From b8eeb1f44b083ecc25bdaa351540beeab112af07 Mon Sep 17 00:00:00 2001
From: dam <dam@gudinoff>
Date: Tue, 9 Jul 2024 17:38:52 +0100
Subject: Store all user data as CSV files.

---
 unused.jai | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

(limited to 'unused.jai')

diff --git a/unused.jai b/unused.jai
index 1f71b37..da8b41d 100644
--- a/unused.jai
+++ b/unused.jai
@@ -48,6 +48,74 @@ print_database :: (db: Database) {
 
 // --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- //
 
+DB_FILE_SIGN_STR    :: "TTT:B:02";
+
+// Stores data from database into binary file.
+// Returns success.
+store_database :: (db: Database, path: string) -> success: bool #must {
+    assert(xx path, ASSERT_NOT_EMPTY, "path");
+    
+    // Open file.
+    file, open_success := file_open(path, for_writing = true);
+    if open_success == false return false;
+    defer file_close(*file);
+    
+    file_write(*file, DB_FILE_SIGN_STR);
+    file_write(*file, *db, size_of(Database));
+    file_write(*file, db.tasks.data, size_of(Task) * db.tasks.count);
+
+    return true;
+}
+
+// Loads data from binary file into database.
+// Returns success.
+load_database :: (db: *Database, path: string) -> success: bool #must {
+    assert(db != null, ASSERT_NOT_NULL, "db");
+    assert(xx path, ASSERT_NOT_EMPTY, "path");
+    
+    // Open file.
+    file, open_success := file_open(path);
+    if open_success == false then return false;
+    defer file_close(*file);
+    
+    // Validate file signature.
+    file_signature: [DB_FILE_SIGN_STR.count] u8;
+    read_success := file_read(file, *file_signature, DB_FILE_SIGN_STR.count);
+    if read_success == false log_error("Failed to read file signature.");
+    if cast(string)file_signature != DB_FILE_SIGN_STR {
+        log_error("Invalid file signature while loading database.");
+        return false;
+    }
+    
+    // Read database structure.
+    read_success = file_read(file, db, size_of(Database));
+    if read_success == false {
+        log_error("Failed to read database info.");
+        return false;
+    }
+    
+    // Reserve database capacity for tasks.
+    tasks_count := db.tasks.count;
+    Initialize(*db.tasks); // Cleanup whatever was read from file.
+    array_reserve(*db.tasks, tasks_count);
+    
+    // Read database tasks.
+    file_read(file, db.tasks.data, size_of(Task) * tasks_count);
+    db.tasks.count = tasks_count;
+    
+    // Make sure we are reading all the file.
+    buffer: u8;
+    success, bytes := file_read(file, *buffer, 1);
+    if bytes > 0 {
+        log_error("Unexpected content found at the end of file '%'.", path);
+        return false;
+    }
+    
+    return true;
+}
+
+// --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- //
+
 
 // Average cumulative calculation.
 average: float64 = 0;
-- 
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