1 files changed, 148 insertions, 0 deletions
diff --git a/Zotlabs/Access/AccessList.php b/Zotlabs/Access/AccessList.php
new file mode 100644
index 000000000..bff7fad5e
--- /dev/null
+++ b/Zotlabs/Access/AccessList.php
@@ -0,0 +1,148 @@
+<?php
+namespace Zotlabs\Access;
+
+class AccessList {
+
+	private $allow_cid;
+	private $allow_gid;
+	private $deny_cid;
+	private $deny_gid;
+
+	/* indicates if we are using the default constructor values or values that have been set explicitly. */
+
+	private $explicit; 
+
+	function __construct($channel) {
+
+		if($channel) {		
+			$this->allow_cid = $channel['channel_allow_cid'];
+			$this->allow_gid = $channel['channel_allow_gid'];
+			$this->deny_cid  = $channel['channel_deny_cid'];
+			$this->deny_gid  = $channel['channel_deny_gid'];
+		}
+		else {
+			$this->allow_cid = '';
+			$this->allow_gid = '';
+			$this->deny_cid  = '';
+			$this->deny_gid  = '';
+		}
+
+		$this->explicit = false;
+	}
+
+	function get_explicit() {
+		return $this->explicit;
+	}
+
+	/**
+	 * Set AccessList from strings such as those in already
+	 * existing stored data items
+	 */
+
+	function set($arr,$explicit = true) {
+		$this->allow_cid = $arr['allow_cid'];
+		$this->allow_gid = $arr['allow_gid'];
+		$this->deny_cid  = $arr['deny_cid'];
+		$this->deny_gid  = $arr['deny_gid'];
+
+		$this->explicit = $explicit;
+	}
+
+	/**
+	 * return an array consisting of the current
+	 * access list components where the elements
+	 * are directly storable. 
+	 */
+
+	function get() {
+		return array(
+			'allow_cid' => $this->allow_cid,
+			'allow_gid' => $this->allow_gid,
+			'deny_cid'  => $this->deny_cid,
+			'deny_gid'  => $this->deny_gid,
+		);
+	}
+
+	/**
+	 * Set AccessList from arrays, such as those provided by
+	 * acl_selector(). For convenience, a string (or non-array) input is 
+	 * assumed to be a comma-separated list and auto-converted into an array. 
+	 */ 
+
+	function set_from_array($arr,$explicit = true) {
+		$this->allow_cid = perms2str((is_array($arr['contact_allow'])) 
+			? $arr['contact_allow'] : explode(',',$arr['contact_allow']));
+		$this->allow_gid = perms2str((is_array($arr['group_allow']))
+			? $arr['group_allow'] : explode(',',$arr['group_allow']));
+		$this->deny_cid  = perms2str((is_array($arr['contact_deny']))
+			? $arr['contact_deny'] : explode(',',$arr['contact_deny']));
+		$this->deny_gid  = perms2str((is_array($arr['group_deny']))
+			? $arr['group_deny'] : explode(',',$arr['group_deny']));
+
+		$this->explicit = $explicit;
+	}
+
+	function is_private() {
+		return (($this->allow_cid || $this->allow_gid || $this->deny_cid || $this->deny_gid) ? true : false);
+	}
+
+}
+
+/**
+ * @brief Used to wrap ACL elements in angle brackets for storage.
+ *
+ * @param[in,out] array &$item
+ */
+function sanitise_acl(&$item) {
+	if (strlen($item))
+		$item = '<' . notags(trim($item)) . '>';
+	else
+		unset($item);
+}
+
+/**
+ * @brief Convert an ACL array to a storable string.
+ *
+ * @param array $p
+ * @return array
+ */
+function perms2str($p) {
+	$ret = '';
+
+	if (is_array($p))
+		$tmp = $p;
+	else
+		$tmp = explode(',', $p);
+
+	if (is_array($tmp)) {
+		array_walk($tmp, 'sanitise_acl');
+		$ret = implode('', $tmp);
+	}
+
+	return $ret;
+}
+
+
+/**
+ * @brief Turn user/group ACLs stored as angle bracketed text into arrays.
+ *
+ * turn string array of angle-bracketed elements into string array
+ * e.g. "<123xyz><246qyo><sxo33e>" => array(123xyz,246qyo,sxo33e);
+ *
+ * @param string $s
+ * @return array
+ */
+function expand_acl($s) {
+	$ret = array();
+
+	if(strlen($s)) {
+		$t = str_replace('<','',$s);
+		$a = explode('>',$t);
+		foreach($a as $aa) {
+			if($aa)
+				$ret[] = $aa;
+		}
+	}
+
+	return $ret;
+}