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81 lines
2.6 KiB
81 lines
2.6 KiB
const NUMBER_CHAR_RE = /\d/;
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const STR_SPLITTERS = ["-", "_", "/", "."];
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function isUppercase(char = "") {
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if (NUMBER_CHAR_RE.test(char)) {
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return void 0;
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}
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return char !== char.toLowerCase();
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}
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function splitByCase(str, separators) {
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const splitters = separators ?? STR_SPLITTERS;
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const parts = [];
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if (!str || typeof str !== "string") {
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return parts;
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}
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let buff = "";
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let previousUpper;
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let previousSplitter;
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for (const char of str) {
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const isSplitter = splitters.includes(char);
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if (isSplitter === true) {
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parts.push(buff);
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buff = "";
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previousUpper = void 0;
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continue;
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}
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const isUpper = isUppercase(char);
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if (previousSplitter === false) {
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if (previousUpper === false && isUpper === true) {
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parts.push(buff);
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buff = char;
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previousUpper = isUpper;
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continue;
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}
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if (previousUpper === true && isUpper === false && buff.length > 1) {
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const lastChar = buff.at(-1);
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parts.push(buff.slice(0, Math.max(0, buff.length - 1)));
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buff = lastChar + char;
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previousUpper = isUpper;
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continue;
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}
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}
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buff += char;
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previousUpper = isUpper;
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previousSplitter = isSplitter;
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}
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parts.push(buff);
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return parts;
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}
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function upperFirst(str) {
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return str ? str[0].toUpperCase() + str.slice(1) : "";
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}
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function lowerFirst(str) {
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return str ? str[0].toLowerCase() + str.slice(1) : "";
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}
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function pascalCase(str, opts) {
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return str ? (Array.isArray(str) ? str : splitByCase(str)).map((p) => upperFirst(opts?.normalize ? p.toLowerCase() : p)).join("") : "";
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}
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function camelCase(str, opts) {
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return lowerFirst(pascalCase(str || "", opts));
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}
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function kebabCase(str, joiner) {
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return str ? (Array.isArray(str) ? str : splitByCase(str)).map((p) => p.toLowerCase()).join(joiner ?? "-") : "";
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}
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function snakeCase(str) {
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return kebabCase(str || "", "_");
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}
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function flatCase(str) {
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return kebabCase(str || "", "");
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}
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function trainCase(str, opts) {
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return (Array.isArray(str) ? str : splitByCase(str)).filter(Boolean).map((p) => upperFirst(opts?.normalize ? p.toLowerCase() : p)).join("-");
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}
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const titleCaseExceptions = /^(a|an|and|as|at|but|by|for|if|in|is|nor|of|on|or|the|to|with)$/i;
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function titleCase(str, opts) {
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return (Array.isArray(str) ? str : splitByCase(str)).filter(Boolean).map(
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(p) => titleCaseExceptions.test(p) ? p.toLowerCase() : upperFirst(opts?.normalize ? p.toLowerCase() : p)
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).join(" ");
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}
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export { camelCase, flatCase, isUppercase, kebabCase, lowerFirst, pascalCase, snakeCase, splitByCase, titleCase, trainCase, upperFirst };
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