Rework permission handling

Add a new function has_credential() that checks whether the currently
logged in user is allowed to perform a given action. Moving all
permission handling to this central place makes adding new user groups
and adjusting permissions much more convenient.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

9 files changed, 27 insertions, 68 deletions

diff --git a/web/html/account.php b/web/html/account.php
index 47cf6d27..f212eabb 100644
--- a/web/html/account.php
+++ b/web/html/account.php
@@ -18,18 +18,14 @@ echo "  <h2>".__("Accounts")."</h2>\n";
 $action = in_request("Action");
 
 if (isset($_COOKIE["AURSID"])) {
-	# visitor is logged in
-	#
-	$atype = account_from_sid($_COOKIE["AURSID"]);
-
 	if ($action == "SearchAccounts") {
 
 		# security check
 		#
-		if ($atype == "Trusted User" || $atype == "Developer") {
+		if (has_credential(CRED_ACCOUNT_SEARCH)) {
 			# the user has entered search criteria, find any matching accounts
 			#
-			search_results_page($atype, in_request("O"), in_request("SB"),
+			search_results_page(in_request("O"), in_request("SB"),
 					in_request("U"), in_request("T"), in_request("S"),
 					in_request("E"), in_request("R"), in_request("I"),
 					in_request("K"));
@@ -48,8 +44,8 @@ if (isset($_COOKIE["AURSID"])) {
 			print __("Could not retrieve information for the specified user.");
 		} else {
 			/* Verify user has permission to edit the account */
-			if (can_edit_account($atype, $row, uid_from_sid($_COOKIE["AURSID"]))) {
-				display_account_form($atype, "UpdateAccount", $row["Username"],
+			if (can_edit_account($row)) {
+				display_account_form("UpdateAccount", $row["Username"],
 					$row["AccountTypeID"], $row["Suspended"], $row["Email"],
 					"", "", $row["RealName"], $row["LangPreference"],
 					$row["IRCNick"], $row["PGPKey"],
@@ -70,22 +66,20 @@ if (isset($_COOKIE["AURSID"])) {
 		}
 
 	} elseif ($action == "UpdateAccount") {
-		$uid = uid_from_sid($_COOKIE['AURSID']);
-
 		/* Details for account being updated */
 		$acctinfo = account_details(in_request('ID'), in_request('U'));
 
 		/* Verify user permissions and that the request is a valid POST */
-		if (can_edit_account($atype, $acctinfo, $uid) && check_token()) {
+		if (can_edit_account($acctinfo) && check_token()) {
 			/* Update the details for the existing account */
-			process_account_form($atype, "edit", "UpdateAccount",
+			process_account_form("edit", "UpdateAccount",
 					in_request("U"), in_request("T"), in_request("S"),
 					in_request("E"), in_request("P"), in_request("C"),
 					in_request("R"), in_request("L"), in_request("I"),
 					in_request("K"), in_request("J"), in_request("ID"));
 		}
 	} else {
-		if ($atype == "Trusted User" || $atype == "Developer") {
+		if (has_credential(CRED_ACCOUNT_SEARCH)) {
 			# display the search page if they're a TU/dev
 			#
 			print __("Use this form to search existing accounts.")."<br />\n";
diff --git a/web/html/addvote.php b/web/html/addvote.php
index 3ce99c0b..0b6b9c66 100644
--- a/web/html/addvote.php
+++ b/web/html/addvote.php
@@ -11,13 +11,10 @@ $title = __("Add Proposal");
 html_header($title);
 
 if (isset($_COOKIE["AURSID"])) {
-  $atype = account_from_sid($_COOKIE["AURSID"]);
-  $uid = uid_from_sid($_COOKIE["AURSID"]);
-} else {
-  $atype = "";
+	$uid = uid_from_sid($_COOKIE["AURSID"]);
 }
 
-if ($atype == "Trusted User" || $atype == "Developer") {
+if (has_credential(CRED_TU_ADD_VOTE)) {
 
 	if (!empty($_POST['addVote']) && !check_token()) {
 		$error = __("Invalid token for user action.");
diff --git a/web/html/packages.php b/web/html/packages.php
index 2fb9cbc6..645806e9 100644
--- a/web/html/packages.php
+++ b/web/html/packages.php
@@ -35,13 +35,6 @@ if (isset($pkgname)) {
 	$title = __("Packages");
 }
 
