From d5d604eb405915d360a006173c2d11280979e7b2 Mon Sep 17 00:00:00 2001
From: Pavel Gnedov <pavel@gnedov.info>
Date: Mon, 27 Jan 2025 21:25:34 +0700
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
 =?UTF-8?q?=D0=BD=20=D0=B8=D1=81=D1=82=D0=BE=D1=87=D0=BD=D0=B8=D0=BA=20?=
 =?UTF-8?q?=D0=B4=D0=B0=D0=BD=D0=BD=D1=8B=D1=85=20daily-eccm-reports-v2?=
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---
 .../src/couchdb-datasources/couchdb.ts        | 13 +++--
 .../daily-eccm-reports-v2.datasource.ts       | 55 ++++++++++++++++++-
 2 files changed, 62 insertions(+), 6 deletions(-)

diff --git a/libs/event-emitter/src/couchdb-datasources/couchdb.ts b/libs/event-emitter/src/couchdb-datasources/couchdb.ts
index 19732bc..bff94ce 100644
--- a/libs/event-emitter/src/couchdb-datasources/couchdb.ts
+++ b/libs/event-emitter/src/couchdb-datasources/couchdb.ts
@@ -9,20 +9,25 @@ export class CouchDb {
   private static logger = new Logger(CouchDb.name);
   private static couchdb: nano.ServerScope | null = null;
   private static initialized = false;
+  private static url: string | null = null;
 
   static getCouchDb(): nano.ServerScope | null {
     if (CouchDb.initialized) {
       return CouchDb.couchdb;
     }
     CouchDb.initialized = true;
-    const url = config.couchDb?.url;
-    if (!url) {
+    this.url = config.couchDb?.url;
+    if (!this.url) {
       return null;
     } else {
-      const n = nano(url);
-      CouchDb.logger.log(`CouchDb connected by url ${url} ...`);
+      const n = nano(this.url);
+      CouchDb.logger.log(`CouchDb connected by url ${this.url} ...`);
       CouchDb.couchdb = n;
       return n;
     }
   }
+
+  static getCouchDbUrl(): string | null {
+    return this.url;
+  }
 }
diff --git a/src/couchdb-datasources/daily-eccm-reports-v2.datasource.ts b/src/couchdb-datasources/daily-eccm-reports-v2.datasource.ts
index 7e697a6..fbca808 100644
--- a/src/couchdb-datasources/daily-eccm-reports-v2.datasource.ts
+++ b/src/couchdb-datasources/daily-eccm-reports-v2.datasource.ts
@@ -1,7 +1,12 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { CouchDb } from '@app/event-emitter/couchdb-datasources/couchdb';
 import nano from 'nano';
-import { Report } from 'src/reports/daily-eccm-v2-report-task-runner.service';
+import axios from 'axios';
+
+const DB_NAME = 'eccm_daily_reports_v2';
+const DATETIME_INDEX_ASC = 'datetime-json-index';
+
+type Report = any; // TODO fix this type
 
 @Injectable()
 export class DailyEccmReportsV2Datasource {
@@ -15,15 +20,61 @@ export class DailyEccmReportsV2Datasource {
     }
     DailyEccmReportsV2Datasource.initilized = true;
     const n = CouchDb.getCouchDb();
-    const dbName = 'eccm_daily_reports_v2';
+    const dbName = DB_NAME;
     const dbs = await n.db.list();
     if (!dbs.includes(dbName)) {
       await n.db.create(dbName);
     }
     DailyEccmReportsV2Datasource.db = await n.db.use(dbName);
+    await this.checkAndCreateIndex();
     DailyEccmReportsV2Datasource.logger.log(
       `Connected to daily reports db - ${dbName}`,
     );
     return DailyEccmReportsV2Datasource.db;
   }
+
+  static async checkAndCreateIndex(): Promise<void> {
+    const couchDbUrl = CouchDb.getCouchDbUrl();
+    const indexes = await DailyEccmReportsV2Datasource.getIndexes(couchDbUrl);
+    const index = indexes.find(
+      (index: any) => index.name === DATETIME_INDEX_ASC,
+    );
+    if (!index) {
+      await DailyEccmReportsV2Datasource.createIndex(couchDbUrl);
+    }
+  }
+
+  private static async getIndexes(couchDbUrl: string): Promise<any[]> {
+    const response = await axios.get(
+      `${couchDbUrl}/${DB_NAME}/_index?skip=0&limit=999999`,
+      {
+        headers: {
+          Accept: 'application/json',
+          'Content-Type': 'application/json',
+        },
+      },
+    );
+    this.logger.debug(`Indexes: ${JSON.stringify(response.data.indexes)}`);
+    return response.data.indexes;
+  }
+
+  private static async createIndex(couchDbUrl: string): Promise<boolean> {
+    this.logger.debug(`Creating index ${DATETIME_INDEX_ASC}`);
+    const body = {
+      index: { fields: [{ datetime: 'asc' }] },
+      name: DATETIME_INDEX_ASC,
+      type: 'json',
+    };
+    const response = await axios.post(`${couchDbUrl}/${DB_NAME}/_index`, body, {
+      headers: {
+        Accept: 'application/json',
+        'Content-Type': 'application/json',
+      },
+    });
+    this.logger.debug(
+      `Index ${DATETIME_INDEX_ASC} created ` +
+        `with response: ${JSON.stringify(response.data)}`,
+    );
+    return true;
+  }
 }