35 lines
1013 B
TypeScript
35 lines
1013 B
TypeScript
import { KeyPath, Value } from "./types";
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// http://w3c.github.io/IndexedDB/#check-that-a-key-could-be-injected-into-a-value
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const canInjectKey = (keyPath: KeyPath, value: Value) => {
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if (Array.isArray(keyPath)) {
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// tslint:disable-next-line max-line-length
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throw new Error(
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"The key paths used in this section are always strings and never sequences, since it is not possible to create a object store which has a key generator and also has a key path that is a sequence.",
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);
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}
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const identifiers = keyPath.split(".");
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if (identifiers.length === 0) {
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throw new Error("Assert: identifiers is not empty");
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}
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identifiers.pop();
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for (const identifier of identifiers) {
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if (typeof value !== "object" && !Array.isArray(value)) {
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return false;
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}
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const hop = value.hasOwnProperty(identifier);
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if (!hop) {
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return true;
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}
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value = value[identifier];
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}
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return typeof value === "object" || Array.isArray(value);
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};
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export default canInjectKey;
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