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Current File : /var/www/vhosts/pcu.in.th/api-uat.pcu.in.th/node_modules/eslint/lib/rules//no-irregular-whitespace.js
/**
 * @fileoverview Rule to disallow whitespace that is not a tab or space, whitespace inside strings and comments are allowed
 * @author Jonathan Kingston
 * @author Christophe Porteneuve
 */

"use strict";

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

const astUtils = require("./utils/ast-utils");

//------------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------------

const ALL_IRREGULARS = /[\f\v\u0085\ufeff\u00a0\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u202f\u205f\u3000\u2028\u2029]/u;
const IRREGULAR_WHITESPACE = /[\f\v\u0085\ufeff\u00a0\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u202f\u205f\u3000]+/mgu;
const IRREGULAR_LINE_TERMINATORS = /[\u2028\u2029]/mgu;
const LINE_BREAK = astUtils.createGlobalLinebreakMatcher();

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

/** @type {import('../shared/types').Rule} */
module.exports = {
    meta: {
        type: "problem",

        docs: {
            description: "Disallow irregular whitespace",
            recommended: true,
            url: "https://eslint.org/docs/latest/rules/no-irregular-whitespace"
        },

        schema: [
            {
                type: "object",
                properties: {
                    skipComments: {
                        type: "boolean",
                        default: false
                    },
                    skipStrings: {
                        type: "boolean",
                        default: true
                    },
                    skipTemplates: {
                        type: "boolean",
                        default: false
                    },
                    skipRegExps: {
                        type: "boolean",
                        default: false
                    },
                    skipJSXText: {
                        type: "boolean",
                        default: false
                    }
                },
                additionalProperties: false
            }
        ],

        messages: {
            noIrregularWhitespace: "Irregular whitespace not allowed."
        }
    },

    create(context) {

        // Module store of errors that we have found
        let errors = [];

        // Lookup the `skipComments` option, which defaults to `false`.
        const options = context.options[0] || {};
        const skipComments = !!options.skipComments;
        const skipStrings = options.skipStrings !== false;
        const skipRegExps = !!options.skipRegExps;
        const skipTemplates = !!options.skipTemplates;
        const skipJSXText = !!options.skipJSXText;

        const sourceCode = context.sourceCode;
        const commentNodes = sourceCode.getAllComments();

        /**
         * Removes errors that occur inside the given node
         * @param {ASTNode} node to check for matching errors.
         * @returns {void}
         * @private
         */
        function removeWhitespaceError(node) {
            const locStart = node.loc.start;
            const locEnd = node.loc.end;

            errors = errors.filter(({ loc: { start: errorLocStart } }) => (
                errorLocStart.line < locStart.line ||
                errorLocStart.line === locStart.line && errorLocStart.column < locStart.column ||
                errorLocStart.line === locEnd.line && errorLocStart.column >= locEnd.column ||
                errorLocStart.line > locEnd.line
            ));
        }

        /**
         * Checks literal nodes for errors that we are choosing to ignore and calls the relevant methods to remove the errors
         * @param {ASTNode} node to check for matching errors.
         * @returns {void}
         * @private
         */
        function removeInvalidNodeErrorsInLiteral(node) {
            const shouldCheckStrings = skipStrings && (typeof node.value === "string");
            const shouldCheckRegExps = skipRegExps && Boolean(node.regex);

            if (shouldCheckStrings || shouldCheckRegExps) {

                // If we have irregular characters remove them from the errors list
                if (ALL_IRREGULARS.test(node.raw)) {
                    removeWhitespaceError(node);
                }
            }
        }

        /**
         * Checks template string literal nodes for errors that we are choosing to ignore and calls the relevant methods to remove the errors
         * @param {ASTNode} node to check for matching errors.
         * @returns {void}
         * @private
         */
        function removeInvalidNodeErrorsInTemplateLiteral(node) {
            if (typeof node.value.raw === "string") {
                if (ALL_IRREGULARS.test(node.value.raw)) {
                    removeWhitespaceError(node);
                }
            }
        }

