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set.ts
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import { ProxyDraft } from './interface';
import { dataTypes, iteratorSymbol } from './constant';
import { internal } from './internal';
import {
ensureShallowCopy,
getProxyDraft,
isDraftable,
markChanged,
markFinalization,
} from './utils';
import { checkReadable } from './unsafe';
import { generatePatches } from './patch';
const getNextIterator =
(
target: ProxyDraft<any>,
iterator: IterableIterator<any>,
{ isValuesIterator }: { isValuesIterator: boolean }
) =>
() => {
const result = iterator.next();
if (result.done) return result;
const key = result.value as any;
let value = target.setMap!.get(key);
const currentDraft = getProxyDraft(value);
const mutable =
target.options.mark?.(value, dataTypes) === dataTypes.mutable;
if (target.options.strict) {
checkReadable(key, target.options, mutable);
}
if (
!mutable &&
!currentDraft &&
isDraftable(key, target.options) &&
!target.finalized &&
target.original!.has(key)
) {
// draft a draftable original set item
const proxy = internal.createDraft({
original: key,
parentDraft: target,
key,
finalities: target.finalities,
options: target.options,
});
target.setMap!.set(key, proxy);
value = proxy;
} else if (currentDraft) {
// drafted
value = currentDraft.proxy;
}
return {
done: false,
value: isValuesIterator ? value : [value, value],
};
};
export const setHandler = {
get size() {
const target: ProxyDraft<any> = getProxyDraft(this)!;
return target.setMap!.size;
},
has(value: any) {
const target = getProxyDraft(this)!;
// reassigned or non-draftable values
if (target.setMap!.has(value)) return true;
ensureShallowCopy(target);
const valueProxyDraft = getProxyDraft(value)!;
// drafted
if (valueProxyDraft && target.setMap!.has(valueProxyDraft.original))
return true;
return false;
},
add(value: any) {
const target = getProxyDraft(this)!;
if (!this.has(value)) {
ensureShallowCopy(target);
markChanged(target);
target.assignedMap!.set(value, true);
target.setMap!.set(value, value);
markFinalization(target, value, value, generatePatches);
}
return this;
},
delete(value: any): boolean {
if (!this.has(value)) {
return false;
}
const target = getProxyDraft(this)!;
ensureShallowCopy(target);
markChanged(target);
const valueProxyDraft = getProxyDraft(value)!;
if (valueProxyDraft && target.setMap!.has(valueProxyDraft.original)) {
// delete drafted
target.assignedMap!.set(valueProxyDraft.original, false);
return target.setMap!.delete(valueProxyDraft.original);
}
if (!valueProxyDraft && target.setMap!.has(value)) {
// non-draftable values
target.assignedMap!.set(value, false);
} else {
// reassigned
target.assignedMap!.delete(value);
}
// delete reassigned or non-draftable values
return target.setMap!.delete(value);
},
clear() {
if (!this.size) return;
const target = getProxyDraft(this)!;
ensureShallowCopy(target);
markChanged(target);
for (const value of target.original) {
target.assignedMap!.set(value, false);
}
target.setMap!.clear();
},
values(): IterableIterator<any> {
const target = getProxyDraft(this)!;
ensureShallowCopy(target);
const iterator = target.setMap!.keys();
return {
[Symbol.iterator]: () => this.values(),
next: getNextIterator(target, iterator, { isValuesIterator: true }),
};
},
entries(): IterableIterator<[any, any]> {
const target = getProxyDraft(this)!;
ensureShallowCopy(target);
const iterator = target.setMap!.keys();
return {
[Symbol.iterator]: () => this.entries(),
next: getNextIterator(target, iterator, {
isValuesIterator: false,
}) as () => IteratorReturnResult<any>,
};
},
keys(): IterableIterator<any> {
return this.values();
},
[iteratorSymbol]() {
return this.values();
},
forEach(callback: any, thisArg?: any) {
const iterator = this.values();
let result = iterator.next();
while (!result.done) {
callback.call(thisArg, result.value, result.value, this);
result = iterator.next();
}
},
};
export const setHandlerKeys = Reflect.ownKeys(setHandler);