41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports._errorMessages = exports.commonMaxIndentLength = void 0;
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/**
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* @description
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* It returns the common maximum indentation length among the lines of the
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* provided string. Lines that are only spaces are not taken into account.
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*
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* It throws error if a `\s` character that is not ` ` (space) is encountered
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* in the indentation.
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* @example
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* commonMinIndentLength(
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* ` hello
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* world!
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* `);
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* //returns
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* 3;
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*/
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function commonMaxIndentLength(s) {
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let minIndentLength = Infinity;
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s.split("\n").forEach((line) => {
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if (/^[ ]+$/.test(line) || line.length === 0)
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return;
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let newMinIndentLength = 0;
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for (let i = 0; i < line.length; i++) {
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if (/\s/.test(line[i]) && line[i] !== " ")
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throw Error(exports._errorMessages.badIndentSpaceCharacter);
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if (line[i] !== " ")
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break;
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newMinIndentLength++;
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}
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if (newMinIndentLength < minIndentLength)
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minIndentLength = newMinIndentLength;
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});
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return minIndentLength;
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}
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exports.commonMaxIndentLength = commonMaxIndentLength;
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exports._errorMessages = {
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badIndentSpaceCharacter: "Only space characters are allowed in the indented part of the string",
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};
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