From 3adfbc412a70616460a4fdaaa13924e94cab91e5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=A4rkl?= <info@florianmaerkl.de>
Date: Fri, 3 Jul 2020 21:11:43 +0200
Subject: [PATCH] Finish it

---
 CMakeLists.txt |   3 ++
 heir.c         | 121 ++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 122 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8328c98..6d3d31b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,3 +7,6 @@ add_executable(heir
 	heir.c
 	sway/common/ipc-client.c)
 target_include_directories(heir PRIVATE sway/include)
+
+find_package(json-c REQUIRED)
+target_link_libraries(heir json-c::json-c)
diff --git a/heir.c b/heir.c
index 9644e14..470d9cd 100644
--- a/heir.c
+++ b/heir.c
@@ -1,16 +1,109 @@
 
+#include <ipc-client.h>
+#include <json-c/json.h>
+
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <wordexp.h>
+
+int cmd_argc;
+const char **cmd_argv;
+
+static void run()
+{
+	const char **cmd = calloc((size_t)cmd_argc + 1, sizeof(const char *));
+	for(size_t i=0; i<cmd_argc; i++)
+		cmd[i] = cmd_argv[i];
+	execvp(cmd[0], (char **)cmd + 1);
+	exit(1);
+}
 
 void _sway_abort(const char *format, ...)
 {
-	fprintf(stderr, "fuck\n");
+	// On any error, just run the default
+	run();
 }
 
 void _sway_log(const char *format, ...)
 {
 }
 
+static char *focused_title_json(struct json_object *j)
+{
+	struct json_object *c;
+	if(!json_object_object_get_ex(j, "focused", &c))
+		return NULL;
+	if(json_object_get_boolean(c))
+	{
+		if(json_object_object_get_ex(j, "name", &c))
+		{
+			const char *title = json_object_get_string(c);
+			if(title)
+				return strdup(title);
+		}
+	}
+	if(!json_object_object_get_ex(j, "nodes", &c))
+		return NULL;
+	for(size_t i=0; i<json_object_array_length(c); i++)
+	{
+		struct json_object *cc = json_object_array_get_idx(c, i);
+		if(!cc)
+			continue;
+		char *title = focused_title_json(cc);
+		if(title)
+			return title;
+	}
+	return NULL;
+}
+
+static char *focused_title(const char *json)
+{
+	struct json_object *j = json_tokener_parse(json);
+	if(!j)
+		return NULL;
+	char *r = focused_title_json(j);
+	json_object_put(j);
+	return r;
+}
+
+// parse user@hostname:path and resolve the absolute path
+static char *path_from_title(const char *title)
+{
+	char user[256];
+	if(getlogin_r(user, sizeof(user)) != 0)
+		return NULL;
+	user[sizeof(user) - 1] = '\0';
+	size_t user_len = strlen(user);
+	if(strncmp(title, user, user_len))
+		return NULL;
+	title += user_len;
+	if(*title != '@')
+		return NULL;
+	title++;
+	char hostname[256];
+	if(gethostname(hostname, sizeof(hostname)) != 0)
+		return NULL;
+	hostname[sizeof(hostname) - 1] = '\0';
+	size_t hostname_len = strlen(hostname);
+	if(strncmp(title, hostname, hostname_len))
+		return NULL;
+	title += hostname_len;
+	if(*title != ':')
+		return NULL;
+	title++;
+
+	wordexp_t we;
+	if(wordexp(title, &we, WRDE_NOCMD) != 0)
+		return NULL;
+	char *r = NULL;
+	if(we.we_wordc)
+		r = strdup(we.we_wordv[0]);
+	wordfree(&we);
+	return r;
+}
+
 void usage(const char *name)
 {
 	printf("%s [command]\n", name);
@@ -21,7 +114,31 @@ int main(int argc, const char *argv[])
 {
 	if(argc < 2)
 		usage(argv[0]);
-	printf("apparent\n");
+	cmd_argc = argc - 1;
+	cmd_argv = argv + 1;
+
+	char *sockpath = get_socketpath();
+	if(!sockpath)
+		run();
+	int fd = ipc_open_socket(sockpath);
+	struct timeval timeout = {.tv_sec = 3, .tv_usec = 0};
+	ipc_set_recv_timeout(fd, timeout);
+
+	uint32_t len = 0;
+	char *resp = ipc_single_command(fd, IPC_GET_TREE, "", &len);
+	if(!resp)
+		run();
+	char *title = focused_title(resp);
+	if(!title)
+		run();
+	char *path = path_from_title(title);
+	free(title);
+	if(path)
+	{
+		chdir(path);
+		free(path);
+	}
+	run();
 	return 0;
 }
 
-- 
2.45.2