X-Git-Url: http://git.iain.cx/?a=blobdiff_plain;f=lib%2Ffunctions.php;h=2fcbe0e493e3dace99565a6bbb75e9bdf7674e4b;hb=3b2e8214805eb2bdebb7485ce29c072815361eef;hp=73ea46443743007dd483b8a2d5d80bc6dd888516;hpb=1fb7460a871d2342eca8a99d5e6a4af26c019372;p=readifood.git

diff --git a/lib/functions.php b/lib/functions.php
index 73ea464..2fcbe0e 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -486,32 +486,54 @@
   }
 
   function show_date_form($name, $date = null) {
-    $past = 60;
-    $future = 60;
-    echo "<select name=\"$name\">\n";
-    $now = date('Y-m-d', time());
-    list($y, $m, $d) = explode('-', $now);
-    $today = mktime(0, 0, 0, $m, $d, $y);
-    if (isset($date)) {
-      list($y, $m, $d) = explode('-', $date);
-      $then = mktime(0, 0, 0, $m, $d, $y);
-      if ($then < $today - 86400 * $past || $then > $today + 86400 * $future) {
-        option($name, $date, date('l j F Y', $then), $date);
-      }
+    if (! isset($date)) $date = date('Y-m-d', time());
+    datepicker($name, $date);
+  }
+
+  function validate_postcode($postcode, &$outward = null, &$inward = null) {
+    /*
+      Valid postcode formats (BS7666):
+
+        AN NLL
+        ABN NLL
+        ANN NLL
+        ABNN NLL
+        ABND NLL
+        ANC NLL
+
+      Where N is a number; A is a letter not including Q, V, X;
+      B is a letter not including I, J, Z; C is a letter from the set
+      ABCDEFGHJKSTUW; D is a letter from the set ABEHMNPRVWXY;
+      L is a letter from the set ABDEFGHJLNPQRSTUWXYZ.
+
+      The postcode GIR 0AA is also valid.
+    */
+    $outward = $inward = null;
+
+    /* Treat blank as valid for convenience. */
+    $postcode = trim($postcode);
+    if (! $postcode) return true;
+
+    $A = '[ABCDEFGHIJKLMNOPRSTUWYZ]';
+    $B = '[ABCDEFGHKLMNOPQRSTUVWXY]';
+    $C = '[ABCDEFGHJKSTUW]';
+    $D = '[ABEHMNPRVWXY]';
+    $L = '[ABDEFGHJLNPQRSTUWXYZ]';
+    $N = '\d';
+    if (! preg_match("/^($A$N|$A$B$N|$A$N$N|$A$B$N$N|$A$B$N$D|$A$N$C|GIR)\s*($N$L$L)$/", $postcode, $m)) return false;
+    if ($m[1] == "GIR" && $m[2] != "0AA") return false;
+    list($ignored, $outward, $inward) = $m;
+    return true;
+  }
+
+  function format_postcode($postcode, $complain = true) {
+    if (validate_postcode($postcode, $outward, $inward)) {
+      return "$outward $inward";
     }
-    else $date = $now;
-    for ($i = -$past; $i < $future; $i++) {
-      $then = $today + 86400 * $i;
-      option($name, date('Y-m-d', $then), date('l j F Y', $then), $date);
+    if ($complain) {
+      echo "<p>Invalid postcode!</p>\n";
+      return null;
     }
-    echo "</select>\n";
-    return;
-    if (! isset($date)) $date = date('Y-m-d');
-    list($y, $m, $d) = iso8601_to_ymd($date);
-
-    echo "Year: <input name=\"$name" . "_y\" value=\"$y\" size=4 maxlen=4> ";
-    echo "Month: <input name=\"$name" . "_m\" value=\"$m\" size=2 maxlen=2> ";
-    echo "Day: <input name=\"$name" . "_d\" value=\"$d\" size=2 maxlen=2> ";
   }
 
   function get_small_link() {