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import { Value, Key, KeyPath } from "./types";
import extractKey from "./extractKey";
import { DataError } from "./errors";
import valueToKey from "./valueToKey";
import structuredClone from "./structuredClone";
import injectKey from "./injectKey";
export interface StoreKeyResult {
updatedKeyGenerator: number;
key: Key;
value: Value;
}
export function makeStoreKeyValue(
value: Value,
key: Key | undefined,
currentKeyGenerator: number,
autoIncrement: boolean,
keyPath: KeyPath | null,
): StoreKeyResult {
const haveKey = key !== undefined && key !== null;
const haveKeyPath = keyPath !== null && keyPath !== undefined;
// This models a decision table on (haveKey, haveKeyPath, autoIncrement)
value = structuredClone(value);
if (haveKey) {
if (haveKeyPath) {
// (yes, yes, no)
// (yes, yes, yes)
throw new DataError();
} else {
if (autoIncrement) {
// (yes, no, yes)
key = valueToKey(key)!;
let updatedKeyGenerator: number;
if (typeof key !== "number") {
updatedKeyGenerator = currentKeyGenerator;
} else {
updatedKeyGenerator = key;
}
return {
key: key!,
value: value,
updatedKeyGenerator,
};
} else {
// (yes, no, no)
throw new DataError();
}
}
} else {
if (haveKeyPath) {
if (autoIncrement) {
// (no, yes, yes)
let updatedKeyGenerator: number;
const maybeInlineKey = extractKey(keyPath!, value);
if (maybeInlineKey === undefined) {
value = injectKey(keyPath!, value, currentKeyGenerator);
key = currentKeyGenerator;
updatedKeyGenerator = currentKeyGenerator + 1;
} else if (typeof maybeInlineKey === "number") {
key = maybeInlineKey;
if (maybeInlineKey >= currentKeyGenerator) {
updatedKeyGenerator = maybeInlineKey + 1;
} else {
updatedKeyGenerator = currentKeyGenerator;
}
} else {
key = maybeInlineKey;
updatedKeyGenerator = currentKeyGenerator;
}
return {
key: key,
value: value,
updatedKeyGenerator,
}
} else {
// (no, yes, no)
key = extractKey(keyPath!, value);
key = valueToKey(key);
return {
key: key!,
value: value,
updatedKeyGenerator: currentKeyGenerator,
};
}
} else {
if (autoIncrement) {
// (no, no, yes)
return {
key: currentKeyGenerator,
value: value,
updatedKeyGenerator: currentKeyGenerator + 1,
}
} else {
// (no, no, no)
throw new DataError();
}
}
}
}
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