added db_insert_user

src/db_insert_user.c

@@ -0,0 +1,56 @@
+#include "database.h"
+#include "sql.h"
+#include "user.h"
+
+User *db_insert_user(const char *username, const char *email,
+                     const char *password, const char *group,
+                     bool *is_superuser) {
+  pthread_mutex_lock(&db_mutex);
+  if (!db) {
+    fprintf(stderr, "Databse not initialized\n");
+    return nullptr;
+  }
+  if (!username || !email || !password) {
+    fprintf(stderr, "username, email, password connot be empty\n");
+    return nullptr;
+  }
+  const char *sql = nullptr;
+  sqlite3_stmt *stmt;
+  int rc;
+  if (!group || !is_superuser) {
+    sql = INSERT_USER_USERNAME_EMAIL_PASSWORD_SQL;
+  } else if (!group) {
+    sql = INSERT_USER_USERNAME_EMAIL_PASSWORD_GROUP_SQL;
+  } else {
+    sql = INSERT_USER_FULL_SQL;
+  }
+  rc = sqlite3_prepare_v2(db, sql, -1, &stmt, 0);
+  if (rc != SQLITE_OK) {
+    fprintf(stderr, "Cannot prepare statement: %s\n", sqlite3_errmsg(db));
+    return nullptr;
+  }
+
+  sqlite3_bind_text(stmt, 1, username, -1, SQLITE_STATIC);
+  sqlite3_bind_text(stmt, 2, email, -1, SQLITE_STATIC);
+  sqlite3_bind_text(stmt, 3, password, -1, SQLITE_STATIC);
+
+  if (group) {
+    sqlite3_bind_text(stmt, 4, group, -1, SQLITE_STATIC);
+  }
+  if (is_superuser) {
+    sqlite3_bind_int(stmt, 5, is_superuser);
+  }
+
+  rc = sqlite3_step(stmt);
+  if (rc != SQLITE_DONE) {
+    fprintf(stderr, "Execution failed: %s\n", sqlite3_errmsg(db));
+    sqlite3_finalize(stmt);
+    return nullptr;
+  }
+
+  int inserted_id = sqlite3_last_insert_rowid(db);
+
+  sqlite3_finalize(stmt);
+  printf("User inserted successfully. ID: %d\n", inserted_id);
+  pthread_mutex_unlock(&db_mutex);
+}

src/sql.h

@@ -1,13 +1,13 @@
 #pragma once
 
-#define CREATE_TABLE_USERS               \
-  "create table if not exists users("    \
-  "id integer primary key autoincrement,"    \
-  "username text unique,"                \
-  "email char(50) unique,"               \
-  "password char(150) not null,"         \
-  "user_group char(50) default 'users'," \
-  "is_superuser boolean default false"   \
+#define CREATE_TABLE_USERS                \
+  "create table if not exists users("     \
+  "id integer primary key autoincrement," \
+  "username text unique,"                 \
+  "email char(50) unique,"                \
+  "password char(150) not null,"          \
+  "user_group char(50) default 'users',"  \
+  "is_superuser boolean default false"    \
   ");"
 
 #define INSERT_USER_SQL                                                      \
@@ -16,4 +16,11 @@
 
 #define SELECT_ALL_USERS_SQL "select * from users"
 #define SELECT_USER_BY_USERNAME_SQL "select * from users where username = ?"
-
+#define INSERT_USER_USERNAME_EMAIL_PASSWORD_SQL \
+  "insert into users (username, email, password) values (?, ?, ?)"
+#define INSERT_USER_USERNAME_EMAIL_PASSWORD_GROUP_SQL                        \
+  "insert into users (username, email, password, user_group) values (?, ?, " \
+  "?, ?)"
+#define INSERT_USER_FULL_SQL                                                 \
+  "insert into users (username, email, password, user_group, is_superuser) " \
+  "values (?, ?, ?, ?, ?)"

src/user.h

@@ -13,8 +13,8 @@ typedef struct User {
   bool is_superuser;
 } User;
 
-User *new_user(int id, const char *username, const char *password, const char *email,
-               const char *group, bool is_superuser);
+User *new_user(int id, const char *username, const char *password,
+               const char *email, const char *group, bool is_superuser);
 
 void free_user(User *user);
 
@@ -55,3 +55,6 @@ void verify_token(struct mg_connection *c, struct mg_http_message *hm);
 void db_get_users_from_file(const char *filename);
 char *db_get_all_users();
 User *db_get_user_by_username(const char *username);
+User *db_insert_user(const char *username, const char *email,
+                     const char *password, const char *group,
+                     bool *is_superuser);