From 8bf9b5619d71ac6e383dd3c2a26e4d36e86db8f9 Mon Sep 17 00:00:00 2001
From: asenawritescode <samasena2001@gmail.com>
Date: Tue, 6 Aug 2024 09:54:25 +0300
Subject: [PATCH] chore: initial database setup

---
 database/index.js  |  6 ++++++
 database/mock.js   | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 database/sqlite.js | 37 +++++++++++++++++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 database/index.js
 create mode 100644 database/mock.js
 create mode 100644 database/sqlite.js

diff --git a/database/index.js b/database/index.js
new file mode 100644
index 0000000..695aa9c
--- /dev/null
+++ b/database/index.js
@@ -0,0 +1,6 @@
+class DatabaseSessionManager {
+    constructor() {
+        this.sessions = [];
+    }
+
+}
\ No newline at end of file
diff --git a/database/mock.js b/database/mock.js
new file mode 100644
index 0000000..79f916d
--- /dev/null
+++ b/database/mock.js
@@ -0,0 +1,52 @@
+'use strict';
+
+class InMemorySessionManager{
+    constructor(){
+        this.sessions = [];
+    }
+
+    createNew(session){
+        this.sessions.push(session);
+
+        return session;
+    }
+
+    get(msisdn) {
+        var session = null;
+        this.sessions.forEach(element => {
+            if (element !== null && element.msisdn === msisdn){
+                session = element;
+            }
+        });
+
+        return session;
+    }
+
+    close(session){
+        const testing = (e) => e.msisdn === session.msisdn;
+
+        const index = this.sessions.findIndex(testing);
+
+        if(index > -1){
+            this.sessions.splice(index, 1);
+        }
+    }
+
+    update(session){
+        var ses = []
+
+        for(var i = 0; i < this.sessions.length; i++){
+            if(this.sessions[i] !== null && this.sessions[i].msisdn !== session.msisdn) {
+                ses.push(session);
+            }
+        }
+
+        var n_session = session;
+
+        ses.push(n_session);
+
+        this.sessions = ses;
+    }
+}
+
+module.exports = InMemorySessionManager;
\ No newline at end of file
diff --git a/database/sqlite.js b/database/sqlite.js
new file mode 100644
index 0000000..46efdc9
--- /dev/null
+++ b/database/sqlite.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const Database = require('better-sqlite3');
+
+class SQLiteSessionManager {
+    
+    constructor(file) {
+        this.db = new Database(file);
+        
+        // This is optional to improve performance
+        this.db.pragma('journal_mode = WAL');
+        
+        this.db.prepare('CREATE TABLE IF NOT EXISTS sessions (msisdn TEXT, prompt TEXT, menu TEXT, session TEXT)').run();
+    }
+
+    createNew(session) {
+        this.db.prepare('INSERT INTO sessions VALUES (?, ?, ?, ?)').run(session.msisdn, session.prompt, session.menu, JSON.stringify(session));
+        return session;
+    }
+
+    get(msisdn) {
+        const row = this.db.prepare('SELECT * FROM sessions WHERE msisdn = ?').get(msisdn);
+        return row ? JSON.parse(row.session) : null;
+    }
+
+    close(session) {
+        this.db.prepare('DELETE FROM sessions WHERE msisdn = ?').run(session.msisdn);
+    }
+
+    update(session) {
+        this.db.prepare('UPDATE sessions SET session = ? WHERE msisdn = ?').run(JSON.stringify(session), session.msisdn);
+    }
+    
+
+}
+
+module.exports = SQLiteSessionManager;
\ No newline at end of file