X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=persistent.php;fp=persistent.php;h=cc12028e15a14083fa407a8ce35a96ec3e8b6d8c;hb=7c4549b936855f1d655ee1933f458817bd03e82a;hp=0000000000000000000000000000000000000000;hpb=63853e1feaf55ab5542f06de4e914af24e8cc3e3;p=wfpl.git

diff --git a/persistent.php b/persistent.php
new file mode 100644
index 0000000..cc12028
--- /dev/null
+++ b/persistent.php
@@ -0,0 +1,44 @@
+<?php
+
+# a simple, persistent, key/value store optimized for many reads
+#
+# call persistent_{get,set,clear}
+
+# for internal use
+function persistent_init() {
+	if (isset($GLOBALS['wfpl_persistent'])) {
+		return;
+	}
+	$GLOBALS['wfpl_persistent'] = array();
+	$rows = db_get_rows('persistent', 'k,v');
+	foreach ($rows as &$row) {
+		$GLOBALS['wfpl_persistent'][$row[0]] = json_decode($row[1], true);
+	} unset($row);
+}
+
+function persistent_get($k) {
+	persistent_init();
+	if (isset($GLOBALS['wfpl_persistent'][$k])) {
+		return $GLOBALS['wfpl_persistent'][$k];
+	}
+	return null;
+}
+function persistent_set($k, $v) {
+	persistent_init();
+	if (isset($GLOBALS['wfpl_persistent'][$k])) {
+		if ($GLOBALS['wfpl_persistent'][$k] === $v) {
+			return;
+		}
+		db_update('persistent', 'v', json_encode($v), 'where k=%"', $k);
+	} else {
+		db_insert('persistent', 'k,v', $k, json_encode($v));
+	}
+	$GLOBALS['wfpl_persistent'][$k] = $v;
+}
+function persistent_clear($k) {
+	persistent_init();
+	if (isset($GLOBALS['wfpl_persistent'][$k])) {
+		db_delete('persistent', 'where k=%"', $k);
+		unset($GLOBALS['wfpl_persistent'][$k]);
+	}
+}