Merge Feature/utility library (asu cidse 2025 fall) into main

.github/workflows/ci.yml

@@ -0,0 +1,28 @@
+name: CI - ShellCheck & Tests
+
+on:
+  pull_request:
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y shellcheck bats
+
+      - name: Run ShellCheck on Backend scripts
+        run: |
+          cd Backend
+          shellcheck -x *.sh test/*.sh
+
+      - name: Run test runner
+        run: |
+          chmod +x Backend/test/run.sh
+          bash Backend/test/run.sh
+

Backend/Cybercafe_daemon.sh

@@ -0,0 +1,44 @@
+#!/data/data/com.termux/files/usr/bin/bash
+#Organization: Grey-box
+#Project: Cybercafe
+#File: daemon
+#Description: Main script that is run at start. This script is invoked by Cybercafe_commandLine.sh
+
+###INCLUDES###
+BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+. "$BASE_DIR/cybercafe.conf"
+. "$BASE_DIR/Cybercafe_setupFunctions.sh"
+. "$BASE_DIR/Cybercafe_internetSessionFunctions.sh"
+
+### START OF PROGRAM EXECUTION ###
+while true; do
+	trap 'echo -e "$(date) Error in Cybercafe_daemon.sh: Line ${LINENO}\n" >> error.log' ERR > /dev/null 2>> error.log
+	check_hotspot_status
+
+	#Case 1: Hotspot up and was up in previous check
+    if [[ $HS_STATUS == 'up' ]] && [[ $HS_STATUS_PREV == 'up' ]]; then
+		check_internet_sessions
+
+	#Case 2: Hotspot up and was down in previous check
+    elif [[ $HS_STATUS == 'up' ]] && [[ $HS_STATUS_PREV == 'down' ]]; then
+        setup_infrastructure
+
+	#Case 3: Hotspot down and was up in previous check
+    elif [[ $HS_STATUS == 'down' ]] && [[ $HS_STATUS_PREV == 'up' ]]; then
+        # Assume hotspot has recently gone down. Clean up.
+		clear_internet_sessions
+        shutdown_infrastructure
+
+	#Case 4: Hotspot down and was down in previous check
+    else
+		:
+    fi
+
+	if [[ -f ./shutdown.confirmed ]]; then
+		clear_internet_sessions
+		shutdown_infrastructure
+		exit
+	fi
+
+	sleep 2
+done