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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | 2x 2x 2x 2x 2x 262x 252x 251x 20x 16x 16x 22x 15x 28x 28x 64x 62x 62x 62x 32x 2x 28x 64x 2x 238x 238x 238x 238x 995x 1036x 238x 238x 238x 238x 238x 668x 668x 83x 244x 244x 244x 244x 191x 191x 150x 150x 538x 22x 2x 22x 249x 249x 267x 1x 1x 266x 238x 238x 28x 28x 506x 506x | import {deepEqual} from '@jsonjoy.com/util/lib/json-equal/deepEqual';
import * as str from '../util/diff/str';
import * as line from '../util/diff/line';
import {structHash} from '../json-hash';
import type {Operation} from '../json-patch/codec/json/types';
export class JsonPatchDiff {
protected patch: Operation[] = [];
protected diffVal(path: string, src: unknown, dst: unknown): void {
if (deepEqual(src, dst)) return;
this.patch.push({op: 'replace', path, value: dst});
}
protected diffStr(path: string, src: string, dst: string): void {
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}),
);
}
protected diffBin(path: string, src: Uint8Array, dst: Uint8Array): void {
throw new Error('Not implemented');
}
protected diffObj(path: string, src: Record<string, unknown>, dst: Record<string, unknown>): void {
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]});
}
}
protected diffArr(path: string, src: unknown[], dst: unknown[]): void {
const srcLines: string[] = [];
const dstLines: string[] = [];
const srcLen = src.length;
const dstLen = dst.length;
for (let i = 0; i < srcLen; i++) srcLines.push(structHash(src[i]));
for (let i = 0; i < dstLen; i++) dstLines.push(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 line.LINE_PATCH_OP_TYPE.EQL:
break;
case line.LINE_PATCH_OP_TYPE.MIX: {
const srcValue = src[srcIdx];
const dstValue = dst[dstIdx];
this.diff(pfx + srcIdx, srcValue, dstValue);
break;
}
case line.LINE_PATCH_OP_TYPE.INS:
patch.push({op: 'add', path: pfx + (srcIdx + 1), value: dst[dstIdx]});
break;
case line.LINE_PATCH_OP_TYPE.DEL:
patch.push({op: 'remove', path: pfx + srcIdx});
break;
}
}
}
public diffAny(path: string, src: unknown, dst: unknown): void {
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 Ethis.diffVal(path, src, dst);
return;
}
this.diffObj(path, src as Record<string, unknown>, dst as Record<string, unknown>);
break;
}
default:
this.diffVal(path, src, dst);
break;
}
}
public diff(path: string, src: unknown, dst: unknown): Operation[] {
this.diffAny(path, src, dst);
return this.patch;
}
}
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