Add dynamic login/logout dropdown menu to navbar.

Add dynamic login/welcome message to index.php.
Change login link from static text to dynamically generated according to the current scheme (http/https), domain and path.
Remove some excessive commenting from functions.php.

common/head.php

@@ -29,6 +29,9 @@
                 <a class="nav-item nav-link" href="projects.php">Projects</a>
                 <a class="nav-item nav-link" href="tasks.php">Tasks</a>
                 <a class="nav-item nav-link" href="users.php">Users</a>
+				<div class="btn-group">
+					<?php echo GetMenu(); ?>
+				</div>
             </div>
         </div>
     </nav>

functions.php

@@ -15,39 +15,13 @@
 // MySQL DB
 $sqldb = "translator";
 
-////////////////////////////////////////////////////////////
-// 						functions.php					  //
-// Contains all the functions that interact with MySQL DB //
-//														  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-// DO NOT EDIT BELOW THIS LINE IF YOU DON'T KNOW WHAT YOU //
-// 						  ARE DOING						  //
-//														  //
-////////////////////////////////////////////////////////////
+// Below this line, this file holds all the crucial code of the app.
+// Please do not edit anything if you don't know what you are doing
 
 //////////////////////////
-//						//
 // GENERIC DB FUNCTIONS //
-//						//
 //////////////////////////
+
 function openSQL() {
 	$GLOBALS['sqlcon'] = mysqli_connect($GLOBALS['sqlserver'], $GLOBALS['sqluser'], $GLOBALS['sqlpass'], $GLOBALS['sqldb']);
 	if (mysqli_connect_error()) {
@@ -500,6 +474,41 @@ function GetAllUsers() {
 	}
 }
 
+function GetMainPageContent() {
+	if (isset($_COOKIE['username'])) {
+		$hasaccess = CheckUserAccess($_COOKIE['username']);
+	} else {
+		$hasaccess = 0;
+	}
+	if ($hasaccess > 0) {
+		return "Welcome, " . $_COOKIE['username'] . ". You are already logged in, and you are registered as a member with access to the app, so feel free to stick around.";
+	} else {
+		return "This app is only intended for use by the <?php echo $teamname; ?> Translation Team. You need to login before you proceed to use anything in this app!<br /><a href=\"https://steemconnect.com/oauth2/authorize?client_id=aristotle.app&redirect_uri=". $_SERVER['REQUEST_SCHEME'] . "://" . $_SERVER['SERVER_NAME'] . dirname($_SERVER['REQUEST_URI']) . "/callback.php\"; ?>&scope=login\" class=\"font-weight-bold\">Secure login via SteemConnect</a>";
+	}
+
+}
+
+function GetMenu() {
+	if (isset($_COOKIE['username'])) {
+		$hasaccess = CheckUserAccess($_COOKIE['username']);
+	} else {
+		$hasaccess = 0;
+	}
+	if ($hasaccess > 0) {
+		return "<button type=\"button\" class=\"btn btn-secondary dropdown-toggle\" data-toggle=\"dropdown\" aria-haspopup=\"true\" aria-expanded=\"false\">Welcome ".$_COOKIE['username']."</button><div class=\"dropdown-menu dropdown-menu-right\"><a class=\"btn dropdown-item\" href=\"logout.php\">Logout</a></div>";
+	} else {
+		return "<button type=\"button\" class=\"btn btn-secondary dropdown-toggle\" data-toggle=\"dropdown\" aria-haspopup=\"true\" aria-expanded=\"false\">Welcome, Guest</button><div class=\"dropdown-menu dropdown-menu-right\"><a class=\"btn dropdown-item\" href=\"https://steemconnect.com/oauth2/authorize?client_id=aristotle.app&redirect_uri=".  $_SERVER['REQUEST_SCHEME'] . "://" . $_SERVER['SERVER_NAME'] . dirname($_SERVER['REQUEST_URI']) . "/callback.php&scope=login\">Login via SteemConnect</a></div>";
+	}
+}
+
+function LogOut() {
+	unset($_COOKIE['username']);
+	unset($_COOKIE['code']);
+	setcookie('username', null, -1);
+	setcookie('code', null, -1);
+	Header("Location: index.php");
+}
+
 function closeSQL() {
 	global $sqlcon;
 	mysqli_close($sqlcon);

index.php

@@ -7,8 +7,7 @@
     <div class="container">
         <div class="row">
             <div class="col-lg-8 mx-auto text-center">
-                This app is only intended for use by the <?php echo $teamname; ?> Translation Team. You need to login before you proceed to use anything in this app!<br />
-				<a href="https://steemconnect.com/oauth2/authorize?client_id=aristotle.app&redirect_uri=http://localhost/tasklist/callback.php&scope=login" class="font-weight-bold">Secure login via SteemConnect</a><br />
+                <?php echo GetMainPageContent();?><br />
 				<hr />
 				Follow <a href="https://steemit.com/@dimitrisp" target="_blank">@dimitrisp</a> and the app's account <a href="https://steemit.com/@aristotle.team" target="_blank">@aristotle.team</a> for updates!<br />
 				<span class="font-weight-light font-italic">Right now, this app is only using the 'login' scope of SteemConnect, just to verify your identity. This app can't and won't post/transfer/vote anything with your account. Even if we wanted to, the 'login' scope is not giving us any permissions to do any of those actions.</span>