From 0ac364670ab5611c31c25657f540c85d59a9333d Mon Sep 17 00:00:00 2001
From: vince <vince@caboulot.org>
Date: Sun, 28 Nov 2021 22:10:45 +0100
Subject: [PATCH] =?UTF-8?q?impl=C3=A9mente=20une=20preuve=20de=20concept?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore |   2 +
 README.md  |  15 +++++-
 index.php  | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 172 insertions(+), 1 deletion(-)
 create mode 100644 .gitignore
 create mode 100644 index.php

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..dcf32a9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+data.php
+config.php
diff --git a/README.md b/README.md
index 74790aa..f0bc877 100644
--- a/README.md
+++ b/README.md
@@ -19,4 +19,17 @@ bien utile) et le stockage de données directement dans les sources.
 
 Le contexte serait le tiers et l'événement concerné. Pour un contexte donné on
 peut s'inscrire et se désinscrire. Via la configuration on peut cadrer la
-récurrence des événements ainsi que leschoix disponibles à l'inscription. 
+récurrence des événements ainsi que les choix disponibles à l'inscription. 
+
+## test
+
+On peut tester en local avec le serveur PHP embarqué et la commande `php -S
+localhost:8000 -t .` à la racine du projet puis en lançant un navigateur pour
+visiter `localhost:8000`.
+
+## todo
+
+* gérer les erreur potentielles partout où c'est susceptible d'arriver et afficher de jolis messages explicites si ça se produit
+* prévoir un accueil avec le liste des suppliers ?
+* prévoir un export ics des événements (synchro caldendrier téléphone) selon le HTTP_ACCEPT
+* prévoir une interface d'admin qui créérait le config.php à la volée avec protection par auth basic si on met un mot de passe
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..147ba6f
--- /dev/null
+++ b/index.php
@@ -0,0 +1,156 @@
+<?php
+
+$requestUrl = trim(str_replace($_SERVER['QUERY_STRING'], '', $_SERVER['REQUEST_URI']), '?');
+
+define('CONFIG_FILE', __DIR__ . DIRECTORY_SEPARATOR . 'config.php');
+define('DATA_FILE', __DIR__ . DIRECTORY_SEPARATOR . 'data.php');
+
+if (file_exists(CONFIG_FILE)) require_once CONFIG_FILE;
+if (!isset($config)) $config = [];
+
+$supplier = $_REQUEST['supplier'];
+
+if (!isset($config[$supplier]))
+	$config[$supplier] = [];
+
+$config[$supplier] = array_merge(
+	[
+		'title' => '%supplier% <small>%event%</small>',
+		'description' => '',
+		'choices' => [],
+		'start' => 'now 00:00:00',
+		'end' => '+1 year',
+		'frequency' => '1 day',
+
+	],
+	$config[$supplier]
+);
+
+$action = isset($_REQUEST['action']) ? $_REQUEST['action'] : null;
+
+$hasEvent = isset($_REQUEST['event']);
+if (!$hasEvent) {
+	$now = new \DateTime('now');
+	$current = new \DateTime($config[$supplier]['start']);
+	$frequency = \DateInterval::createFromDateString($config[$supplier]['frequency']);
+	$maxIterations = 1000;
+	while (
+		($current->getTimestamp() < $now->getTimestamp())
+		and ($maxIterations-- > 0)
+	) $current->add($frequency);
+	$nextEvent = $current->format('Y-m-d');
+	header(sprintf('Location: %s?supplier=%s&event=%s', $requestUrl, $supplier, $nextEvent));
+	die();
+}
+
+$event = $_REQUEST['event'];
+
+switch ($action) {
+case 'insert' :
+case 'delete' :
+	$isBeginning = (!file_exists(DATA_FILE) or in_array(filesize(DATA_FILE), [ false, 0 ]));
+	$output = fopen(DATA_FILE, 'a+');
