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#![allow(dead_code)]
use core::convert::TryInto;
use core::marker::PhantomData;
use core::mem;
use core::ptr::null;
#[cfg(feature = "alloc")]
extern crate alloc;
#[cfg(feature = "alloc")]
use alloc::boxed::Box;
use super::characteristic::{self, AttributeMetadata};
use super::{CharacteristicHandles, DescriptorHandle, IncludedServiceHandle, RegisterError, ServiceHandle};
use crate::ble::Uuid;
use crate::{raw, RawError, Softdevice};
pub struct ServiceBuilder<'a> {
handle: u16,
sd: PhantomData<&'a mut Softdevice>,
}
pub struct CharacteristicBuilder<'a> {
handles: CharacteristicHandles,
sb: PhantomData<&'a ServiceBuilder<'a>>,
}
impl<'a> ServiceBuilder<'a> {
pub fn new(_sd: &'a mut Softdevice, uuid: Uuid) -> Result<Self, RegisterError> {
let mut service_handle: u16 = 0;
let ret = unsafe {
raw::sd_ble_gatts_service_add(
raw::BLE_GATTS_SRVC_TYPE_PRIMARY as u8,
uuid.as_raw_ptr(),
&mut service_handle as _,
)
};
RawError::convert(ret)?;
Ok(ServiceBuilder {
handle: service_handle,
sd: PhantomData,
})
}
pub fn add_characteristic<T: AsRef<[u8]>>(
&mut self,
uuid: Uuid,
attr: characteristic::Attribute<T>,
md: characteristic::Metadata,
) -> Result<CharacteristicBuilder<'_>, RegisterError> {
let value = attr.value.as_ref();
let attr_md = attr.metadata.into_raw();
self.add_characteristic_inner(uuid, value, attr.max_len, &attr_md, md)
}
#[cfg(feature = "alloc")]
pub fn add_characteristic_app(
&mut self,
uuid: Uuid,
attr: characteristic::Attribute<Box<[u8]>>,
md: characteristic::Metadata,
) -> Result<CharacteristicBuilder<'_>, RegisterError> {
let value = Box::leak(attr.value);
let attr_md = attr.metadata.into_raw_user();
self.add_characteristic_inner(uuid, value, attr.max_len, &attr_md, md)
}
fn add_characteristic_inner(
&mut self,
uuid: Uuid,
value: &[u8],
max_len: u16,
attr_md: &raw::ble_gatts_attr_md_t,
char_md: characteristic::Metadata,
) -> Result<CharacteristicBuilder<'_>, RegisterError> {
assert!(value.len() <= usize::from(max_len));
assert!(char_md
.user_description
.map_or(true, |x| x.value.len() <= usize::from(x.max_len)));
let (char_props, char_ext_props) = char_md.properties.into_raw();
let user_desc_md = char_md
.user_description
.and_then(|x| x.metadata.map(AttributeMetadata::into_raw));
let cccd_md = char_md.cccd.map(AttributeMetadata::into_raw);
let sccd_md = char_md.sccd.map(AttributeMetadata::into_raw);
let mut char_md = raw::ble_gatts_char_md_t {
char_props,
char_ext_props,
p_char_user_desc: char_md.user_description.map_or(null(), |x| x.value.as_ptr()),
char_user_desc_max_size: char_md.user_description.map_or(0, |x| x.max_len),
char_user_desc_size: char_md.user_description.map_or(0, |x| x.value.len() as u16),
p_char_pf: null(),
p_user_desc_md: user_desc_md.as_ref().map_or(null(), |x| x as _),
p_cccd_md: cccd_md.as_ref().map_or(null(), |x| x as _),
p_sccd_md: sccd_md.as_ref().map_or(null(), |x| x as _),
};
let mut attr = raw::ble_gatts_attr_t {
p_uuid: unsafe { uuid.as_raw_ptr() },
p_attr_md: attr_md as _,
init_len: unwrap!(value.len().try_into()),
init_offs: 0,
max_len,
p_value: value.as_ptr() as *mut _,
};
let mut handles: raw::ble_gatts_char_handles_t = unsafe { mem::zeroed() };
let ret = unsafe {
raw::sd_ble_gatts_characteristic_add(self.handle, &mut char_md as _, &mut attr as _, &mut handles as _)
};
RawError::convert(ret)?;
let handles = CharacteristicHandles {
value_handle: handles.value_handle,
user_desc_handle: handles.user_desc_handle,
cccd_handle: handles.cccd_handle,
sccd_handle: handles.sccd_handle,
};
Ok(CharacteristicBuilder {
handles,
sb: PhantomData,
})
}
pub fn include_service(&mut self, service: &ServiceHandle) -> Result<IncludedServiceHandle, RegisterError> {
let mut handle = 0;
let ret = unsafe { raw::sd_ble_gatts_include_add(self.handle, service.0, &mut handle as _) };
RawError::convert(ret)?;
Ok(IncludedServiceHandle(handle))
}
pub fn build(self) -> ServiceHandle {
ServiceHandle(self.handle)
}
}
impl<'a> CharacteristicBuilder<'a> {
pub fn add_descriptor<T: AsRef<[u8]>>(
&mut self,
uuid: Uuid,
attr: characteristic::Attribute<T>,
) -> Result<DescriptorHandle, RegisterError> {
let value = attr.value.as_ref();
let attr_md = attr.metadata.into_raw();
self.add_descriptor_inner(uuid, value, attr.max_len, &attr_md)
}
#[cfg(feature = "alloc")]
pub fn add_descriptor_app(
&mut self,
uuid: Uuid,
attr: characteristic::Attribute<Box<[u8]>>,
) -> Result<DescriptorHandle, RegisterError> {
let value = Box::leak(attr.value);
let attr_md = attr.metadata.into_raw_user();
self.add_descriptor_inner(uuid, value, attr.max_len, &attr_md)
}
fn add_descriptor_inner(
&mut self,
uuid: Uuid,
value: &[u8],
max_len: u16,
attr_md: &raw::ble_gatts_attr_md_t,
) -> Result<DescriptorHandle, RegisterError> {
let attr = raw::ble_gatts_attr_t {
p_uuid: unsafe { uuid.as_raw_ptr() },
p_attr_md: attr_md as _,
init_len: unwrap!(value.len().try_into()),
init_offs: 0,
max_len,
p_value: value.as_ptr() as *mut _,
};
let mut handle = 0;
let ret = unsafe { raw::sd_ble_gatts_descriptor_add(self.handles.value_handle, &attr as _, &mut handle as _) };
RawError::convert(ret)?;
Ok(DescriptorHandle(handle))
}
pub fn build(self) -> CharacteristicHandles {
self.handles
}
}
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