From 9c586a3b301f2f850df54af928da50104ce14632 Mon Sep 17 00:00:00 2001
From: Boone B Gorges <boonebgorges@gmail.com>
Date: Mon, 30 Jun 2014 20:32:51 -0400
Subject: [PATCH] Allow Docs history to be enabled even when WP_POST_REVISIONS
 is set to false

Define 'BP_DOCS_REVISIONS' constant to override WP_POST_REVISIONS settings for
the bp_doc post type.

Fixes #281
---
 bp-docs.php                |  4 +++-
 includes/addon-history.php |  6 +++---
 includes/caps.php          | 16 +++++++++++-----
 includes/functions.php     | 24 ++++++++++++++++++++++++
 4 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/bp-docs.php b/bp-docs.php
index a9b379e4..ac742425 100644
--- a/bp-docs.php
+++ b/bp-docs.php
@@ -342,7 +342,9 @@ function load_doc_extras() {
 		$this->hierarchy = new BP_Docs_Hierarchy;
 
 		// Don't load the History component if post revisions are disabled
-		if ( defined( 'WP_POST_REVISIONS' ) && WP_POST_REVISIONS ) {
+		$wp_post_revisions = defined( 'WP_POST_REVISIONS' ) && WP_POST_REVISIONS;
+		$bp_docs_revisions = defined( 'BP_DOCS_REVISIONS' ) && BP_DOCS_REVISIONS;
+		if ( $wp_post_revisions || $bp_docs_revisions ) {
 			require_once( BP_DOCS_INCLUDES_PATH . 'addon-history.php' );
 			$this->history = new BP_Docs_History;
 		}
diff --git a/includes/addon-history.php b/includes/addon-history.php
index 6a2f92ac..09c32546 100644
--- a/includes/addon-history.php
+++ b/includes/addon-history.php
@@ -104,7 +104,7 @@ function setup_action() {
 				break;
 
 			// Revisions disabled and we're not looking at an autosave
-			if ( ( ! WP_POST_REVISIONS || !post_type_supports( $post->post_type, 'revisions') ) && !wp_is_post_autosave( $this->revision ) ) {
+			if ( ! wp_revisions_enabled( $post ) && !wp_is_post_autosave( $this->revision ) ) {
 				$redirect = 'edit.php?post_type=' . $post->post_type;
 				break;
 			}
@@ -138,7 +138,7 @@ function setup_action() {
 			else
 				break; // Don't diff two unrelated revisions
 
-			if ( ! WP_POST_REVISIONS || !post_type_supports( $post->post_type, 'revisions' ) ) { // Revisions disabled
+			if ( ! wp_revisions_enabled( $post ) ) { // Revisions disabled
 
 				if (
 					// we're not looking at an autosave
@@ -184,7 +184,7 @@ function setup_action() {
 				break;
 
 			// Revisions disabled and we're not looking at an autosave
-			if ( ( ! WP_POST_REVISIONS || !post_type_supports($post->post_type, 'revisions') ) && !wp_is_post_autosave( $this->revision ) ) {
+			if ( ! wp_revisions_enabled( $post ) && !wp_is_post_autosave( $this->revision ) ) {
 				$redirect = 'edit.php?post_type=' . $post->post_type;
 				break;
 			}
diff --git a/includes/caps.php b/includes/caps.php
index b614cd92..7794f507 100644
--- a/includes/caps.php
+++ b/includes/caps.php
@@ -58,17 +58,23 @@ function bp_docs_map_meta_caps( $caps, $cap, $user_id, $args ) {
 			// Reset all caps. We bake from scratch
 			$caps = array();
 
-			// Admins can do everything
-			if ( user_can( $user_id, 'bp_moderate' ) ) {
-				return array( 'exist' );
-			}
-
 			$doc = bp_docs_get_doc_for_caps( $args );
 
 			if ( empty( $doc ) ) {
 				break;
 			}
 
+			// Special case: view_history requires post revisions
+			// @todo Move this to addon-history
+			if ( 'bp_docs_view_history' === $cap && ! wp_revisions_enabled( $doc ) ) {
+				return array( 'do_not_allow' );
+			}
+
+			// Admins can do everything
+			if ( user_can( $user_id, 'bp_moderate' ) ) {
+				return array( 'exist' );
+			}
+
 			$doc_settings = bp_docs_get_doc_settings( $doc->ID );
 
 			// Caps are stored without the 'bp_docs_' prefix,
diff --git a/includes/functions.php b/includes/functions.php
index 275083a9..0b25fbc0 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -770,3 +770,27 @@ function bp_docs_get_doc_ids_accessible_to_current_user() {
 	$items_sql = $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_type = %s AND ID NOT IN $exclude_sql", bp_docs_get_post_type_name() );
 	return $wpdb->get_col( $items_sql );
 }
+
+/**
+ * Determine how many revisions to retain for Docs.
+ *
+ * @since 1.8
+ *
+ * @return int
+ */
+function bp_docs_revisions_to_keep( $num, $post ) {
+	if ( bp_docs_get_post_type_name() !== $post->post_type ) {
+		return $num;
+	}
+
+	if ( defined( 'BP_DOCS_REVISIONS' ) ) {
+		if ( true === BP_DOCS_REVISIONS ) {
+			$num = -1;
+		} else {
+			$num = intval( BP_DOCS_REVISIONS );
+		}
+	}
+
+	return intval( $num );
+}
+add_filter( 'wp_revisions_to_keep', 'bp_docs_revisions_to_keep', 10, 2 );