Function push_data 

#[unsafe(no_mangle)]
pub extern "C" fn push_data(
    state: *mut AppDbState,
    json_ptr: *const c_char,
) -> *const c_char

Inserts a new record into the database.

This function deserializes the provided JSON string into a LocalDbModel and stores it in the database using the model’s ID as the key.

Parameters

• state - Pointer to the database state instance
• json_ptr - Null-terminated C string containing JSON data

Returns

Returns a JSON-formatted C string containing the operation result. The returned string must be freed by the caller.

Safety

This function is unsafe because it dereferences raw pointers. Both parameters must be valid pointers to their respective types.

Examples

use std::ffi::CString;
use offline_first_core::{create_db, push_data};

let db_name = CString::new("test_db").unwrap();
let db_state = create_db(db_name.as_ptr());

let json = CString::new(r#"{"id":"1","hash":"abc123","data":{"name":"test"}}"#).unwrap();
let result = push_data(db_state, json.as_ptr());

JSON Format

Expected JSON structure:

{
  "id": "unique_identifier",
  "hash": "content_hash", 
  "data": { /* arbitrary JSON data */ }
}