@sinclair/typebox
Version:
Json Schema Type Builder with Static Type Resolution for TypeScript
179 lines (177 loc) • 6.77 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ValueDiffError = exports.Edit = exports.Delete = exports.Update = exports.Insert = void 0;
exports.Diff = Diff;
exports.Patch = Patch;
const index_1 = require("../guard/index");
const index_2 = require("../pointer/index");
const index_3 = require("../clone/index");
const equal_1 = require("../equal/equal");
const index_4 = require("../../type/error/index");
const index_5 = require("../../type/literal/index");
const index_6 = require("../../type/object/index");
const index_7 = require("../../type/string/index");
const index_8 = require("../../type/unknown/index");
const index_9 = require("../../type/union/index");
exports.Insert = (0, index_6.Object)({
type: (0, index_5.Literal)('insert'),
path: (0, index_7.String)(),
value: (0, index_8.Unknown)(),
});
exports.Update = (0, index_6.Object)({
type: (0, index_5.Literal)('update'),
path: (0, index_7.String)(),
value: (0, index_8.Unknown)(),
});
exports.Delete = (0, index_6.Object)({
type: (0, index_5.Literal)('delete'),
path: (0, index_7.String)(),
});
exports.Edit = (0, index_9.Union)([exports.Insert, exports.Update, exports.Delete]);
// ------------------------------------------------------------------
// Errors
// ------------------------------------------------------------------
class ValueDiffError extends index_4.TypeBoxError {
constructor(value, message) {
super(message);
this.value = value;
}
}
exports.ValueDiffError = ValueDiffError;
// ------------------------------------------------------------------
// Command Factory
// ------------------------------------------------------------------
function CreateUpdate(path, value) {
return { type: 'update', path, value };
}
function CreateInsert(path, value) {
return { type: 'insert', path, value };
}
function CreateDelete(path) {
return { type: 'delete', path };
}
// ------------------------------------------------------------------
// AssertDiffable
// ------------------------------------------------------------------
function AssertDiffable(value) {
if (globalThis.Object.getOwnPropertySymbols(value).length > 0)
throw new ValueDiffError(value, 'Cannot diff objects with symbols');
}
// ------------------------------------------------------------------
// Diffing Generators
// ------------------------------------------------------------------
function* ObjectType(path, current, next) {
AssertDiffable(current);
AssertDiffable(next);
if (!(0, index_1.IsStandardObject)(next))
return yield CreateUpdate(path, next);
const currentKeys = globalThis.Object.getOwnPropertyNames(current);
const nextKeys = globalThis.Object.getOwnPropertyNames(next);
// ----------------------------------------------------------------
// inserts
// ----------------------------------------------------------------
for (const key of nextKeys) {
if ((0, index_1.HasPropertyKey)(current, key))
continue;
yield CreateInsert(`${path}/${key}`, next[key]);
}
// ----------------------------------------------------------------
// updates
// ----------------------------------------------------------------
for (const key of currentKeys) {
if (!(0, index_1.HasPropertyKey)(next, key))
continue;
if ((0, equal_1.Equal)(current, next))
continue;
yield* Visit(`${path}/${key}`, current[key], next[key]);
}
// ----------------------------------------------------------------
// deletes
// ----------------------------------------------------------------
for (const key of currentKeys) {
if ((0, index_1.HasPropertyKey)(next, key))
continue;
yield CreateDelete(`${path}/${key}`);
}
}
function* ArrayType(path, current, next) {
if (!(0, index_1.IsArray)(next))
return yield CreateUpdate(path, next);
for (let i = 0; i < Math.min(current.length, next.length); i++) {
yield* Visit(`${path}/${i}`, current[i], next[i]);
}
for (let i = 0; i < next.length; i++) {
if (i < current.length)
continue;
yield CreateInsert(`${path}/${i}`, next[i]);
}
for (let i = current.length - 1; i >= 0; i--) {
if (i < next.length)
continue;
yield CreateDelete(`${path}/${i}`);
}
}
function* TypedArrayType(path, current, next) {
if (!(0, index_1.IsTypedArray)(next) || current.length !== next.length || globalThis.Object.getPrototypeOf(current).constructor.name !== globalThis.Object.getPrototypeOf(next).constructor.name)
return yield CreateUpdate(path, next);
for (let i = 0; i < Math.min(current.length, next.length); i++) {
yield* Visit(`${path}/${i}`, current[i], next[i]);
}
}
function* ValueType(path, current, next) {
if (current === next)
return;
yield CreateUpdate(path, next);
}
function* Visit(path, current, next) {
if ((0, index_1.IsStandardObject)(current))
return yield* ObjectType(path, current, next);
if ((0, index_1.IsArray)(current))
return yield* ArrayType(path, current, next);
if ((0, index_1.IsTypedArray)(current))
return yield* TypedArrayType(path, current, next);
if ((0, index_1.IsValueType)(current))
return yield* ValueType(path, current, next);
throw new ValueDiffError(current, 'Unable to diff value');
}
// ------------------------------------------------------------------
// Diff
// ------------------------------------------------------------------
function Diff(current, next) {
return [...Visit('', current, next)];
}
// ------------------------------------------------------------------
// Patch
// ------------------------------------------------------------------
function IsRootUpdate(edits) {
return edits.length > 0 && edits[0].path === '' && edits[0].type === 'update';
}
function IsIdentity(edits) {
return edits.length === 0;
}
function Patch(current, edits) {
if (IsRootUpdate(edits)) {
return (0, index_3.Clone)(edits[0].value);
}
if (IsIdentity(edits)) {
return (0, index_3.Clone)(current);
}
const clone = (0, index_3.Clone)(current);
for (const edit of edits) {
switch (edit.type) {
case 'insert': {
index_2.ValuePointer.Set(clone, edit.path, edit.value);
break;
}
case 'update': {
index_2.ValuePointer.Set(clone, edit.path, edit.value);
break;
}
case 'delete': {
index_2.ValuePointer.Delete(clone, edit.path);
break;
}
}
}
return clone;
}