add ability to query page content from repo and display it in the popup

3 files changed, 106 insertions, 0 deletions

diff --git a/content/activity_info_server.js b/content/activity_info_server.js
index 8435377..a1384e9 100644
--- a/content/activity_info_server.js
+++ b/content/activity_info_server.js
@@ -11,6 +11,8 @@
  * IMPORTS_START
  * IMPORT listen_for_connection
  * IMPORT CONNECTION_TYPE
+ * IMPORT set_repo_query_repos
+ * IMPORT set_repo_query_callback
  * IMPORTS_END
  */
 
@@ -33,9 +35,22 @@ function report_script(script_data)
 
 function report_settings(settings)
 {
+    const [pattern, settings_data, repos] = settings;
+    set_repo_query_repos(repos);
+
     report_activity("settings", settings);
 }
 
+function report_repo_query_result(result)
+{
+    report_activity("repo_query_result", result);
+}
+
+function trigger_repo_query()
+{
+    set_repo_query_callback(report_repo_query_result);
+}
+
 function new_connection(port)
 {
     console.log("new activity info connection!");
@@ -44,6 +59,14 @@ function new_connection(port)
 
     for (const activity of activities)
 	port.postMessage(activity);
+
+    /*
+     * So far the only thing we expect to receive is repo query order. Once more
+     * possibilities arrive, we will need to complicate this listener.
+     */
+    port.onMessage.addListener(trigger_repo_query);
+
+    port.onDisconnect.addListener(() => ports.delete(port));
 }
 
 function start_activity_info_server()
diff --git a/content/main.js b/content/main.js
index 8f8375e..437a32b 100644
--- a/content/main.js
+++ b/content/main.js
@@ -20,6 +20,7 @@
  * IMPORT is_chrome
  * IMPORT is_mozilla
  * IMPORT start_activity_info_server
+ * IMPORT set_repo_query_url
  * IMPORTS_END
  */
 
@@ -129,4 +130,6 @@ if (!is_privileged_url(document.URL)) {
     }
 
     start_activity_info_server();
+
+    set_repo_query_url(document.URL);
 }
diff --git a/content/repo_query.js b/content/repo_query.js
new file mode 100644
index 0000000..b8c8ed9
--- /dev/null
+++ b/content/repo_query.js
@@ -0,0 +1,80 @@
+/**
+ * part of Hachette
+ * Getting available content for site from remote repositories.
+ *
+ * Copyright (C) 2021 Wojtek Kosior
+ * Redistribution terms are gathered in the `copyright' file.
+ */
+
+/*
+ * IMPORTS_START
+ * IMPORT make_ajax_request
+ * IMPORTS_END
+ */
+
+var query_started = false;
+
+var url = undefined;
+var repos = undefined;
+var callback = undefined;
+
+async function query(repo)
+{
+    const [repo_url, data] = repo;
+
+    let response = "Query failed";
+    const query_url = `${repo_url}/query?n=${encodeURIComponent(url)}`;
+
+    try {
+	let xhttp = await make_ajax_request("GET", query_url);
+	if (xhttp.status === 200)
+	    response = xhttp.responseText;
+	console.log(xhttp);
+    } catch (e) {
+	console.log(e);
+    }
+
+    callback([repo_url, response]);
+}
+
+function start_query()
+{
+    if (query_started || !url || !repos || !callback)
+	return;
+
+    query_started = true;
+
+    console.log(`about to query ${url} from ${repos}`);
+
+    for (const repo of repos)
+	query(repo);
+}
+
+function set_repo_query_url(_url)
+{
+    url = _url;
+
+    start_query();
+}
+
+function set_repo_query_repos(_repos)
+{
+    repos = _repos;
+
+    start_query();
+}
+
+function set_repo_query_callback(_callback)
+{
+    callback = _callback;
+
+    start_query();
+}
+
+/*
+ * EXPORTS_START
+ * EXPORT set_repo_query_url
+ * EXPORT set_repo_query_repos
+ * EXPORT set_repo_query_callback
+ * EXPORTS_END
+ */