        /**
         * Checks comment nodes for errors that we are choosing to ignore and calls the relevant methods to remove the errors
         * @param {ASTNode} node to check for matching errors.
         * @returns {void}
         * @private
         */
        function removeInvalidNodeErrorsInComment(node) {
            if (ALL_IRREGULARS.test(node.value)) {
                removeWhitespaceError(node);
            }
        }

        /**
         * Checks JSX nodes for errors that we are choosing to ignore and calls the relevant methods to remove the errors
         * @param {ASTNode} node to check for matching errors.
         * @returns {void}
         * @private
         */
        function removeInvalidNodeErrorsInJSXText(node) {
            if (ALL_IRREGULARS.test(node.raw)) {
                removeWhitespaceError(node);
            }
        }

        /**
         * Checks the program source for irregular whitespace
         * @param {ASTNode} node The program node
         * @returns {void}
         * @private
         */
        function checkForIrregularWhitespace(node) {
            const sourceLines = sourceCode.lines;

            sourceLines.forEach((sourceLine, lineIndex) => {
                const lineNumber = lineIndex + 1;
                let match;

                while ((match = IRREGULAR_WHITESPACE.exec(sourceLine)) !== null) {
                    errors.push({
                        node,
                        messageId: "noIrregularWhitespace",
                        loc: {
                            start: {
                                line: lineNumber,
                                column: match.index
                            },
                            end: {
                                line: lineNumber,
                                column: match.index + match[0].length
                            }
                        }
                    });
                }
            });
        }

        /**
         * Checks the program source for irregular line terminators
         * @param {ASTNode} node The program node
         * @returns {void}
         * @private
         */
        function checkForIrregularLineTerminators(node) {
            const source = sourceCode.getText(),
                sourceLines = sourceCode.lines,
                linebreaks = source.match(LINE_BREAK);
            let lastLineIndex = -1,
                match;

            while ((match = IRREGULAR_LINE_TERMINATORS.exec(source)) !== null) {
                const lineIndex = linebreaks.indexOf(match[0], lastLineIndex + 1) || 0;

                errors.push({
                    node,
                    messageId: "noIrregularWhitespace",
                    loc: {
                        start: {
                            line: lineIndex + 1,
                            column: sourceLines[lineIndex].length
                        },
                        end: {
                            line: lineIndex + 2,
                            column: 0
                        }
                    }
                });

                lastLineIndex = lineIndex;
            }
        }

        /**
         * A no-op function to act as placeholder for comment accumulation when the `skipComments` option is `false`.
         * @returns {void}
         * @private
         */
        function noop() {}

        const nodes = {};

        if (ALL_IRREGULARS.test(sourceCode.getText())) {
            nodes.Program = function(node) {

                /*
                 * As we can easily fire warnings for all white space issues with
                 * all the source its simpler to fire them here.
                 * This means we can check all the application code without having
                 * to worry about issues caused in the parser tokens.
                 * When writing this code also evaluating per node was missing out
                 * connecting tokens in some cases.
                 * We can later filter the errors when they are found to be not an
                 * issue in nodes we don't care about.
                 */
                checkForIrregularWhitespace(node);
                checkForIrregularLineTerminators(node);
            };

            nodes.Literal = removeInvalidNodeErrorsInLiteral;
            nodes.TemplateElement = skipTemplates ? removeInvalidNodeErrorsInTemplateLiteral : noop;
            nodes.JSXText = skipJSXText ? removeInvalidNodeErrorsInJSXText : noop;
            nodes["Program:exit"] = function() {
                if (skipComments) {

                    // First strip errors occurring in comment nodes.
                    commentNodes.forEach(removeInvalidNodeErrorsInComment);
                }

                // If we have any errors remaining report on them
                errors.forEach(error => context.report(error));
            };
        } else {
            nodes.Program = noop;
        }

        return nodes;
    }
};

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