json-joy
Version:
Collection of libraries for building collaborative editing apps.
60 lines (59 loc) • 1.86 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.OpRemove = void 0;
const AbstractOp_1 = require("./AbstractOp");
const json_pointer_1 = require("@jsonjoy.com/json-pointer");
const constants_1 = require("../constants");
/**
* @category JSON Patch
*/
class OpRemove extends AbstractOp_1.AbstractOp {
constructor(path, oldValue) {
super(path);
this.oldValue = oldValue;
}
op() {
return 'remove';
}
code() {
return constants_1.OPCODE.remove;
}
apply(doc) {
const ref = (0, json_pointer_1.find)(doc, this.path);
if (ref.val === undefined)
throw new Error('NOT_FOUND');
if ((0, json_pointer_1.isObjectReference)(ref))
delete ref.obj[ref.key];
else if ((0, json_pointer_1.isArrayReference)(ref)) {
if (ref.val !== undefined)
ref.obj.splice(ref.key, 1);
}
else
doc = null;
return { doc, old: ref.val };
}
toJson(parent) {
const json = {
op: 'remove',
path: (0, json_pointer_1.formatJsonPointer)(this.path),
};
if (this.oldValue !== undefined)
json.oldValue = this.oldValue;
return json;
}
toCompact(parent, verbose) {
const opcode = verbose ? 'remove' : constants_1.OPCODE.remove;
return this.oldValue === undefined
? [opcode, this.path]
: [opcode, this.path, this.oldValue];
}
encode(encoder, parent) {
const hasOldValue = this.oldValue !== undefined;
encoder.encodeArrayHeader(hasOldValue ? 3 : 2);
encoder.writer.u8(constants_1.OPCODE.remove);
encoder.encodeArray(this.path);
if (hasOldValue)
encoder.encodeAny(this.oldValue);
}
}
exports.OpRemove = OpRemove;