95 lines
2.3 KiB
TypeScript
95 lines
2.3 KiB
TypeScript
import { ConfigEntity } from "../entities/Config";
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import fs from "fs";
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import { ConfigValue } from "../config";
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// TODO: yaml instead of json
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const overridePath = process.env.CONFIG_PATH ?? "";
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var config: ConfigValue;
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var pairs: ConfigEntity[];
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// TODO: use events to inform about config updates
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// Config keys are separated with _
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export const Config = {
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init: async function init() {
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if (config) return config;
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console.log('[Config] Loading configuration...')
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pairs = await ConfigEntity.find();
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config = pairsToConfig(pairs);
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// TODO: this overwrites existing config values with defaults.
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// we actually want to extend the object with new keys instead.
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// config = (config || {}).merge(new ConfigValue());
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if (process.env.CONFIG_PATH) {
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console.log(`[Config] Using config path from environment rather than database.`);
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try {
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const overrideConfig = JSON.parse(fs.readFileSync(overridePath, { encoding: "utf8" }));
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config = overrideConfig.merge(config);
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} catch (error) {
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fs.writeFileSync(overridePath, JSON.stringify(config, null, 4));
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}
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}
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return this.set(config);
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},
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get: function get() {
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return config;
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},
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set: function set(val: Partial<ConfigValue>) {
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if (!config || !val) return;
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config = val.merge(config);
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return applyConfig(config);
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},
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};
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function applyConfig(val: ConfigValue) {
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async function apply(obj: any, key = ""): Promise<any> {
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if (typeof obj === "object" && obj !== null)
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return Promise.all(
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Object.keys(obj).map((k) =>
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apply(obj[k], key ? `${key}_${k}` : k),
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),
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);
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let pair = pairs.find((x) => x.key === key);
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if (!pair) pair = new ConfigEntity();
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pair.key = key;
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pair.value = obj;
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return pair.save();
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}
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if (process.env.CONFIG_PATH)
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fs.writeFileSync(overridePath, JSON.stringify(val, null, 4));
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return apply(val);
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}
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function pairsToConfig(pairs: ConfigEntity[]) {
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var value: any = {};
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pairs.forEach((p) => {
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const keys = p.key.split("_");
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let obj = value;
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let prev = "";
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let prevObj = obj;
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let i = 0;
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for (const key of keys) {
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if (!isNaN(Number(key)) && !prevObj[prev]?.length)
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prevObj[prev] = obj = [];
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if (i++ === keys.length - 1) obj[key] = p.value;
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else if (!obj[key]) obj[key] = {};
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prev = key;
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prevObj = obj;
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obj = obj[key];
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}
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});
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return value as ConfigValue;
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}
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