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Config: New config and store classes to replace the mongo method

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Diego Magdaleno 2021-05-22 16:40:04 -05:00
parent 7c0d9c0193
commit c06527c073
3 changed files with 250 additions and 33 deletions
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139
package-lock.json generated
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@ -13,6 +13,9 @@
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3
package.json
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@ -30,6 +30,9 @@
"@types/mongoose-autopopulate": "^0.10.1",
"@types/mongoose-lean-virtuals": "^0.5.1",
"@types/node": "^14.14.25",
"ajv": "^8.5.0",
"dot-prop": "^6.0.1",
"env-paths": "^2.2.1",
"jsonwebtoken": "^8.5.1",
"missing-native-js-functions": "^1.2.2",
"mongodb": "^3.6.6",

141
src/util/Config.ts
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@ -1,38 +1,113 @@
import { Schema, model, Types, Document } from "mongoose";
import "missing-native-js-functions";
import db, { MongooseCache } from "./Database";
import envPaths from "env-paths";
import path from "path";
import { JSONSchemaType, ValidateFunction } from "ajv"
import fs from 'fs'
import dotProp from "dot-prop";
var Config = new MongooseCache(db.collection("config"), [], { onlyEvents: false });
export default {
init: async function init(defaultOpts: any = DefaultOptions) {
await Config.init();
return this.setAll(Config.data.merge(defaultOpts));
},
getAll: function get() {
return <DefaultOptions>Config.data;
},
setAll: function set(val: any) {
return db.collection("config").updateOne({}, { $set: val }, { upsert: true });
},
};
export const DefaultOptions = {
api: {},
gateway: {},
voice: {},
};
export interface DefaultOptions extends Document {
api?: any;
gateway?: any;
voice?: any;
interface Options<T> {
path: string;
schemaValidator: ValidateFunction;
schema: JSONSchemaType<T>;
}
export const ConfigSchema = new Schema({
api: Object,
gateway: Object,
voice: Object,
});
type Deserialize<T> = (text: string) => T;
function getConfigPath(name: string, configFileName: string, extension: string): string {
const configEnvPath = envPaths(name, { suffix: "" }).config;
const configPath = path.resolve(configEnvPath, `${configFileName}${extension}`)
return configPath
}
class Store<T extends Record<string, any> = Record<string, unknown>> implements Iterable<[keyof T, T[keyof T]]>{
readonly path: string;
readonly validator: ValidateFunction;
readonly schema: string;
constructor(path: string, validator: ValidateFunction, schema: JSONSchemaType<T>) {
this.validator = validator;
if (fs.existsSync(path)) {
this.path = path
} else {
this._ensureDirectory()
}
}
private readonly _deserialize: Deserialize<T> = value => JSON.parse(value);
private _ensureDirectory(): void {
fs.mkdirSync(path.dirname(this.path), { recursive: true })
}
protected _validate(data: T | unknown): void {
const valid = this.validator(data);
if (valid || !this.validator.errors) {
return;
}
const errors = this.validator.errors.map(({ instancePath, message = '' }) => `\`${instancePath.slice(1)}\` ${message}`);
throw new Error("The configuration schema was violated!: " + errors.join('; '))
}
*[Symbol.iterator](): IterableIterator<[keyof T, T[keyof T]]> {
for (const [key, value] of Object.entries(this.store)) {
yield [key, value]
}
}
public get store(): T {
try {
const data = fs.readFileSync(this.path).toString();
const deserializedData = this._deserialize(data);
this._validate(deserializedData);
return Object.assign(Object.create(null), deserializedData);
} catch (error) {
if (error == 'ENOENT') {
this._ensureDirectory();
throw new Error("Critical, config store does not exist, the base directory has been created, copy the necessary config files to the directory");
}
throw error;
}
}
}
class Config<T extends Record<string, any> = Record<string, unknown>> extends Store<T> implements Iterable<[keyof T, T[keyof T]]> {
constructor(options: Readonly<Partial<Options<T>>>) {
super(options.path!, options.schemaValidator!, options.schema!);
this._validate(this.store);
}
public get<Key extends keyof T>(key: Key): T[Key];
public get<Key extends keyof T>(key: Key, defaultValue: Required<T>[Key]): Required<T>[Key];
public get<Key extends string, Value = unknown>(key: Exclude<Key, keyof T>, defaultValue?: Value): Value;
public get(key: string, defaultValue?: unknown): unknown {
return this._get(key, defaultValue);
}
public getAll(): unknown {
return this.store as unknown;
}
private _has<Key extends keyof T>(key: Key | string): boolean {
return dotProp.has(this.store, key as string);
}
private _get<Key extends keyof T>(key: Key): T[Key] | undefined;
private _get<Key extends keyof T, Default = unknown>(key: Key, defaultValue: Default): T[Key] | Default;
private _get<Key extends keyof T, Default = unknown>(key: Key | string, defaultValue?: Default): Default | undefined {
if (!this._has(key)) {
throw new Error("Tried to acess a non existant property in the config");
}
return dotProp.get<T[Key] | undefined>(this.store, key as string, defaultValue as T[Key]);
}
}
export default Config;
export const ConfigModel = model<DefaultOptions>("Config", ConfigSchema, "config");