1 files changed, 46 insertions, 0 deletions
diff --git a/src/componentparameter.rs b/src/componentparameter.rs
new file mode 100644
index 0000000..a2f7b70
--- /dev/null
+++ b/src/componentparameter.rs
@@ -0,0 +1,46 @@
+
+use std::collections::HashMap;
+use serde_json::Value;
+use crate::parameter::{Parameter, ParameterType};
+
+#[derive(Debug, PartialEq)]
+pub enum ComponentParameter {
+	Constant(Parameter),
+	Argument(String)
+}
+
+impl ComponentParameter {
+	pub fn evaluate(&self, arguments: &HashMap<&str, Parameter>) -> Option<Parameter> {
+		match self {
+			Self::Constant(val) => {
+				Some(val.clone())
+			},
+			Self::Argument(argname) => {
+				Some(arguments.get(argname.as_str())?.clone())
+			}
+		}
+	}
+	
+	pub fn from_json(value: &Value) -> Result<Self, &'static str> {
+		let paramvalue = value.get(1).ok_or("index 0 not in component parameter")?;
+		let typename = value.get(0).ok_or("index 0 not in component parameter")?.as_str().ok_or("compparam type not a string")?;
+		if let Some(paramtype) = ParameterType::from_str(typename) {
+			Ok(Self::Constant(Parameter::from_typed_json(paramtype, paramvalue).ok_or("failed to parse parameter constant")?))
+		} else {
+			match typename {
+				"A" | "arg" => {
+					let argname = paramvalue.as_str().ok_or("argument parameter not a string")?.to_string();
+					Ok(Self::Argument(argname))
+				},
+				_ => Err("unknown compparam type")
+			}
+		}
+	}
+	
+	pub fn get_type(&self, arguments: &Vec<(String, ParameterType, Option<Parameter>)>) -> Result<ParameterType, &'static str>{
+		Ok(match self {
+			Self::Constant(param) => param.paramtype(),
+			Self::Argument(argname) => arguments.iter().find(|(n, _t, _d)| n == argname).ok_or("unknown argument name")?.1
+		})
+	}
+}