Introduce a configuration manager (not plugged yet)

1 files changed, 118 insertions, 0 deletions

diff --git a/application/config/ConfigPlugin.php b/application/config/ConfigPlugin.php
new file mode 100644
index 00000000..8af89d04
--- /dev/null
+++ b/application/config/ConfigPlugin.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Functions related to configuration management.
+ */
+
+/**
+ * Process plugin administration form data and save it in an array.
+ *
+ * @param array $formData Data sent by the plugin admin form.
+ *
+ * @return array New list of enabled plugin, ordered.
+ *
+ * @throws PluginConfigOrderException Plugins can't be sorted because their order is invalid.
+ */
+function save_plugin_config($formData)
+{
+    // Make sure there are no duplicates in orders.
+    if (!validate_plugin_order($formData)) {
+        throw new PluginConfigOrderException();
+    }
+
+    $plugins = array();
+    $newEnabledPlugins = array();
+    foreach ($formData as $key => $data) {
+        if (startsWith($key, 'order')) {
+            continue;
+        }
+
+        // If there is no order, it means a disabled plugin has been enabled.
+        if (isset($formData['order_' . $key])) {
+            $plugins[(int) $formData['order_' . $key]] = $key;
+        }
+        else {
+            $newEnabledPlugins[] = $key;
+        }
+    }
+
+    // New enabled plugins will be added at the end of order.
+    $plugins = array_merge($plugins, $newEnabledPlugins);
+
+    // Sort plugins by order.
+    if (!ksort($plugins)) {
+        throw new PluginConfigOrderException();
+    }
+
+    $finalPlugins = array();
+    // Make plugins order continuous.
+    foreach ($plugins as $plugin) {
+        $finalPlugins[] = $plugin;
+    }
+
+    return $finalPlugins;
+}
+
+/**
+ * Validate plugin array submitted.
+ * Will fail if there is duplicate orders value.
+ *
+ * @param array $formData Data from submitted form.
+ *
+ * @return bool true if ok, false otherwise.
+ */
+function validate_plugin_order($formData)
+{
+    $orders = array();
+    foreach ($formData as $key => $value) {
+        // No duplicate order allowed.
+        if (in_array($value, $orders)) {
+            return false;
+        }
+
+        if (startsWith($key, 'order')) {
+            $orders[] = $value;
+        }
+    }
+
+    return true;
+}
+
+/**
+ * Affect plugin parameters values into plugins array.
+ *
+ * @param mixed $plugins Plugins array ($plugins[<plugin_name>]['parameters']['param_name'] = <value>.
+ * @param mixed $conf  Plugins configuration.
+ *
+ * @return mixed Updated $plugins array.
+ */
+function load_plugin_parameter_values($plugins, $conf)
+{
+    $out = $plugins;
+    foreach ($plugins as $name => $plugin) {
+        if (empty($plugin['parameters'])) {
+            continue;
+        }
+
+        foreach ($plugin['parameters'] as $key => $param) {
+            if (!empty($conf[$key])) {
+                $out[$name]['parameters'][$key] = $conf[$key];
+            }
+        }
+    }
+
+    return $out;
+}
+
+/**
+ * Exception used if an error occur while saving plugin configuration.
+ */
+class PluginConfigOrderException extends Exception
+{
+    /**
+     * Construct exception.
+     */
+    public function __construct()
+    {
+        $this->message = 'An error occurred while trying to save plugins loading order.';
+    }
+}