From 5b7ee56afc7b1e1d4cd05235caa7e81dad540e6f Mon Sep 17 00:00:00 2001
From: igor <igor@kolokolnikov.dev>
Date: Thu, 12 Feb 2026 00:13:47 -0800
Subject: [PATCH] State is now being saved between sessions. Needs cleanup.

---
 main.c | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index c07405f..be0ae41 100644
--- a/main.c
+++ b/main.c
@@ -149,7 +149,7 @@ Color activity_type_color_representation[activity_type_COUNT] = {
 // TODO: String representation.
 
 typedef struct Activity {
-    enum activity_type activity; // TODO: Rename to kind or type.
+    activity_type activity; // TODO: Rename to kind or type.
     Color color;
     U64 began;
     U64 ended;
@@ -220,7 +220,7 @@ int main(int argc, char *argv[])
     // WARNING: Not bullet proof, yet.
     FILE *f;
     if(path_exists(file_buffer)) {
-        f = fopen(file_buffer, "r+");
+        f = fopen(file_buffer, "r");
         if(!f) {
             fprintf(stderr, "fopen(%s) failed: %s\n", file_buffer, strerror(errno));
             return 1;
@@ -278,6 +278,8 @@ int main(int argc, char *argv[])
 
     /* return 0; */
 
+    U64 last_save = 0;
+
     U64 lower_bound_s = (U64)ts;
     U64 upper_bound_s = lower_bound_s + 86400;
     // U64 upper_bound_s = lower_bound_s + 3600;
@@ -425,11 +427,35 @@ int main(int argc, char *argv[])
         for(U32 i = 0; i <= current_activity; i++) {
             activities_stats[activities[i].activity].total_seconds = 0;
         }
-    }
 
-    CloseWindow();
+        // Save the state every 5 seconds.
+        if((now_s - last_save) >= 5) {
+            f = freopen(file_buffer, "w", f); // WARNING: TODO: Might fail.
+
+            char write_buffer[128];
+            for(U32 i = 0; i <= current_activity; i++) {
+                snprintf(write_buffer, sizeof(write_buffer),
+                    "%s %llu %llu\n",
+                    activity_type_string_representation[activities[i].activity],
+                    activities[i].began,
+                    activities[i].ended);
+
+                size_t write_buffer_len = strlen(write_buffer);
+                if(fwrite(write_buffer, 1, write_buffer_len, f) != write_buffer_len) {
+                    perror("fwrite");
+                }
+            }
+
+            if (fflush(f) != 0)
+                perror("fflush");
+
+            last_save = now_s;
+        }
+    }
 
     fclose(f);
 
+    CloseWindow();
+
     return 0;
 }