@textlint/kernel/module/src/messages/MessageProcessManager.js

textlint kernel is core logic by pure JavaScript.

// LICENSE : MIT
"use strict";
export default class MessageProcessManager {
    /**
     * Preprossor
     */
    constructor(preProcessors) {
        this._preProcessors = preProcessors || [];
        this._processors = [];
    }
    add(messageProcessor) {
        this._processors.push(messageProcessor);
    }
    remove(process) {
        const index = this._processors.indexOf(process);
        if (index !== -1) {
            this._processors.splice(index, 1);
        }
    }
    /**
     * process `messages` with registered processes
     * @param {TextlintMessage[]} messages
     * @returns {TextlintMessage[]}
     */
    process(messages) {
        const originalMessages = messages;
        if (this._preProcessors.length === 0) {
            throw new Error("pre process should be > 0");
        }
        const preProcessedMesssages = this._preProcessors.reduce((messages, filter) => {
            return filter(messages);
        }, originalMessages);
        if (this._processors.length === 0) {
            return preProcessedMesssages;
        }
        return this._processors.reduce((messages, filter) => {
            return filter(messages);
        }, preProcessedMesssages);
    }
}
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