visionkit-rs 0.2.1

use core::ffi::c_char;
use core::ptr;

use crate::error::VisionKitError;
use crate::ffi;
use crate::private::{error_from_status, parse_area_support_info_ptr};
use crate::support::AreaSupportInfo;

pub struct VNDocumentCameraViewController;

impl VNDocumentCameraViewController {
    pub fn support_info() -> Result<AreaSupportInfo, VisionKitError> {
        let mut support_json: *mut c_char = ptr::null_mut();
        let mut err_msg: *mut c_char = ptr::null_mut();
        let status = unsafe {
            ffi::vn_document_camera_view_controller::vk_vn_document_camera_view_controller_support_json(
                &mut support_json,
                &mut err_msg,
            )
        };
        if status == ffi::status::OK {
            unsafe {
                parse_area_support_info_ptr(
                    support_json,
                    "VNDocumentCameraViewController support info",
                )
            }
        } else {
            Err(unsafe { error_from_status(status, err_msg) })
        }
    }

    pub fn is_available_on_current_platform() -> Result<bool, VisionKitError> {
        Ok(Self::support_info()?.available_on_current_platform)
    }

    pub fn new() -> Result<Self, VisionKitError> {
        let info = Self::support_info()?;
        if info.available_on_current_platform {
            Ok(Self)
        } else {
            Err(info.unavailable_error())
        }
    }
}