Add settings class

1 files changed, 94 insertions, 0 deletions

diff --git a/app/class/settings.class.php b/app/class/settings.class.php
new file mode 100644
index 0000000..5609605
--- /dev/null
+++ b/app/class/settings.class.php
@@ -0,0 +1,94 @@
+<?php
+
+/*
+ * SCROTT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * For more information, please refer to UNLICENSE
+ */
+
+require_once "class/database.class.php";
+
+/*
+ * Interface for accessing and updating Scrott administrative settings
+ */
+abstract class settings
+{
+    /*
+     * Get the value stored for the given key, or NULL if key is not
+     * set.
+     */
+    private static function getValue(string $key) : ?string
+    {
+        $key = database::esc($key);
+
+        $query = "SELECT value FROM settings WHERE name = '" . $key . "'";
+        $res = database::query($query);
+
+        if (count($res) == 0)
+            return NULL;
+
+        return $res[0]['value'];
+    }
+
+    /*
+     * Store the given (key, value) pair, overwriting key in the
+     * database if already present.
+     */
+    private static function setValue(string $key, string $value) : void
+    {
+        $key = database::esc($key);
+        $value = database::esc($value);
+
+        if (self::getValue($key) === NULL)
+            $query = "INSERT INTO settings (name, value) VALUES ('" . $key . "', '" . $value . "')";
+        else
+            $query = "UPDATE settings SET value = '" . $value . "' WHERE name = '" . $key . "'";
+
+        database::query($query);
+    }
+
+    /*
+     * Get the value for an option and optionally update it.  Returns
+     * the stored value for this option, or the given default value
+     * if not found.  If a value update takes place, the new value
+     * is returned.
+     */
+    private static function option(string $key, string $deflt, ?string $value) : string
+    {
+        if ($value !== NULL)
+            self::setValue($key, $value);
+
+        if (($res = self::getValue($key)) !== NULL)
+            return $res;
+
+        return $deflt;
+    }
+
+    /*
+     * GETTERS AND SETTERS FOR GLOBAL OPTIONS ...
+     */
+
+    /*
+     * Do we force connections to use HTTPS?
+     */
+    public static function sslOnly(?bool $value = NULL) : bool
+    {
+        return self::option("sslOnly", false, $value);
+    }
+
+    /*
+     * Do we allow anybody to signup their own account?
+     */
+    public static function allowPublicSignup(?bool $value = NULL) : bool
+    {
+        return self::option("allowPublicSignup", false, $value);
+    }
+}
+
+?>