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use crate::error::Result;
use crate::Backend;
use crate::BuildableValue;
use crate::BuildableCollection;
use crate::CollectionBuilder;
use crate::ValueBuilder;
#[derive(Copy, Clone)]
pub struct DialoguerBackend;
impl Backend for DialoguerBackend {
fn bool_builder(&self) -> Box<dyn ValueBuilder<Output = bool>> {
Box::new(DialoguerValueBuilder::<bool>(std::marker::PhantomData))
}
fn u8_builder(&self) -> Box<dyn ValueBuilder<Output = u8>> {
Box::new(DialoguerValueBuilder::<u8>(std::marker::PhantomData))
}
fn u16_builder(&self) -> Box<dyn ValueBuilder<Output = u16>> {
Box::new(DialoguerValueBuilder::<u16>(std::marker::PhantomData))
}
fn u32_builder(&self) -> Box<dyn ValueBuilder<Output = u32>> {
Box::new(DialoguerValueBuilder::<u32>(std::marker::PhantomData))
}
fn u64_builder(&self) -> Box<dyn ValueBuilder<Output = u64>> {
Box::new(DialoguerValueBuilder::<u64>(std::marker::PhantomData))
}
fn u128_builder(&self) -> Box<dyn ValueBuilder<Output = u128>> {
Box::new(DialoguerValueBuilder::<u128>(std::marker::PhantomData))
}
fn i8_builder(&self) -> Box<dyn ValueBuilder<Output = i8>> {
Box::new(DialoguerValueBuilder::<i8>(std::marker::PhantomData))
}
fn i16_builder(&self) -> Box<dyn ValueBuilder<Output = i16>> {
Box::new(DialoguerValueBuilder::<i16>(std::marker::PhantomData))
}
fn i32_builder(&self) -> Box<dyn ValueBuilder<Output = i32>> {
Box::new(DialoguerValueBuilder::<i32>(std::marker::PhantomData))
}
fn i64_builder(&self) -> Box<dyn ValueBuilder<Output = i64>> {
Box::new(DialoguerValueBuilder::<i64>(std::marker::PhantomData))
}
fn i128_builder(&self) -> Box<dyn ValueBuilder<Output = i128>> {
Box::new(DialoguerValueBuilder::<i128>(std::marker::PhantomData))
}
fn usize_builder(&self) -> Box<dyn ValueBuilder<Output = usize>> {
Box::new(DialoguerValueBuilder::<usize>(std::marker::PhantomData))
}
fn isize_builder(&self) -> Box<dyn ValueBuilder<Output = isize>> {
Box::new(DialoguerValueBuilder::<isize>(std::marker::PhantomData))
}
fn f32_builder(&self) -> Box<dyn ValueBuilder<Output = f32>> {
Box::new(DialoguerValueBuilder::<f32>(std::marker::PhantomData))
}
fn f64_builder(&self) -> Box<dyn ValueBuilder<Output = f64>> {
Box::new(DialoguerValueBuilder::<f64>(std::marker::PhantomData))
}
fn char_builder(&self) -> Box<dyn ValueBuilder<Output = char>> {
Box::new(DialoguerValueBuilder::<char>(std::marker::PhantomData))
}
fn string_builder(&self) -> Box<dyn ValueBuilder<Output = String>> {
Box::new(DialoguerValueBuilder::<String>(std::marker::PhantomData))
}
fn vec_builder<T>(&self) -> Box<dyn CollectionBuilder<Output = Vec<T>>>
where T: 'static + BuildableValue
{
Box::new(DialoguerVecBuilder::<T>(std::marker::PhantomData))
}
fn option_builder<T: 'static + BuildableValue>(&self) -> Box<dyn CollectionBuilder<Output = Option<T>>> {
Box::new(DialoguerOptionValueBuilder::<T>(std::marker::PhantomData))
}
fn struct_builder<T>(&self) -> Box<dyn CollectionBuilder<Output = T>>
where T: 'static + BuildableCollection
{
Box::new(DialoguerStructBuilder::<T>(std::marker::PhantomData))
}
}
pub struct DialoguerValueBuilder<T: Sized>(std::marker::PhantomData<T>);
impl<T> ValueBuilder for DialoguerValueBuilder<T>
where T: std::str::FromStr + Clone + std::fmt::Display,
T::Err: std::fmt::Display + std::fmt::Debug,
{
type Output = T;
fn build_value(&self, question: &str, default: Option<&Self::Output>) -> Result<Self::Output> {
let mut dia = dialoguer::Input::<T>::new();
dia.with_prompt(question);
if let Some(def) = default {
dia.with_initial_text(def.to_string());
}
dia.interact_text().map_err(crate::error::IOBError::from)
}
}
pub struct DialoguerOptionValueBuilder<T: BuildableValue>(std::marker::PhantomData<T>);
impl<T: BuildableValue> CollectionBuilder for DialoguerOptionValueBuilder<T> {
type Output = Option<T>;
fn build_collection(&self, value_desc: &str) -> Result<Self::Output> {
let q = format!("Do you want to provide a Value for {}", value_desc);
let b = dialoguer::Input::<bool>::new()
.with_prompt(q)
.interact_text()?;
if b {
T::builder(DialoguerBackend)
.build_value(value_desc, None)
.map(Some)
} else {
Ok(None)
}
}
}
pub struct DialoguerVecBuilder<T: 'static + BuildableValue>(std::marker::PhantomData<T>);
impl<T> CollectionBuilder for DialoguerVecBuilder<T>
where T: 'static + BuildableValue
{
type Output = Vec<T>;
fn build_collection(&self, value_desc: &str) -> Result<Self::Output> {
let mut buf = vec![];
loop {
let v: T = T::builder(DialoguerBackend).build_value(value_desc, None)?;
buf.push(v);
if !dialoguer::Input::<bool>::new().with_prompt("Another one?").interact_text()? {
break
}
}
Ok(buf)
}
}
pub struct DialoguerStructBuilder<T: 'static + BuildableCollection>(std::marker::PhantomData<T>);
impl<T> CollectionBuilder for DialoguerStructBuilder<T>
where T: 'static + BuildableCollection
{
type Output = T;
fn build_collection(&self, value_desc: &str) -> Result<Self::Output> {
T::builder(DialoguerBackend).build_collection(value_desc)
}
}
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