Return list of dirs and files from OPDS request

src/main.c

@@ -25,6 +25,27 @@ static enum MHD_Result send_response(struct MHD_Connection *connection, int stat
     return ret;
 }
 
+typedef struct {
+    bool is_dir;
+    SV name;
+} Library_Entry;
+
+typedef struct {
+    Library_Entry *elems;
+    size_t count;
+    size_t capacity;
+} Library_Entries;
+
+int compare_library_entries(const void *a, const void *b) {
+    Library_Entry lea = *(Library_Entry*)a;
+    Library_Entry leb = *(Library_Entry*)b;
+
+    if (lea.is_dir && !leb.is_dir) return -1;
+    if (!lea.is_dir && leb.is_dir) return 1;
+
+    return noh_sv_compare(lea.name, leb.name);
+}
+
 static enum MHD_Result handle_opds(struct MHD_Connection *connection, SV url, SV base_path, SV username) {
     Noh_String fs_path = {0};
     noh_string_append_sv(&fs_path, base_path);
@@ -38,21 +59,49 @@ static enum MHD_Result handle_opds(struct MHD_Connection *connection, SV url, SV
 
     DIR *dir = opendir(fs_path.elems);
     if (dir) {
-        noh_log(NOH_INFO, "Exists.");
+        Library_Entries list = {0};
 
         noh_arena_save(&temp);
         struct dirent *entry = noh_arena_alloc(&temp, sizeof(struct dirent));
         while ((entry = readdir(dir)) != NULL) {
-            (void)entry;
-            noh_log(NOH_INFO, "Entry..");
+            SV name = sv(entry->d_name);
+            int type = entry->d_type;
+
+            if (type != DT_DIR && type != DT_REG) continue;
+            if (noh_sv_eq(name, sv(".")) || noh_sv_eq(name, sv(".."))) continue;
+            if (type == DT_REG && !noh_sv_ends_with_ci(name, sv(".epub"))) continue;
+
+            Library_Entry le = {
+                .is_dir = type == DT_DIR,
+                .name = noh_sv_copy_cstr(&temp, entry->d_name),
+            };
+            noh_da_append(&list, le);
         }
+
+        // Sort entries, folders first, then by name.
+        if (list.count > 1)
+            qsort(list.elems, list.count, sizeof(list.elems[0]), compare_library_entries);
+
+        // Print sorted entries.
+        Noh_String response = {0};
+        for (size_t i = 0; i < list.count; i++) {
+            Library_Entry *le = &list.elems[i];
+            noh_string_append_cstr(&response,
+                noh_arena_sprintf(
+                    &temp,
+                     "Entry: %s '"Nsv_Fmt"'.\n", le->is_dir ? "Dir" : "File", Nsv_Arg(le->name)));
+        }
+
+        return send_response(connection, 200, noh_sv_from_string(&response));
+
+        noh_da_free(&list);
         noh_arena_reset(&temp);
 
         closedir(dir);
 
     } else if (errno == ENOENT) {
         closedir(dir);
-        return send_response(connection, 404, sv("That directory does not exist."));
+        return send_response(connection, 404, sv(""));
 
     } else {
         noh_log(NOH_ERROR, "Opening directory failed.");