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use super::{ sink_names_input_trigger, source_names_output, BinBuildEnvironment, BinDescription, Calculator, FetchItem, GetCalibration, Item, Iteration, Result, Scope, SinkBin, SinkNames, SourceBin, SourceId, SourceNames, SourceSinkBinDescription, WriteDotSimple, SINK_INPUT, SINK_TRIGGER, SOURCE_OUTPUT, }; use crate::error; use indexmap::IndexSet; static BIN_TYPE: &'static str = "blocker"; pub struct Bin { scope: Scope, source_input: Box<FetchItem>, source_trigger: Box<FetchItem>, result_output: Item, } impl SinkBin for Bin {} impl SourceBin for Bin { fn get_source_data(&self, source: &SourceId) -> Result<Item> { if source.id == SOURCE_OUTPUT { Ok(self.result_output.clone()) } else { error::MissingSourceName { scope: self.scope.clone(), name: source.id.to_string(), bin_type: BIN_TYPE.to_string(), } .fail() } } } impl Calculator for Bin { fn calculate(&mut self, _iteration: &Iteration) -> Result<()> { let input = self.source_input.fetch_item(&self.scope)?; let trigger = self.source_trigger.fetch_item(&self.scope)?; self.result_output = if trigger.counts_as_true() { input } else { Item::Nothing }; Ok(()) } } #[derive(Clone, Debug, Serialize, Deserialize)] pub struct Description; impl BinDescription for Description { type Bin = Bin; fn check_validity( &self, _scope: &Scope, _get_calibration: &mut GetCalibration, ) -> Result<()> { Ok(()) } fn bin_type(&self) -> &'static str { BIN_TYPE } } impl SourceNames for Description { fn source_names(&self) -> Result<IndexSet<String>> { Ok(source_names_output()) } } impl SinkNames for Description { fn sink_names(&self) -> IndexSet<String> { sink_names_input_trigger() } } impl SourceSinkBinDescription for Description { fn build_bin( &self, scope: &Scope, env: &mut BinBuildEnvironment, ) -> Result<Self::Bin> { Ok(Bin { scope: scope.clone(), source_input: env.resolve(SINK_INPUT)?, source_trigger: env.resolve(SINK_TRIGGER)?, result_output: Item::Nothing, }) } } impl WriteDotSimple for Description {}