+	if (!$output) break;
+	if (!flock($output, LOCK_EX)) break;
+	if ($isBeginning)
+		fwrite($output, '<?php' . PHP_EOL);
+	$item = [];
+	foreach (['name', 'choice', 'action'] as $field)
+		$item[$field] = $_REQUEST[$field];
+	$item['timestamp'] = time();
+	$item['hash'] = md5(implode([ $item['name'], $item['choice'], ]));
+	fprintf(
+		$output,
+		'$data[%s][%s][] = %s;' . PHP_EOL,
+		var_export($supplier, true),
+		var_export($event, true),
+		str_replace(PHP_EOL, '', var_export($item, true))
+	);
+	flock($output, LOCK_UN);
+	fclose($output);
+	header(sprintf('Location: %s?supplier=%s&event=%s', $requestUrl, $supplier, $event));
+	die();
+}
+
+if (!isset($data)) $data = [];
+if (file_exists(DATA_FILE)) include DATA_FILE;
+
+$items = [];
+
+$allItems = isset($data[$supplier][$event]) ? $data[$supplier][$event] : [];
+
+usort($allItems, function ($a, $b) {
+	$a = intval($a['timestamp']);
+	$b = intval($b['timestamp']);
+	if ($a === $b)
+		return 0;
+	return ($a < $b) ? -1 : 1;
+});
+
+foreach ($allItems as $item) {
+	if ($item['action'] === 'insert') {
+		$items[] = $item;
+	} elseif ($item['action'] === 'delete') {
+		foreach ($items as $index => $prevItem)
+			if ($prevItem['hash'] === $item['hash'])
+				unset($items[$index]);
+	}
+}
+
+while (preg_match('/%([^%]+)%/i', $config[$supplier]['title'], $match))
+	$config[$supplier]['title'] = str_replace(
+		$match[0],
+		${$match[1]},
+		$config[$supplier]['title']
+	);
+
+
+?><!DOCTYPE html>
+<html lang="fr">
+	<head>
+		<meta charset="UTF-8" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		<title><?php echo strip_tags($config[$supplier]['title']); ?></title>
+	</head>
+	<body>
+		<h1><?php echo $config[$supplier]['title']; ?></h1>
+		<?php if (!empty($config[$supplier]['description'])) : ?>
+		<p><?php echo $config[$supplier]['description']; ?></p>
+		<?php endif; ?>
+		<ul>
+			<?php foreach ($items as $item) : ?>
+			<li>
+				<form>
+					<input type="hidden" name="supplier" value="<?php echo $supplier; ?>" />
+					<input type="hidden" name="event" value="<?php echo $event; ?>" />
+					<input type="hidden" name="name" value="<?php echo $item['name']; ?>" />
+					<input type="hidden" name="choice" value="<?php echo $item['choice']; ?>" />
+					<?php echo $item['name']; ?>
+					<?php if (!empty($item['choice'])) : ?>
+					— <?php echo $item['choice']; ?>
+					<?php endif; ?>
+					<button type="submit" name="action" value="delete">supprimer</button>
+				</form>
+			</li>
+  			<?php endforeach; ?>
+			<li>
+				<form>
+					<input type="hidden" name="supplier" value="<?php echo $supplier; ?>" />
+					<input type="hidden" name="event" value="<?php echo $event; ?>" />
+					<input type="text" name="name" required placeholder="nom" />
+					<?php if (empty($config[$supplier]['choices'])) : ?>
+					<input type="hidden" name="choice" value="<?php echo $item['choice']; ?>" />
+					<?php else : ?>
+					<select name="choice" required placeholder="choix">
+						<option/>
+						<?php foreach ($config[$supplier]['choices'] as $choice) : ?>
+						<option><?php echo $choice; ?></option>
+						<?php endforeach; ?>
+					</select>
+					<?php endif; ?>
+					<button type="submit" name="action" value="insert">ajouter</button>
+				</form>
+			</li>
+		</ul>
+	</body>
+</html>