From 8167debbe9e63029608f38978bcdd7ce1336439d Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Wed, 27 May 2020 15:18:04 +0700
Subject: [PATCH] Expose git commit hash to backend info api.

---
 backend/src/api/backend-info.ts      | 29 ++++++++++++++++++++++++++++
 backend/src/api/websocket-handler.ts | 19 ++++--------------
 backend/src/routes.ts                |  6 ++----
 3 files changed, 35 insertions(+), 19 deletions(-)
 create mode 100644 backend/src/api/backend-info.ts

diff --git a/backend/src/api/backend-info.ts b/backend/src/api/backend-info.ts
new file mode 100644
index 000000000..8f028bac8
--- /dev/null
+++ b/backend/src/api/backend-info.ts
@@ -0,0 +1,29 @@
+import * as fs from 'fs';
+import * as os from 'os';
+
+class BackendInfo {
+  gitCommitHash = '';
+  hostname = '';
+
+  constructor() {
+    this.setLatestCommitHash();
+    this.hostname = os.hostname();
+  }
+
+  public getBackendInfo() {
+    return {
+      'hostname': this.hostname,
+      'git-commit': this.gitCommitHash,
+    };
+  }
+
+  private setLatestCommitHash(): void {
+    try {
+      this.gitCommitHash = fs.readFileSync('../.git/refs/heads/master').toString().trim();
+    } catch (e) {
+      console.log('Could not load git commit info, skipping.');
+    }
+  }
+}
+
+export default new BackendInfo();
diff --git a/backend/src/api/websocket-handler.ts b/backend/src/api/websocket-handler.ts
index a80768957..339e8efd5 100644
--- a/backend/src/api/websocket-handler.ts
+++ b/backend/src/api/websocket-handler.ts
@@ -1,30 +1,19 @@
 const config = require('../../mempool-config.json');
 
 import * as WebSocket from 'ws';
-import * as fs from 'fs';
 import { Block, TransactionExtended, Statistic, WebsocketResponse } from '../interfaces';
 import blocks from './blocks';
 import memPool from './mempool';
+import backendInfo from './backend-info';
 import mempoolBlocks from './mempool-blocks';
 import fiatConversion from './fiat-conversion';
 import * as os from 'os';
 
 class WebsocketHandler {
   private wss: WebSocket.Server | undefined;
-  private latestGitCommitHash = '';
   private nativeAssetId = '6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d';
 
-  constructor() {
-    this.setLatestGitCommit();
-  }
-
-  setLatestGitCommit() {
-    try {
-      this.latestGitCommitHash = fs.readFileSync('../.git/refs/heads/master').toString().trim();
-    } catch (e) {
-      console.log('Could not load git commit info, skipping.');
-    }
-  }
+  constructor() { }
 
   setWebsocketServer(wss: WebSocket.Server) {
     this.wss = wss;
@@ -93,8 +82,8 @@ class WebsocketHandler {
               'blocks': _blocks.slice(Math.max(_blocks.length - config.INITIAL_BLOCK_AMOUNT, 0)),
               'conversions': fiatConversion.getTickers()['BTCUSD'],
               'mempool-blocks': mempoolBlocks.getMempoolBlocks(),
-              'git-commit': this.latestGitCommitHash,
-              'hostname': os.hostname(),
+              'git-commit': backendInfo.gitCommitHash,
+              'hostname': backendInfo.hostname,
             }));
           }
 
diff --git a/backend/src/routes.ts b/backend/src/routes.ts
index 397a9ce02..20df6ca87 100644
--- a/backend/src/routes.ts
+++ b/backend/src/routes.ts
@@ -1,8 +1,8 @@
 import statistics from './api/statistics';
 import feeApi from './api/fee-api';
+import backendInfo from './api/backend-info';
 import mempoolBlocks from './api/mempool-blocks';
 import mempool from './api/mempool';
-import * as os from 'os';
 
 class Routes {
   private cache = {};
@@ -76,9 +76,7 @@ class Routes {
   }
 
   public getBackendInfo(req, res) {
-    res.send({
-      'hostname': os.hostname(),
-    });
+    res.send(backendInfo.getBackendInfo());
   }
 }