@yusufkandemir/eslint-plugin-lodash-template/lib/processors/utils/messages.js

ESLint plugin for John Resig-style micro template, Lodash's template, Underscore's template and EJS.

"use strict";

/**
 * Message to string
 * @param {*} message message
 */
function messageToString(message) {
    return `${message.ruleId}:${message.line}:${message.column}:${message.endLine}:${message.endColumn}`;
}

module.exports = {
    /**
     * Filter duplicate messages.
     * @param {Array<Array>} messages The base messages.
     * @returns {Array} messages The filtered messages.
     */
    filterDuplicateMessages(messages) {
        const dup = new Set();
        for (const message of messages[0]) {
            const key = messageToString(message);
            dup.add(key);
        }
        const results = [messages[0]];
        for (const msgs of messages.slice(1)) {
            const result = [];
            for (const message of msgs) {
                const key = messageToString(message);
                if (!dup.has(key)) {
                    result.push(message);
                    dup.add(key);
                }
            }
            results.push(result);
        }
        return results;
    },
    /**
     * Filter duplicate messages.
     * @param {Array<Array>} messages The base messages.
     * @returns {Array} messages The filtered messages.
     */
    groupingMessages(messages) {
        const map = new Map();
        for (const msgs of messages) {
            for (const message of msgs) {
                const key = messageToString(message);
                let arr = map.get(key);
                if (!arr) {
                    arr = [];
                    map.set(key, arr);
                }
                arr.push(message);
            }
        }
        return map;
    },
};