refactor: SafeEmitter -> SourceCodeVisitor #19708
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| /** | ||
| * @fileoverview SourceCodeVisitor class | ||
| * @author Nicholas C. Zakas | ||
| */ | ||
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| "use strict"; | ||
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| //----------------------------------------------------------------------------- | ||
| // Helpers | ||
| //----------------------------------------------------------------------------- | ||
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| const emptyArray = Object.freeze([]); | ||
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| //------------------------------------------------------------------------------ | ||
| // Exports | ||
| //------------------------------------------------------------------------------ | ||
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| /** | ||
| * A structure to hold a list of functions to call for a given name. | ||
| * This is used to allow multiple rules to register functions for a given name | ||
| * without having to know about each other. | ||
| */ | ||
| class SourceCodeVisitor { | ||
| /** | ||
| * The functions to call for a given name. | ||
| * @type {Map<string, Function[]>} | ||
| */ | ||
| #functions = new Map(); | ||
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| /** | ||
| * Adds a function to the list of functions to call for a given name. | ||
| * @param {string} name The name of the function to call. | ||
| * @param {Function} func The function to call. | ||
| * @returns {void} | ||
| */ | ||
| add(name, func) { | ||
| if (this.#functions.has(name)) { | ||
| this.#functions.get(name).push(func); | ||
| } else { | ||
| this.#functions.set(name, [func]); | ||
| } | ||
| } | ||
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| /** | ||
| * Gets the list of functions to call for a given name. | ||
| * @param {string} name The name of the function to call. | ||
| * @returns {Function[]} The list of functions to call. | ||
| */ | ||
| get(name) { | ||
| if (this.#functions.has(name)) { | ||
| return this.#functions.get(name); | ||
| } | ||
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| return emptyArray; | ||
| } | ||
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| /** | ||
| * Iterates over all names and calls the callback with the name. | ||
| * @param {(name:string) => void} callback The callback to call for each name. | ||
| * @returns {void} | ||
| */ | ||
| forEachName(callback) { | ||
| this.#functions.forEach((funcs, name) => { | ||
| callback(name); | ||
| }); | ||
| } | ||
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| /** | ||
| * Calls the functions for a given name with the given arguments. | ||
| * @param {string} name The name of the function to call. | ||
| * @param {any[]} args The arguments to pass to the function. | ||
| * @returns {void} | ||
| */ | ||
| callSync(name, ...args) { | ||
| if (this.#functions.has(name)) { | ||
| this.#functions.get(name).forEach(func => func(...args)); | ||
| } | ||
| } | ||
| } | ||
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| module.exports = { SourceCodeVisitor }; |
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