first commit

php/html-components.php

@@ -0,0 +1,73 @@
+<?php
+
+$_ERRORS = [];
+
+/**
+ * Adds an error to the $_ERROR array to be displayed at the end
+ * of a PHP script as HTML dialogs
+ * 
+ * @param string $message Error message
+ */
+function showError ($message) {
+    if ($message == "") return;
+
+    $message = str_replace("\n", "<br>", $message);
+    $message = str_replace(" ", "&nbsp;", $message);
+
+    global $_ERRORS;
+    $_ERRORS[] = $message;
+}
+
+/**
+ * Write text into stderr
+ * 
+ * @param string $text Text to log
+ */
+function debug ($text) {
+    error_log("\n> $text" . PHP_EOL);
+}
+
+/**
+ * Echoes HTML code to display all collected error messages
+ */
+function insertErrorsHtml() {
+    global $_ERRORS;
+
+    if (count ($_ERRORS) == 0) return;
+
+    // Dialog frame HTML
+    $base_html = '
+        <div class="dialog-parent">
+            <div class="dialog">
+                <div class="dialog-content">
+                    <b>Fehler beim Laden der Seite:</b><br>
+                    <br>
+                    %s
+                </div>
+                <div class="dialog-buttons">
+                    <button onclick="closeDialog(this)">OK</button>
+                </div>
+            </div>
+        </div>
+    ';
+
+    $errors_html = "";
+
+    foreach ($_ERRORS as $error) {
+        $errors_html .= "{$error}<br>";
+    }
+
+    printf ($base_html, $errors_html);
+}
+
+/**
+ * Hides the dialog box asking for an ICS URL if one
+ * was already specified by the user
+ */
+function hideMissingIcsDialog () {
+    global $_GET;
+
+    if (isset ($_GET["ics_url"]) && $_GET["ics_url"] != "") {
+        echo "hidden";
+    }
+}