add: schedule tags endpoint

fix: memory leak for string args

endpoints/api_v1_schedules_STR.c

@@ -195,7 +195,7 @@ api_v1_schedules_STR_DELETE(struct mg_connection *c, endpoint_args_t *args, stru
 {
     (void)hm;
 
-    char *target_uid_str = args[0].value.v_str;
+    const char *target_uid_str = args[0].value.v_str;
 
     uuid_t target_uid;
     if(schedule_uid_parse(target_uid_str, target_uid))

endpoints/api_v1_schedules_tags_STR.c

@@ -0,0 +1,57 @@
+#include <cJSON.h>
+#include <constants.h>
+#include <endpoints/api_v1_schedules.h>
+#include <logger.h>
+#include <models/junction_tag.h>
+#include <models/schedule.h>
+#include <models/tag.h>
+
+void
+api_v1_schedules_tag_STR_GET(struct mg_connection *c, endpoint_args_t *args, struct http_message *hm)
+{
+    (void)hm;
+
+    int tag_id = tag_get_id(args[0].value.v_str);
+    int *schedules_ids = junction_tag_get_schedules_for_tag_id(tag_id);
+    if(schedules_ids == NULL)
+    {
+        LOG_ERROR("failed to print schedules json\n");
+        mg_send_head(c, 500, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
+        mg_printf(c, "[]");
+        return;
+    }
+
+    cJSON *json = cJSON_CreateArray();
+
+    for(int i = 0; schedules_ids[i] != 0; ++i)
+    {
+        schedule_t* schedule = schedule_get_by_id(schedules_ids[i]);
+
+        if(!schedule)
+        {
+            continue;
+        }
+        cJSON *json_schedule = schedule_to_json(schedule);
+
+        cJSON_AddItemToArray(json, json_schedule);
+
+        schedule_free(schedule);
+    }
+
+    char *json_str = cJSON_Print(json);
+    if (json_str == NULL)
+    {
+        LOG_ERROR("failed to print schedules json\n");
+        mg_send_head(c, 500, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
+        mg_printf(c, "[]");
+    }
+    else
+    {
+        mg_send_head(c, 200, strlen(json_str), "Content-Type: application/json\r\n" STANDARD_HEADERS);
+        mg_printf(c, "%s", json_str);
+        free(json_str);
+    }
+
+    cJSON_Delete(json);
+    free(schedules_ids);
+}