src/db.c aktualisiert

src/db.c

@@ -9,5 +9,60 @@
  *
  */
 
-#include "planner.h"
+/************************************************************
+*Create a database and handel it
+*Created by Jan on 13.12.2024.
+*
+************************************************************/
 #include <stdio.h>
+#include <time.h>
+#include "sqlite3.h"
+#include "planner.h"
+
+extern struct llist;
+
+// Initialize a new Database if there no one.
+void init_db(sqlite3 *db) {
+    const char *sql_LinkedList =
+        "CREATE TABLE LinkedList ("
+        "id INTEGER PRIMARY KEY AUTOINCREMENT,"
+        "data TEXT;)";
+
+    // Checks the SQL answer and if it's not ok prints the error code
+    char *errmsg = NULL;
+    if (sqlite3_exec(db, sql_LinkedList, NULL, NULL, &errmsg) != SQLITE_OK) {
+        fprintf(stderr, "Error in creation Table: %s\n", errmsg);
+        sqlite3_free(errmsg);
+    }
+}
+
+// Save a single node of the linkedlist in the database
+// node needs to be replaced with the correct name and pointer
+void save_node_to_db(sqlite3 *db, Node *node) {
+
+    char* errmsg = NULL;
+    sqlite3_stmt *stmt;
+    const char* sql = "INSERT INTO LinkedList (id, data) VALUES (?, ?);";
+    if (sqlite3_prepare_v2(db, sql, -1, &stmt, NULL) != SQLITE_OK) {
+        fprintf(stderr, "Failed to prepare statement: %s\n", sqlite3_errmsg(db));
+    } else {
+        sqlite3_bind_int(stmt, 1, node->id); // ? -> node->id
+        sqlite3_bind_text(stmt, 2, node->data, -1, SQLITE_STATIC); // ? -> node->data
+        if (sqlite3_step(stmt) != SQLITE_DONE) {
+            fprintf(stderr, "Execution failed: %s\n", sqlite3_errmsg(db));
+        } else {
+            printf("Node with ID %d saved.\n", node->id);
+        }
+    }
+    sqlite3_finalize(stmt);
+}
+
+// save a whole linkedlist in the database
+// node needs to be replaced with the correct name and pointer
+void save_linked_list_to_db(sqlite3* db, Node* head) {
+    Node* current = head;
+    while (current != NULL) {
+        save_node_to_db(db, current);
+        current = current->next;
+    }
+}