-# Retrieve account type
-if (isset($_COOKIE["AURSID"])) {
-	$atype = account_from_sid($_COOKIE["AURSID"]);
-} else {
-	$atype = "";
-}
-
 $details = array();
 if (isset($pkgname)) {
 	$details = pkg_get_details($pkgid);
diff --git a/web/html/pkgbase.php b/web/html/pkgbase.php
index cf2b774e..4f35a67a 100644
--- a/web/html/pkgbase.php
+++ b/web/html/pkgbase.php
@@ -32,13 +32,6 @@ if (!isset($base_id) || !isset($pkgbase_name)) {
 /* Set the title to package base name. */
 $title = $pkgbase_name;
 
-/* Retrieve account type. */
-if (isset($_COOKIE["AURSID"])) {
-	$atype = account_from_sid($_COOKIE["AURSID"]);
-} else {
-	$atype = "";
-}
-
 /* Grab the list of package base IDs to be operated on. */
 $ids = array();
 if (isset($_POST['IDs'])) {
@@ -55,29 +48,29 @@ $ret = false;
 $output = "";
 if (check_token()) {
 	if (current_action("do_Flag")) {
-		list($ret, $output) = pkgbase_flag($atype, $ids);
+		list($ret, $output) = pkgbase_flag($ids);
 	} elseif (current_action("do_UnFlag")) {
-		list($ret, $output) = pkgbase_unflag($atype, $ids);
+		list($ret, $output) = pkgbase_unflag($ids);
 	} elseif (current_action("do_Adopt")) {
-		list($ret, $output) = pkgbase_adopt($atype, $ids, true, NULL);
+		list($ret, $output) = pkgbase_adopt($ids, true, NULL);
 	} elseif (current_action("do_Disown")) {
 		$via = isset($_POST['via']) ? $_POST['via'] : NULL;
-		list($ret, $output) = pkgbase_adopt($atype, $ids, false, $via);
+		list($ret, $output) = pkgbase_adopt($ids, false, $via);
 	} elseif (current_action("do_Vote")) {
-		list($ret, $output) = pkgbase_vote($atype, $ids, true);
+		list($ret, $output) = pkgbase_vote($ids, true);
 	} elseif (current_action("do_UnVote")) {
-		list($ret, $output) = pkgbase_vote($atype, $ids, false);
+		list($ret, $output) = pkgbase_vote($ids, false);
 	} elseif (current_action("do_Delete")) {
 		if (isset($_POST['confirm_Delete'])) {
 			$via = isset($_POST['via']) ? $_POST['via'] : NULL;
 			if (!isset($_POST['merge_Into']) || empty($_POST['merge_Into'])) {
-				list($ret, $output) = pkgbase_delete($atype, $ids, NULL, $via);
+				list($ret, $output) = pkgbase_delete($ids, NULL, $via);
 				unset($_GET['ID']);
 			}
 			else {
 				$merge_base_id = pkgbase_from_name($_POST['merge_Into']);
 				if ($merge_base_id) {
-					list($ret, $output) = pkgbase_delete($atype, $ids, $merge_base_id, $via);
+					list($ret, $output) = pkgbase_delete($ids, $merge_base_id, $via);
 					unset($_GET['ID']);
 				} else {
 					$output = __("Cannot find package to merge votes and comments into.");
@@ -90,13 +83,13 @@ if (check_token()) {
 			$ret = false;
 		}
 	} elseif (current_action("do_Notify")) {
-		list($ret, $output) = pkgbase_notify($atype, $ids);
+		list($ret, $output) = pkgbase_notify($ids);
 	} elseif (current_action("do_UnNotify")) {
-		list($ret, $output) = pkgbase_notify($atype, $ids, false);
+		list($ret, $output) = pkgbase_notify($ids, false);
 	} elseif (current_action("do_DeleteComment")) {
-		list($ret, $output) = pkgbase_delete_comment($atype);
+		list($ret, $output) = pkgbase_delete_comment();
 	} elseif (current_action("do_ChangeCategory")) {
-		list($ret, $output) = pkgbase_change_category($base_id, $atype);
+		list($ret, $output) = pkgbase_change_category($base_id);
 	} elseif (current_action("do_FileRequest")) {
 		list($ret, $output) = pkgreq_file($ids, $_POST['type'], $_POST['merge_into'], $_POST['comments']);
 	} elseif (current_action("do_CloseRequest")) {
diff --git a/web/html/pkgdel.php b/web/html/pkgdel.php
index 621c3c91..41900e40 100644
--- a/web/html/pkgdel.php
+++ b/web/html/pkgdel.php
@@ -10,13 +10,7 @@ check_sid();
 
 html_header(__("Package Deletion"));
 
