From a49f89bf97956abcca5a57e7b17720afd42db03c Mon Sep 17 00:00:00 2001
From: Pavel Gnedov <pavel@gnedov.info>
Date: Sun, 24 Jul 2022 06:44:20 +0700
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---
 configs/main-config.jsonc.dist |  7 +++++++
 src/configs/app.ts             | 36 ++++++++++++++++++++--------------
 2 files changed, 28 insertions(+), 15 deletions(-)
 create mode 100644 configs/main-config.jsonc.dist

diff --git a/configs/main-config.jsonc.dist b/configs/main-config.jsonc.dist
new file mode 100644
index 0000000..90c7a6b
--- /dev/null
+++ b/configs/main-config.jsonc.dist
@@ -0,0 +1,7 @@
+{
+  "couchDb": {
+    "dbs": {
+      "changes": ""
+    }  
+  }
+}
\ No newline at end of file
diff --git a/src/configs/app.ts b/src/configs/app.ts
index 64e2c38..03017c7 100644
--- a/src/configs/app.ts
+++ b/src/configs/app.ts
@@ -1,23 +1,29 @@
 import RedmineIssueEventEmitterConfigLoader from '@app/event-emitter/configs/main-config';
+import { readFileSync } from 'fs';
+import { join } from 'path';
+import { parse } from 'jsonc-parser';
 
 const redmineIssueEventEmitterConfig = RedmineIssueEventEmitterConfigLoader();
 
-const appConfig = {
-  couchDbUrl:
-    process.env['ELTEX_REDMINE_HELPER_COUCHDB_URL'] || 'http://localhost:5984',
-
-  dbs: {
-    issues:
-      process.env['ELTEX_REDMINE_HELPER_COUCHDB_ISSUES_DB_NAME'] ||
-      'redmine_issues',
-    users:
-      process.env['ELTEX_REDMINE_HELPER_COUCHDB_USERS_DB_NAME'] ||
-      'redmine_users',
-  },
-
-  redmineIssueEventEmitterConfig: redmineIssueEventEmitterConfig,
-};
+let appConfig;
 
 export default () => {
+  if (appConfig) {
+    return appConfig;
+  }
+
+  const userDefinedConfigPath = process.env['ELTEX_REDMINE_HELPER_CONFIG_PATH'];
+  const defaultConfigPath = join('configs', 'main-config.jsonc');
+  const configPath = userDefinedConfigPath || defaultConfigPath;
+
+  const rawData = readFileSync(configPath, { encoding: 'utf-8' });
+
+  const data = parse(rawData);
+
+  appConfig = {
+    ...data,
+    redmineIssueEventEmitterConfig: redmineIssueEventEmitterConfig,
+  };
+
   return appConfig;
 };