azure-functions-codegen 0.1.6

use azure_functions_shared::codegen;
use proc_macro::Diagnostic;
use proc_macro2::TokenStream;
use quote::ToTokens;
use std::borrow::Cow;
use std::convert::TryFrom;
use syn::spanned::Spanned;
use syn::Lit;
use util::{to_camel_case, AttributeArguments, QuotableBorrowedStr, QuotableOption};

pub struct TimerTrigger<'a>(pub Cow<'a, codegen::bindings::TimerTrigger>);

impl TryFrom<AttributeArguments> for TimerTrigger<'_> {
    type Error = Diagnostic;

    fn try_from(args: AttributeArguments) -> Result<Self, Self::Error> {
        let mut name = None;
        let mut schedule = None;
        let mut run_on_startup = None;
        let mut use_monitor = None;

        for (key, value) in args.list.iter() {
            let key_str = key.to_string();

            match key_str.as_str() {
                "name" => match value {
                    Lit::Str(s) => {
                        name = Some(Cow::Owned(to_camel_case(&s.value())));
                    }
                    _ => {
                        return Err(value
                            .span()
                            .unstable()
                            .error("expected a literal string value for the 'name' argument"));
                    }
                },
                "schedule" => match value {
                    Lit::Str(s) => {
                        schedule = Some(Cow::Owned(s.value()));
                    }
                    _ => {
                        return Err(value
                            .span()
                            .unstable()
                            .error("expected a literal string value for the 'schedule' argument"));
                    }
                },
                "run_on_startup" => match value {
                    Lit::Bool(b) => {
                        run_on_startup = Some(b.value);
                    }
                    _ => {
                        return Err(value.span().unstable().error(
                            "expected a literal boolean value for the 'run_on_startup' argument",
                        ));
                    }
                },
                "use_monitor" => match value {
                    Lit::Bool(b) => {
                        use_monitor = Some(b.value);
                    }
                    _ => {
                        return Err(value.span().unstable().error(
                            "expected a literal boolean value for the 'use_monitor' argument",
                        ));
                    }
                },
                _ => {
                    return Err(key.span().unstable().error(format!(
                        "unsupported binding attribute argument '{}'",
                        key_str
                    )));
                }
            };
        }

        Ok(TimerTrigger(Cow::Owned(codegen::bindings::TimerTrigger {
            name: name.expect("expected a name for the TimerTrigger binding"),
            schedule: schedule,
            run_on_startup: run_on_startup,
            use_monitor: use_monitor,
        })))
    }
}

impl ToTokens for TimerTrigger<'_> {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        let name = QuotableBorrowedStr(&self.0.name);
        let schedule = QuotableOption(self.0.schedule.as_ref().map(|x| QuotableBorrowedStr(x)));
        let run_on_startup = QuotableOption(self.0.run_on_startup.clone());
        let use_monitor = QuotableOption(self.0.use_monitor.clone());

        quote!(::azure_functions::codegen::bindings::TimerTrigger {
            name: #name,
            schedule: #schedule,
            run_on_startup: #run_on_startup,
            use_monitor: #use_monitor
        }).to_tokens(tokens)
    }
}