json-joy
Version:
Collection of libraries for building collaborative editing apps.
121 lines (120 loc) • 4.27 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.JsonPatchDiff = void 0;
const tslib_1 = require("tslib");
const deepEqual_1 = require("@jsonjoy.com/util/lib/json-equal/deepEqual");
const str = tslib_1.__importStar(require("../util/diff/str"));
const line = tslib_1.__importStar(require("../util/diff/line"));
const json_hash_1 = require("../json-hash");
class JsonPatchDiff {
constructor() {
this.patch = [];
}
diffVal(path, src, dst) {
if ((0, deepEqual_1.deepEqual)(src, dst))
return;
this.patch.push({ op: 'replace', path, value: dst });
}
diffStr(path, src, dst) {
if (src === dst)
return;
const patch = this.patch;
str.apply(str.diff(src, dst), src.length, (pos, str) => patch.push({ op: 'str_ins', path, pos, str }), (pos, len, str) => patch.push({ op: 'str_del', path, pos, len, str }));
}
diffBin(path, src, dst) {
throw new Error('Not implemented');
}
diffObj(path, src, dst) {
const patch = this.patch;
for (const key in src) {
if (key in dst) {
const val1 = src[key];
const val2 = dst[key];
if (val1 === val2)
continue;
this.diffAny(path + '/' + key, val1, val2);
}
else {
patch.push({ op: 'remove', path: path + '/' + key });
}
}
for (const key in dst) {
if (key in src)
continue;
patch.push({ op: 'add', path: path + '/' + key, value: dst[key] });
}
}
diffArr(path, src, dst) {
const srcLines = [];
const dstLines = [];
const srcLen = src.length;
const dstLen = dst.length;
for (let i = 0; i < srcLen; i++)
srcLines.push((0, json_hash_1.structHash)(src[i]));
for (let i = 0; i < dstLen; i++)
dstLines.push((0, json_hash_1.structHash)(dst[i]));
const pfx = path + '/';
const patch = this.patch;
const linePatch = line.diff(srcLines, dstLines);
const length = linePatch.length;
for (let i = length - 1; i >= 0; i--) {
const [type, srcIdx, dstIdx] = linePatch[i];
switch (type) {
case 0 /* line.LINE_PATCH_OP_TYPE.EQL */:
break;
case 2 /* line.LINE_PATCH_OP_TYPE.MIX */: {
const srcValue = src[srcIdx];
const dstValue = dst[dstIdx];
this.diff(pfx + srcIdx, srcValue, dstValue);
break;
}
case 1 /* line.LINE_PATCH_OP_TYPE.INS */:
patch.push({ op: 'add', path: pfx + (srcIdx + 1), value: dst[dstIdx] });
break;
case -1 /* line.LINE_PATCH_OP_TYPE.DEL */:
patch.push({ op: 'remove', path: pfx + srcIdx });
break;
}
}
}
diffAny(path, src, dst) {
switch (typeof src) {
case 'string': {
if (typeof dst === 'string')
this.diffStr(path, src, dst);
else
this.diffVal(path, src, dst);
break;
}
case 'number':
case 'boolean':
case 'bigint': {
this.diffVal(path, src, dst);
break;
}
case 'object': {
if (!src || !dst || typeof dst !== 'object') {
this.diffVal(path, src, dst);
return;
}
if (Array.isArray(src)) {
if (Array.isArray(dst))
this.diffArr(path, src, dst);
else
this.diffVal(path, src, dst);
return;
}
this.diffObj(path, src, dst);
break;
}
default:
this.diffVal(path, src, dst);
break;
}
}
diff(path, src, dst) {
this.diffAny(path, src, dst);
return this.patch;
}
}
exports.JsonPatchDiff = JsonPatchDiff;