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Copy pathkeyed-type.ts
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keyed-type.ts
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// Copyright (c) 2020, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
import type {Keyable} from './keyed-type.interfaces.js';
import {logger} from './logger.js';
function makeKeyMap<T extends Keyable>(typeName: string, objects: Record<string, T>): Record<string, T> {
const keyToNameMap: Record<string, string> = {};
const keyToTypeMap: Record<string, T> = {};
let haveErrors = false;
for (const name in objects) {
const type = objects[name];
const keys = type.key;
if (keys === undefined) {
logger.error(`${typeName} ${name} does not provide a key value`);
haveErrors = true;
} else if (keys) {
for (const key of Array.isArray(keys) ? keys : [keys]) {
if (keyToTypeMap[key] === undefined) {
keyToTypeMap[key] = type;
keyToNameMap[key] = name;
} else {
logger.error(`${typeName} ${name} key conflicts with ${keyToNameMap[key]}`);
haveErrors = true;
}
}
} else {
logger.error(`${typeName} ${name} provides empty key value`);
haveErrors = true;
}
}
// If there are any errors, we just log them and continue above. Once done, we throw to
// halt instance startup so the logs don't get lost in a wall of text.
if (haveErrors) throw new Error(`${typeName} KeyedType configuration error`);
return keyToTypeMap;
}
export function makeKeyedTypeGetter<T extends Keyable>(
typeName: string,
objects: Record<string, T>,
): (key: string) => T {
const keyMap = makeKeyMap(typeName, objects);
return function getFromKey(key) {
if (key in keyMap) {
return keyMap[key];
}
throw new Error(`No ${typeName} named '${key}' found`);
};
}
export function makeDefaultedKeyedTypeGetter<T extends Keyable>(
typeName: string,
objects: Record<string, T>,
defaultObject: T,
): (key: string) => T {
const keyMap = makeKeyMap(typeName, objects);
return function getFromKey(key) {
if (key in keyMap) {
return keyMap[key];
}
return defaultObject;
};
}