-$atype = "";
-
-if (isset($_COOKIE["AURSID"])) {
-	$atype = account_from_sid($_COOKIE["AURSID"]);
-}
-
-if ($atype == "Trusted User" || $atype == "Developer"): ?>
+if (has_credential(CRED_PKGBASE_DELETE)): ?>
 <div class="box">
 	<h2><?= __('Delete Package: %s', htmlspecialchars($pkgbase_name)) ?></h2>
 	<p>
diff --git a/web/html/pkgmerge.php b/web/html/pkgmerge.php
index ba3f7424..6a3b3c57 100644
--- a/web/html/pkgmerge.php
+++ b/web/html/pkgmerge.php
@@ -10,13 +10,7 @@ check_sid();
 
 html_header(__("Package Merging"));
 
-$atype = "";
-
-if (isset($_COOKIE["AURSID"])) {
-	$atype = account_from_sid($_COOKIE["AURSID"]);
-}
-
-if ($atype == "Trusted User" || $atype == "Developer"): ?>
+if (has_credential(CRED_PKGBASE_DELETE)): ?>
 <div class="box">
 	<h2><?= __('Merge Package: %s', htmlspecialchars($pkgbase_name)) ?></h2>
 	<p>
diff --git a/web/html/pkgreq.php b/web/html/pkgreq.php
index 9dec1f6e..03b31b84 100644
--- a/web/html/pkgreq.php
+++ b/web/html/pkgreq.php
@@ -16,7 +16,7 @@ if (isset($base_id)) {
 	$pkgbase_name = pkgreq_get_pkgbase_name($pkgreq_id);
 	include('pkgreq_close_form.php');
 } else {
-	if (!check_user_privileges()) {
+	if (!has_credential(CRED_PKGREQ_LIST)) {
 		header('Location: /');
 		exit();
 	}
diff --git a/web/html/tu.php b/web/html/tu.php
index 5d4e37dc..158632a2 100644
--- a/web/html/tu.php
+++ b/web/html/tu.php
@@ -14,12 +14,7 @@ html_header($title);
 $pp = 10;
 $prev_Len = 75;
 
-$atype = "";
-if (isset($_COOKIE["AURSID"])) {
-  $atype = account_from_sid($_COOKIE["AURSID"]);
-}
-
-if ($atype == "Trusted User" || $atype == "Developer") {
+if (has_credential(CRED_TU_LIST_VOTES)) {
 
 	if (isset($_GET['id'])) {
 		if (is_numeric($_GET['id'])) {
@@ -39,7 +34,7 @@ if ($atype == "Trusted User" || $atype == "Developer") {
 				if ($isrunning == 0) {
 					$canvote = 0;
 					$errorvote = __("Voting is closed for this proposal.");
-				} else if ($atype == "Developer") {
+				} else if (!has_credential(CRED_TU_VOTE)) {
 					$canvote = 0;
 					$errorvote = __("Only Trusted Users are allowed to vote.");
 				} else if ($row['User'] == username_from_sid($_COOKIE["AURSID"])) {
diff --git a/web/html/voters.php b/web/html/voters.php
index bbcf547c..8766fa73 100644
--- a/web/html/voters.php
+++ b/web/html/voters.php
@@ -6,11 +6,10 @@ include_once('pkgfuncs.inc.php');
 $SID = $_COOKIE['AURSID'];
 $pkgname = htmlspecialchars($_GET['N']);
 $votes = pkgbase_votes_from_name($pkgname);
-$atype = account_from_sid($SID);
 
 html_header(__("Voters"));
 
-if ($atype == 'Trusted User' || $atype== 'Developer'):
+if (has_credential(CRED_PKGBASE_LIST_VOTERS)):
 ?>
 
 <div class="box">