From 07a883feeeea63cc23fb5100a0618f29b0a5da9f Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <koszko@koszko.org>
Date: Sat, 15 Jan 2022 12:35:47 +0100
Subject: make blocking rules queryable in pattern tree just as mappings are

---
 background/patterns_query_manager.js | 56 +++++++++++++++++++++++++-----------
 1 file changed, 39 insertions(+), 17 deletions(-)

(limited to 'background')

diff --git a/background/patterns_query_manager.js b/background/patterns_query_manager.js
index e657448..8b563ef 100644
--- a/background/patterns_query_manager.js
+++ b/background/patterns_query_manager.js
@@ -4,7 +4,7 @@
  * Function: Instantiate the Pattern Tree data structure, filled with mappings
  *           from IndexedDB.
  *
- * Copyright (C) 2021 Wojtek Kosior
+ * Copyright (C) 2021,2022 Wojtek Kosior
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -54,7 +54,7 @@ let secret;
 const tree = pqt.make();
 #EXPORT tree
 
-const current_mappings = new Map();
+const currently_registered = new Map();
 
 #IF MOZILLA || MV3
 let registered_script = null;
@@ -92,28 +92,46 @@ if (this.haketilo_content_script_main)
 
     script_update_occuring = false;
 }
+#ENDIF
 
-function register_mapping(mapping)
+function register(kind, object)
 {
-    for (const [pattern, resource] of Object.entries(mapping.payloads))
-	pqt.register(tree, pattern, mapping.identifier, resource);
-    current_mappings.set(mapping.identifier, mapping);
-}
+    if (kind === "mappings") {
+	for (const [pattern, resource] of Object.entries(object.payloads))
+	    pqt.register(tree, pattern, object.identifier, resource);
+    } else /* if (kind === "blocking") */ {
+	/*
+	 * All simple block/allow rules use "~allow" in place of mapping id.
+	 * This way it won't collide with any real mapping id and will always
+	 * be sorted as higher value than mapping ids.
+	 */
+	pqt.register(tree, object.pattern, "~allow", object.allow + 0);
+    }
+
+#IF MOZILLA || MV3
+    const id = kind === "mappings" ? object.identifier : object.pattern;
+    currently_registered.set(id, object);
 #ENDIF
+}
 
-function mapping_changed(change)
+function changed(kind, change)
 {
-    console.log('mapping changes!', arguments);
-    const old_version = current_mappings.get(change.key);
+    const old_version = currently_registered.get(change.key);
     if (old_version !== undefined) {
-	for (const pattern in old_version.payloads)
-	    pqt.deregister(tree, pattern, change.key);
+	if (kind === "mappings") {
+	    for (const pattern in old_version.payloads)
+		pqt.deregister(tree, pattern, change.key);
+	} else /* if (kind === "blocking") */ {
+	    pqt.deregister(tree, change.key, "~allow");
+	}
 
-	current_mappings.delete(change.key);
+#IF MOZILLA || MV3
+	currently_registered.delete(change.key);
+#ENDIF
     }
 
     if (change.new_val !== undefined)
-	register_mapping(change.new_val);
+	register(kind, change.new_val);
 
 #IF MOZILLA || MV3
     script_update_needed = true;
@@ -125,10 +143,14 @@ async function start(secret_)
 {
     secret = secret_;
 
-    const [tracking, initial_mappings] =
-	  await haketilodb.track.mappings(mapping_changed);
+    const [mapping_tracking, initial_mappings] =
+	  await haketilodb.track.mappings(ch => changed("mappings", ch));
+    const [blocking_tracking, initial_blocking] =
+	  await haketilodb.track.blocking(ch => changed("blocking", ch));
+
+    initial_mappings.forEach(m => register("mappings", m));
+    initial_blocking.forEach(b => register("blocking", b));
 
-    initial_mappings.forEach(register_mapping);
 #IF MOZILLA || MV3
     script_update_needed = true;
     await update_content_script();
-- 
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