From 8ed7023cec6e6c090aa4c0776f5b30cad8f59c11 Mon Sep 17 00:00:00 2001
From: Iain Patterson <me@iain.cx>
Date: Tue, 23 Jul 2013 22:33:12 +0100
Subject: [PATCH] Framework for reports.

---
 lib/header.php |  4 ++-
 lib/report.php | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 lib/report.php

diff --git a/lib/header.php b/lib/header.php
index 75cd167..0582fcb 100644
--- a/lib/header.php
+++ b/lib/header.php
@@ -19,8 +19,10 @@
 <a href="/hub">Hubs</a>
 /
 <a href="/donation">Donations</a>
+/
+<a href="/report">Reports</a>
 
-<strong><em><?php echo $username; ?></em>@<?php echo $charity; ?></strong>
+<strong class="small"><em><?php echo $username; ?></em>@<?php echo $charity; ?></strong>
 <a href="/logout" class="smaller">logout</a>
 <?php } else echo "<strong>$charity</strong>"; ?>
 </p>
diff --git a/lib/report.php b/lib/report.php
new file mode 100644
index 0000000..e74ac07
--- /dev/null
+++ b/lib/report.php
@@ -0,0 +1,83 @@
+<?php
+
+  if (isset($_POST['show_reports'])) {
+    header(sprintf("Location: http%s://%s/%s/from/%s/to/%s", ($_SERVER['HTTPS']) ? "s" : "", $_SERVER['HTTP_HOST'], $module, $_POST['from'], $_POST['to']));
+    exit;
+  }
+
+  function show_reports_form($from = null, $to = null) {
+    form("noprint standout");
+    echo "<p>Show reports covering the period from ";
+
+    /* Default to last month. */
+    list($y, $m, $d) = explode('-', date('Y-m-d', time()));
+    $latest = "$y-$m-$d";
+    $now = mktime(0, 0, 0, $m, $d, $y);
+    $first = mktime(0, 0, 0, $m, 1, $y);
+    $last = $first - 86400;
+    $date = date('Y-m-d', $last);
+    if (is_null($to)) $to = $date;
+    list($y, $m, $d) = explode('-', $date);
+    $first = mktime(0, 0, 0, $m, 1, $y);
+    if (is_null($from)) $from = date('Y-m-d', $first);
+    $date = $first;
+    for ($i = 0; $i < 2; $i++) {
+      $date -= 86400;
+      list ($y, $m, $d) = explode('-', date('Y-m-d', $date));
+      $date = mktime(0, 0, 0, $m, 1, $y);
+    }
+    $oldest = date('Y-m-d', $date);
+    $then = $date;
+
+    echo "<select name=\"from\">\n";
+    for ($date = $then; $date <= $now; $date += 86400) {
+      option("from", date('Y-m-d', $date), date('j F Y', $date), $from);
+    }
+    echo "</select> to <select name=\"to\">\n";
+    for ($date = $then; $date <= $now; $date += 86400) {
+      option("to", date('Y-m-d', $date), date('j F Y', $date), $to);
+    }
+    echo "</select>\n";
+
+    submit("show_reports", "Show");
+    end_form();
+  }
+
+  function check_report_dates($from, $to) {
+    list($y, $m, $d) = explode('-', $from);
+    if (! checkdate($m, $d, $y)) {
+      echo "<p>Invalid report start date!</p>\n";
+      return false;
+    }
+    $start = mktime(0, 0, 0, $m, $d, $y);
+
+    list($y, $m, $d) = explode('-', $to);
+    if (! checkdate($m, $d, $y)) {
+      echo "<p>Invalid report end date!</p>\n";
+      return false;
+    }
+    $end = mktime(0, 0, 0, $m, $d, $y);
+
+    if ($end < $start) {
+      echo "<p>Report end date is earlier than start date!</p>\n";
+      return false;
+    }
+
+    return true;
+  }
+
+  function show_reports($from, $to) {
+    if (! check_report_dates($from, $to)) return;
+
+    echo "<p>Showing reports for the period <strong>$from</strong> to <strong>$to</strong>.</p>\n";
+  }
+
+  if (count($parameters)) {
+    if ($parameters[0] == "from") {
+      $from = $parameters[1];
+      if ($parameters[2] == "to") $to = $parameters[3];
+      show_reports($from, $to);
+    }
+  }
+  show_reports_form($from, $to);
+?>
-- 
2.20.1