1 files changed, 78 insertions, 6 deletions
diff --git a/visitors.php b/visitors.php
index 2b5001b..5707482 100644
--- a/visitors.php
+++ b/visitors.php
@@ -7,9 +7,9 @@ define('GIT_REPO', 'https://git.aleteoryx.me/cgit/visitors_dot_php/');
 
 /* CONFIG OPTIONS - COSMETIC */
 
-// Custom CSS: string
+// Custom CSS: ?string
 //
-// Will be injected below the builtin CSS. Respects `use_path_info` when being served.
+// Will be injected after the builtin CSS. Respects `use_path_info` when being served.
 
 //$config['custom_css'] = 'body { background: red; }';
 
@@ -18,7 +18,7 @@ define('GIT_REPO', 'https://git.aleteoryx.me/cgit/visitors_dot_php/');
 //
 // Toggles the builtin CSS
 
-$config['builtin_css'] = TRUE;
+$config['builtin_css'] = true;
 
 
 // Form mode: choice
@@ -44,7 +44,7 @@ $config['form_mode'] = 0;
 $config['email_display'] = 0;
 
 
-// E-Mail icon: string
+// E-Mail icon: ?string
 //
 // Should be the link to an icon for email display modes 0 and 1. Supports base64. If null or empty, defaults to a builtin image.
 
@@ -55,10 +55,11 @@ $config['email_display'] = 0;
 
 // Send assets via PATH_INFO: bool
 //
-// If true, assets like CSS, GIFs, etc, will be served from `/visitors.php/foo.css`.
+// If true, assets like CSS, GIFs, etc, will be served from URLs like `/visitors.php/foo.css`.
 // Otherwise, inline them into a single HTML document.
+// Only enable this if your webserver supports PATH_INFO.
 
-$config['use_path_info'] = FALSE;
+$config['use_path_info'] = false;
 
 
 // Database path: string
@@ -76,3 +77,74 @@ $config['db'] = 'visitors.csv';
 /* --- END OF CONFIG, CODE BELOW, PROBABLY DON'T EDIT PAST THIS POINT --- */
 
 
+// db_row: ['id' => int (only for list_rows), 'name' => string, 'message' => string, 'email' => ?string, 'website' => ?string, 'timestamp' => string (or DateTimeInterface for list_rows)]
+// message is pre-escaped at insert time.
+// timestamp is DateTimeInterface::ISO8601_EXPANDED format.
+
+abstract class Database {
+  public function append_row(string $name, string $message, ?string $email = NULL, ?string $website = NULL) {
+    $timestamp = date(DATE_ISO8601_EXPANDED);
+    $this->_append_row(compact('name', 'message', 'email', 'website', 'timestamp'));
+  }
+
+  public function list_rows(): array {
+    $data = $this->_list_rows();
+    foreach($data as &$row) {
+      $row['timestamp'] = DateTime::createFromFormat(DATE_ISO8601_EXPANDED, $row['timestamp']);
+    }
+    return $data;
+  }
+
+  public function delete_row(int $id): bool {
+    return $this->_delete_row($id);
+  }
+
+  abstract protected function _append_row(array $db_row);
+  abstract protected function _list_rows(): array;
+  abstract protected function _delete_row(int $id): bool;
+}
+
+// notes: `id` is not stable
+final class JsonDatabase extends Database {
+  private string $file;
+  private array $data;
+
+  public function __construct(string $file) {
+    if (file_exists($file))
+      $this->data = json_decode(file_get_contents($file), associative: true);
+    else
+      $this->data = array();
+
+    $this->file = $file;
+  }
+
+  private function save() {
+    file_put_contents($this->file, json_encode($this->data));
+  }
+
+  protected function _append_row(array $db_row) {
+    array_unshift($this->data, $db_row);
+    $this->save();
+  }
+
+  protected function _list_rows(): array {
+    $data = $this->data;
+
+    foreach($data as $id => &$row) {
+      $row['id'] = $id;
+    }
+
+    return $data;
+  }
+
+  protected function _delete_row(int $id): bool {
+    if (!isset($this->data[$id]))
+      return false;
+
+    unset($this->data[$id]);
+    $this->data = array_values($this->data);
+    $this->save();
+
+    return true;
+  }
+}