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FDBKeyRange.ts
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import cmp from "./lib/cmp.js";
import { DataError } from "./lib/errors.js";
import { Key } from "./lib/types.js";
import valueToKey from "./lib/valueToKey.js";
// http://www.w3.org/TR/2015/REC-IndexedDB-20150108/#range-concept
class FDBKeyRange {
public static only(value: Key) {
if (arguments.length === 0) {
throw new TypeError();
}
value = valueToKey(value);
return new FDBKeyRange(value, value, false, false);
}
public static lowerBound(lower: Key, open: boolean = false) {
if (arguments.length === 0) {
throw new TypeError();
}
lower = valueToKey(lower);
return new FDBKeyRange(lower, undefined, open, true);
}
public static upperBound(upper: Key, open: boolean = false) {
if (arguments.length === 0) {
throw new TypeError();
}
upper = valueToKey(upper);
return new FDBKeyRange(undefined, upper, true, open);
}
public static bound(
lower: Key,
upper: Key,
lowerOpen: boolean = false,
upperOpen: boolean = false,
) {
if (arguments.length < 2) {
throw new TypeError();
}
const cmpResult = cmp(lower, upper);
if (cmpResult === 1 || (cmpResult === 0 && (lowerOpen || upperOpen))) {
throw new DataError();
}
lower = valueToKey(lower);
upper = valueToKey(upper);
return new FDBKeyRange(lower, upper, lowerOpen, upperOpen);
}
public readonly lower: Key | undefined;
public readonly upper: Key | undefined;
public readonly lowerOpen: boolean;
public readonly upperOpen: boolean;
constructor(
lower: Key | undefined,
upper: Key | undefined,
lowerOpen: boolean,
upperOpen: boolean,
) {
this.lower = lower;
this.upper = upper;
this.lowerOpen = lowerOpen;
this.upperOpen = upperOpen;
}
// https://w3c.github.io/IndexedDB/#dom-idbkeyrange-includes
public includes(key: Key) {
if (arguments.length === 0) {
throw new TypeError();
}
key = valueToKey(key);
if (this.lower !== undefined) {
const cmpResult = cmp(this.lower, key);
if (cmpResult === 1 || (cmpResult === 0 && this.lowerOpen)) {
return false;
}
}
if (this.upper !== undefined) {
const cmpResult = cmp(this.upper, key);
if (cmpResult === -1 || (cmpResult === 0 && this.upperOpen)) {
return false;
}
}
return true;
}
public toString() {
return "[object IDBKeyRange]";
}
}
export default FDBKeyRange;