@nestjs/schematics
Version:
Nest - modern, fast, powerful node.js web framework (@schematics)
69 lines (68 loc) • 2.39 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.JSONFile = void 0;
const jsonc_parser_1 = require("jsonc-parser");
class JSONFile {
constructor(host, path) {
this.host = host;
this.path = path;
const buffer = this.host.read(this.path);
if (buffer) {
this.content = buffer.toString();
}
else {
throw new Error(`Could not read '${path}'.`);
}
}
get JsonAst() {
if (this._jsonAst) {
return this._jsonAst;
}
const errors = [];
this._jsonAst = (0, jsonc_parser_1.parseTree)(this.content, errors, {
allowTrailingComma: true,
});
if (errors.length) {
const { error, offset } = errors[0];
throw new Error(`Failed to parse "${this.path}" as JSON AST Object. ${(0, jsonc_parser_1.printParseErrorCode)(error)} at location: ${offset}.`);
}
return this._jsonAst;
}
get(jsonPath) {
const jsonAstNode = this.JsonAst;
if (!jsonAstNode) {
return undefined;
}
if (jsonPath.length === 0) {
return (0, jsonc_parser_1.getNodeValue)(jsonAstNode);
}
const node = (0, jsonc_parser_1.findNodeAtLocation)(jsonAstNode, jsonPath);
return node === undefined ? undefined : (0, jsonc_parser_1.getNodeValue)(node);
}
modify(jsonPath, value, insertInOrder) {
let getInsertionIndex;
if (insertInOrder === undefined) {
const property = jsonPath.slice(-1)[0];
getInsertionIndex = (properties) => [...properties, property].sort().findIndex((p) => p === property);
}
else if (insertInOrder !== false) {
getInsertionIndex = insertInOrder;
}
const edits = (0, jsonc_parser_1.modify)(this.content, jsonPath, value, {
getInsertionIndex,
formattingOptions: {
insertSpaces: true,
tabSize: 2,
},
});
this.content = (0, jsonc_parser_1.applyEdits)(this.content, edits);
this.host.overwrite(this.path, this.content);
this._jsonAst = undefined;
}
remove(jsonPath) {
if (this.get(jsonPath) !== undefined) {
this.modify(jsonPath, undefined);
}
}
}
exports.JSONFile = JSONFile;