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gorhillgorhill
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Add json-edit-related scriptlets
edit-outbound-object-.js @description Prune properties from an object returned by a specific method. Properties can only be removed. @param jsonq A uBO-flavored JSONPath query. trusted-edit-outbound-object.js @description Edit properties from an object returned by a specific method. Properties can be assigned new values. @param jsonq A uBO-flavored JSONPath query. json-edit-xhr-request.js @description Edit the object sent as the body in a XHR instance. Properties can only be removed. @param jsonq A uBO-flavored JSONPath query. @param [propsToMatch, value] An optional vararg detailing the arguments to match when xhr.open() is called. trusted-json-edit-xhr-request.js @description Edit the object sent as the body in a XHR instance. Properties can be assigned new values. @param jsonq A uBO-flavored JSONPath query. @param [propsToMatch, value] An optional vararg detailing the arguments to match when xhr.open() is called. json-edit-fetch-request.js @description Edit the request body sent through the fetch API. Properties can only be removed. @param jsonq A uBO-flavored JSONPath query. @param [propsToMatch, value] An optional vararg detailing the arguments to match when fetch() is called. trusted-json-edit-fetch-request.js @description Edit the request body sent through the fetch API. Properties can be assigned new values. @param jsonq A uBO-flavored JSONPath query. @param [propsToMatch, value] An optional vararg detailing the arguments to match when fetch() is called.
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‎src/js/jsonpath.js‎

Lines changed: 19 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -99,6 +99,10 @@ export class JSONPath {
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const r = this.#compile(query, 0);
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if ( r === undefined ) { return; }
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if ( r.i !== query.length ) {
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if ( query.startsWith('+=', r.i) ) {
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r.modify = '+';
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r.i += 1;
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}
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if ( query.startsWith('=', r.i) === false ) { return; }
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try { r.rval = JSON.parse(query.slice(r.i+1)); }
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catch { return; }
@@ -114,15 +118,19 @@ export class JSONPath {
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}
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apply(root) {
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if ( this.valid === false ) { return 0; }
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const { rval } = this.#compiled;
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const { modify, rval } = this.#compiled;
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this.#root = root;
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const paths = this.#evaluate(this.#compiled.steps, []);
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const n = paths.length;
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let i = n;
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while ( i-- ) {
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const { obj, key } = this.#resolvePath(paths[i]);
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if ( rval !== undefined ) {
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obj[key] = rval;
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if ( modify === '+' ) {
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this.#modifyVal(obj, key, rval);
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} else {
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obj[key] = rval;
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}
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} else if ( Array.isArray(obj) && typeof key === 'number' ) {
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obj.splice(key, 1);
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} else {
@@ -450,4 +458,13 @@ export class JSONPath {
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}
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if ( outcome ) { return k; }
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}
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#modifyVal(obj, key, rval) {
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const lval = obj[key];
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if ( rval instanceof Object === false ) { return; }
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if ( lval instanceof Object === false ) { return; }
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if ( Array.isArray(lval) ) { return; }
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for ( const [ k, v ] of Object.entries(rval) ) {
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lval[k] = v;
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}
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}
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}

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