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-rw-r--r--application/Config.php221
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diff --git a/application/Config.php b/application/Config.php
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1<?php
2/**
3 * Functions related to configuration management.
4 */
5
6/**
7 * Re-write configuration file according to given array.
8 * Requires mandatory fields listed in $MANDATORY_FIELDS.
9 *
10 * @param array $config contains all configuration fields.
11 * @param bool $isLoggedIn true if user is logged in.
12 *
13 * @return void
14 *
15 * @throws MissingFieldConfigException: a mandatory field has not been provided in $config.
16 * @throws UnauthorizedConfigException: user is not authorize to change configuration.
17 * @throws Exception: an error occured while writing the new config file.
18 */
19function writeConfig($config, $isLoggedIn)
20{
21 // These fields are required in configuration.
22 $MANDATORY_FIELDS = array(
23 'login', 'hash', 'salt', 'timezone', 'title', 'titleLink',
24 'redirector', 'disablesessionprotection', 'privateLinkByDefault'
25 );
26
27 if (!isset($config['config']['CONFIG_FILE'])) {
28 throw new MissingFieldConfigException('CONFIG_FILE');
29 }
30
31 // Only logged in user can alter config.
32 if (is_file($config['config']['CONFIG_FILE']) && !$isLoggedIn) {
33 throw new UnauthorizedConfigException();
34 }
35
36 // Check that all mandatory fields are provided in $config.
37 foreach ($MANDATORY_FIELDS as $field) {
38 if (!isset($config[$field])) {
39 throw new MissingFieldConfigException($field);
40 }
41 }
42
43 $configStr = '<?php '. PHP_EOL;
44 $configStr .= '$GLOBALS[\'login\'] = '.var_export($config['login'], true).';'. PHP_EOL;
45 $configStr .= '$GLOBALS[\'hash\'] = '.var_export($config['hash'], true).';'. PHP_EOL;
46 $configStr .= '$GLOBALS[\'salt\'] = '.var_export($config['salt'], true).'; '. PHP_EOL;
47 $configStr .= '$GLOBALS[\'timezone\'] = '.var_export($config['timezone'], true).';'. PHP_EOL;
48 $configStr .= 'date_default_timezone_set('.var_export($config['timezone'], true).');'. PHP_EOL;
49 $configStr .= '$GLOBALS[\'title\'] = '.var_export($config['title'], true).';'. PHP_EOL;
50 $configStr .= '$GLOBALS[\'titleLink\'] = '.var_export($config['titleLink'], true).'; '. PHP_EOL;
51 $configStr .= '$GLOBALS[\'redirector\'] = '.var_export($config['redirector'], true).'; '. PHP_EOL;
52 $configStr .= '$GLOBALS[\'disablesessionprotection\'] = '.var_export($config['disablesessionprotection'], true).'; '. PHP_EOL;
53 $configStr .= '$GLOBALS[\'privateLinkByDefault\'] = '.var_export($config['privateLinkByDefault'], true).'; '. PHP_EOL;
54
55 // Store all $config['config']
56 foreach ($config['config'] as $key => $value) {
57 $configStr .= '$GLOBALS[\'config\'][\''. $key .'\'] = '.var_export($config['config'][$key], true).';'. PHP_EOL;
58 }
59
60 if (isset($config['plugins'])) {
61 foreach ($config['plugins'] as $key => $value) {
62 $configStr .= '$GLOBALS[\'plugins\'][\''. $key .'\'] = '.var_export($config['plugins'][$key], true).';'. PHP_EOL;
63 }
64 }
65
66 if (!file_put_contents($config['config']['CONFIG_FILE'], $configStr)
67 || strcmp(file_get_contents($config['config']['CONFIG_FILE']), $configStr) != 0
68 ) {
69 throw new Exception(
70 'Shaarli could not create the config file.
71 Please make sure Shaarli has the right to write in the folder is it installed in.'
72 );
73 }
74}
75
76/**
77 * Process plugin administration form data and save it in an array.
78 *
79 * @param array $formData Data sent by the plugin admin form.
80 *
81 * @return array New list of enabled plugin, ordered.
82 *
83 * @throws PluginConfigOrderException Plugins can't be sorted because their order is invalid.
84 */
85function save_plugin_config($formData)
86{
87 // Make sure there are no duplicates in orders.
88 if (!validate_plugin_order($formData)) {
89 throw new PluginConfigOrderException();
90 }
91
92 $plugins = array();
93 $newEnabledPlugins = array();
94 foreach ($formData as $key => $data) {
95 if (startsWith($key, 'order')) {
96 continue;
97 }
98
99 // If there is no order, it means a disabled plugin has been enabled.
100 if (isset($formData['order_' . $key])) {
101 $plugins[(int) $formData['order_' . $key]] = $key;
102 }
103 else {
104 $newEnabledPlugins[] = $key;
105 }
106 }
107
108 // New enabled plugins will be added at the end of order.
109 $plugins = array_merge($plugins, $newEnabledPlugins);
110
111 // Sort plugins by order.
112 if (!ksort($plugins)) {
113 throw new PluginConfigOrderException();
114 }
115
116 $finalPlugins = array();
117 // Make plugins order continuous.
118 foreach ($plugins as $plugin) {
119 $finalPlugins[] = $plugin;
120 }
121
122 return $finalPlugins;
123}
124
125/**
126 * Validate plugin array submitted.
127 * Will fail if there is duplicate orders value.
128 *
129 * @param array $formData Data from submitted form.
130 *
131 * @return bool true if ok, false otherwise.
132 */
133function validate_plugin_order($formData)
134{
135 $orders = array();
136 foreach ($formData as $key => $value) {
137 // No duplicate order allowed.
138 if (in_array($value, $orders)) {
139 return false;
140 }
141
142 if (startsWith($key, 'order')) {
143 $orders[] = $value;
144 }
145 }
146
147 return true;
148}
149
150/**
151 * Affect plugin parameters values into plugins array.
152 *
153 * @param mixed $plugins Plugins array ($plugins[<plugin_name>]['parameters']['param_name'] = <value>.
154 * @param mixed $config Plugins configuration.
155 *
156 * @return mixed Updated $plugins array.
157 */
158function load_plugin_parameter_values($plugins, $config)
159{
160 $out = $plugins;
161 foreach ($plugins as $name => $plugin) {
162 if (empty($plugin['parameters'])) {
163 continue;
164 }
165
166 foreach ($plugin['parameters'] as $key => $param) {
167 if (!empty($config[$key])) {
168 $out[$name]['parameters'][$key] = $config[$key];
169 }
170 }
171 }
172
173 return $out;
174}
175
176/**
177 * Exception used if a mandatory field is missing in given configuration.
178 */
179class MissingFieldConfigException extends Exception
180{
181 public $field;
182
183 /**
184 * Construct exception.
185 *
186 * @param string $field field name missing.
187 */
188 public function __construct($field)
189 {
190 $this->field = $field;
191 $this->message = 'Configuration value is required for '. $this->field;
192 }
193}
194
195/**
196 * Exception used if an unauthorized attempt to edit configuration has been made.
197 */
198class UnauthorizedConfigException extends Exception
199{
200 /**
201 * Construct exception.
202 */
203 public function __construct()
204 {
205 $this->message = 'You are not authorized to alter config.';
206 }
207}
208
209/**
210 * Exception used if an error occur while saving plugin configuration.
211 */
212class PluginConfigOrderException extends Exception
213{
214 /**
215 * Construct exception.
216 */
217 public function __construct()
218 {
219 $this->message = 'An error occurred while trying to save plugins loading order.';
220 }
221}
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