65 lines
1.8 KiB
TypeScript
65 lines
1.8 KiB
TypeScript
import { ParserError } from "../util/errors.js";
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import type { FileInfo } from "../types/index.js";
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import type { Plugin } from "../types/index.js";
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export default {
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/**
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* The order that this parser will run, in relation to other parsers.
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*/
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order: 100,
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/**
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* Whether to allow "empty" files. This includes zero-byte files, as well as empty JSON objects.
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*/
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allowEmpty: true,
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/**
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* Determines whether this parser can parse a given file reference.
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* Parsers that match will be tried, in order, until one successfully parses the file.
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* Parsers that don't match will be skipped, UNLESS none of the parsers match, in which case
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* every parser will be tried.
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*/
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canParse: ".json",
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/**
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* Allow JSON files with byte order marks (BOM)
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*/
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allowBOM: true,
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/**
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* Parses the given file as JSON
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*/
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async parse(file: FileInfo): Promise<object | undefined> {
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let data = file.data;
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if (Buffer.isBuffer(data)) {
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data = data.toString();
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}
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if (typeof data === "string") {
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if (data.trim().length === 0) {
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return; // This mirrors the YAML behavior
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} else {
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try {
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return JSON.parse(data);
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} catch (e: any) {
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if (this.allowBOM) {
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try {
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// find the first curly brace
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const firstCurlyBrace = data.indexOf("{");
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// remove any characters before the first curly brace
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data = data.slice(firstCurlyBrace);
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return JSON.parse(data);
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} catch (e: any) {
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throw new ParserError(e.message, file.url);
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}
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}
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throw new ParserError(e.message, file.url);
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}
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}
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} else {
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// data is already a JavaScript value (object, array, number, null, NaN, etc.)
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return data as object;
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}
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},
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} as Plugin;
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