matching languages for which we currently don't support initials.
 * Arabic:   Arabic, Arabic Supplement, Arabic Extended-A.
 * Korean:   Hangul Jamo, Hangul Compatibility Jamo, Hangul Jamo Extended-A, Hangul Syllables, Hangul Jamo Extended-B.
 * Japanese: Hiragana, Katakana.
 * CJK:      CJK Unified Ideographs Extension A, CJK Unified Ideographs, CJK Compatibility Ideographs,
 *             CJK Unified Ideographs Extension B
 */
// eslint-disable-next-line @fluentui/max-len
var UNSUPPORTED_TEXT_REGEX = /[\u0600-\u06FF\u0750-\u077F\u08A0-\u08FF\u1100-\u11FF\u3130-\u318F\uA960-\uA97F\uAC00-\uD7AF\uD7B0-\uD7FF\u3040-\u309F\u30A0-\u30FF\u3400-\u4DBF\u4E00-\u9FFF\uF900-\uFAFF]|[\uD840-\uD869][\uDC00-\uDED6]/;
function getInitialsLatin(displayName, isRtl) {
    var initials = '';
    var splits = displayName.split(' ');
    if (splits.length === 2) {
        initials += splits[0].charAt(0).toUpperCase();
        initials += splits[1].charAt(0).toUpperCase();
    }
    else if (splits.length === 3) {
        initials += splits[0].charAt(0).toUpperCase();
        initials += splits[2].charAt(0).toUpperCase();
    }
    else if (splits.length !== 0) {
        initials += splits[0].charAt(0).toUpperCase();
    }
    if (isRtl && initials.length > 1) {
        return initials.charAt(1) + initials.charAt(0);
    }
    return initials;
}
function cleanupDisplayName(displayName) {
    displayName = displayName.replace(UNWANTED_ENCLOSURES_REGEX, '');
    displayName = displayName.replace(UNWANTED_CHARS_REGEX, '');
    displayName = displayName.replace(MULTIPLE_WHITESPACES_REGEX, ' ');
    displayName = displayName.trim();
    return displayName;
}
/**
 * Get (up to 2 characters) initials based on display name of the persona.
 *
 * @public
 */
export function getInitials(displayName, isRtl, allowPhoneInitials) {
    if (!displayName) {
        return '';
    }
    displayName = cleanupDisplayName(displayName);
    // For names containing CJK characters, and phone numbers, we don't display initials
    if (UNSUPPORTED_TEXT_REGEX.test(displayName) || (!allowPhoneInitials && PHONENUMBER_REGEX.test(displayName))) {
        return '';
    }
    return getInitialsLatin(displayName, isRtl);
}
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