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export const APP_PREFIX = "crupest";
export const APP_NAME = "mail-server";
export interface ConfigItemDefinition {
description: string;
default?: string;
secret?: boolean;
}
export const CONFIG_DEFINITIONS = {
mailDomain: {
description: "the part after `@` of an address",
},
dataPath: {
description: "path to save app persistent data",
},
ldaPath: {
description: "full path of lda executable",
"default": "/dovecot/libexec/dovecot/dovecot-lda",
},
inboundFallback: {
description: "comma separated addresses used as fallback recipients",
"default": "",
},
awsInboundPath: {
description: "(random set) path for aws sns",
},
awsInboundKey: {
description: "(random set) http header Authorization for aws sns",
},
awsRegion: {
description: "aws region",
},
awsUser: {
description: "aws access key id",
},
awsPassword: {
description: "aws secret access key",
secret: true,
},
awsMailBucket: {
description: "aws s3 bucket saving raw mails",
secret: true,
},
} as const satisfies Record<string, ConfigItemDefinition>;
type ConfigDefinitions = typeof CONFIG_DEFINITIONS;
type ConfigNames = keyof ConfigDefinitions;
type ConfigMap = {
[K in ConfigNames]: ConfigDefinitions[K] & {
readonly env: string;
readonly value: string;
};
};
function resolveConfig(): ConfigMap {
const result: Record<string, ConfigMap[ConfigNames]> = {};
for (const [name, def] of Object.entries(CONFIG_DEFINITIONS)) {
const env = `${APP_PREFIX}-${APP_NAME}-${
name.replace(/[A-Z]/g, (m) => "-" + m.toLowerCase())
}`.replaceAll("-", "_").toUpperCase();
const value = Deno.env.get(env) ?? (def as ConfigItemDefinition).default;
if (value == null) {
throw new Error(`Required env ${env} (${def.description}) is not set.`);
}
result[name] = { ...def, env, value };
}
return result as ConfigMap;
}
export class Config {
#config = resolveConfig();
readonly HTTP_HOST = "0.0.0.0";
readonly HTTP_PORT = 2345;
readonly SMTP_HOST = "127.0.0.1";
readonly SMTP_PORT = 2346;
getAllConfig<K extends ConfigNames>(key: K): ConfigMap[K] {
return this.#config[key];
}
get(key: ConfigNames): string {
return this.getAllConfig(key).value;
}
getList(key: ConfigNames, separator: string = ","): string[] {
const value = this.get(key);
if (value.length === 0) return [];
return value.split(separator);
}
[Symbol.for("Deno.customInspect")]() {
return Object.entries(this.#config).map(([key, item]) =>
`${key} [env: ${item.env}]: ${
(item as ConfigItemDefinition).secret === true ? "***" : item.value
}`
).join("\n");
}
}
const config = new Config();
export default config;
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