Identifiers work!

1 files changed, 89 insertions, 43 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 7790b9a..a2bfc37 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -38,14 +38,14 @@ struct View {
 }
 
 impl View {
-    fn process(&self, input: &Value) -> Result<Value, ParseError> {
-        let mut out_vars = HashMap::new();
+    fn process(&self, input: &impl MappedStructure) -> Result<Context, ParseError> {
+        let mut out_vars = Context::new();
         for output in &self.outputs {
             let mut buf = String::new();
             exec( input, &output.code, &mut buf )?;
             out_vars.insert( output.name.clone(), Value::String(buf) );
         }
-        Ok(Value::Dictionary(out_vars))
+        Ok(out_vars)
     }
 }
 
@@ -59,17 +59,60 @@ type Properties = HashMap<String, String>;
 
 #[derive(Debug)]
 enum Token {
-    Show(String,Properties),
+    Show(Identifier,Properties),
     Text(String),
 }
 
-#[derive(Debug)]
+#[derive(Debug,Clone)]
 pub enum Value {
     Dictionary(HashMap<String,Value>),
     List(Vec<Value>),
     String(String),
     Int(i64),
     Float(f64),
+    Identifier(Identifier),
+}
+
+#[derive(Debug,Clone)]
+pub enum IdentifierValue {
+    Name(String),
+    Index(usize),
+}
+
+pub type Identifier = Vec<IdentifierValue>;
+pub type Context = HashMap<String,Value>;
+
+pub trait MappedStructure {
+    fn get_value(&self, id: &Identifier) -> Option<Value>;
+}
+
+impl MappedStructure for Context {
+    fn get_value(&self, id: &Identifier) -> Option<Value> {
+        if id.len() == 0 {
+            return None;
+        }
+        let mut cur_val : Option<&Value> = if let IdentifierValue::Name(s) = &id[0] {
+            self.get(s)
+        } else {
+            return None;
+        };
+        if cur_val.is_none() {
+            return None;
+        }
+
+        for idx in 1..id.len() {
+            if let IdentifierValue::Name(s) = &id[idx] &&
+                let Some(Value::Dictionary(d)) = &cur_val {
+                cur_val.replace( if let Some(v) = d.get(s) {
+                    v
+                } else {
+                    return None;
+                });
+            }
+        }
+
+        return cur_val.cloned();
+    }
 }
 
 impl Crimtag {
@@ -157,7 +200,7 @@ impl Crimtag {
         }
     }
 
-    pub fn render_partial(&self, view: &str, input: &Value ) -> Result<Value,ParseError> {
+    pub fn render_partial(&self, view: &str, input: &impl MappedStructure ) -> Result<Context,ParseError> {
         if let Some(view) = self.views.get(view) {
             return view.process( input )
         } else {
@@ -165,14 +208,13 @@ impl Crimtag {
         }
     }
 
-    pub fn render(&self, view: &str, input: &Value ) -> Result<String,ParseError> {
+    pub fn render(&self, view: &str, input: &impl MappedStructure ) -> Result<String,ParseError> {
         if let Some(view) = self.views.get( view ) {
-            let output = view.process( input )?;
+            let mut output = view.process( input )?;
             if let Some(l) = &view.layout {
                 self.render( l, &output )
             } else {
-                if let Value::Dictionary(mut d) = output &&
-                    let Some(content) = d.remove("content") &&
+                if let Some(content) = output.remove("content") &&
                     let Value::String(s) = content {
 
                     Ok(s)
@@ -187,38 +229,40 @@ impl Crimtag {
     }
 }
 
-fn exec(input: &Value, tokens: &Vec<Token>, buf: &mut String) -> Result<(),ParseError> {
+fn exec(input: &impl MappedStructure, tokens: &Vec<Token>, buf: &mut String) -> Result<(),ParseError> {
     for token in tokens {
         match token {
-            Token::Show(s,p) => {
+            Token::Show(ident,p) => {
                 let format = if let Some(s) = p.get("format") {
                     s
                 } else {
                     &"".to_string()
                 };
-                if let Value::Dictionary(d) = input &&
-                    let Some(value) = d.get(s) {
-                        match value {
-                            Value::Dictionary(_) => {
-                                buf.push_str("<dictionary>");
-                            }
-                            Value::List(_) => {
-                                buf.push_str("<list>");
-                            }
-                            Value::String(s) => {
-                                buf.push_str(s);
-                            }
-                            Value::Int(i) => {
-                                buf.push_str(&i.to_string());
-                            }
-                            Value::Float(f) => {
-                                if format == "" {
-                                    buf.push_str(&f.to_string());
-                                } else {
-                                    buf.push_str(&f.to_string());
-                                }
+                if let Some(value) = input.get_value( &ident ) {
+                    match value {
+                        Value::Dictionary(_) => {
+                            buf.push_str("<dictionary>");
+                        }
+                        Value::List(_) => {
+                            buf.push_str("<list>");
+                        }
+                        Value::String(s) => {
+                            buf.push_str(s.as_str());
+                        }
+                        Value::Int(i) => {
+                            buf.push_str(&i.to_string());
+                        }
+                        Value::Float(f) => {
+                            if format == "" {
+                                buf.push_str(&f.to_string());
+                            } else {
+                                buf.push_str(&f.to_string());
                             }
                         }
+                        Value::Identifier(_) => {
+                            // ???
+                        }
+                    }
                 }
             }
             Token::Text(s) => {
@@ -254,14 +298,14 @@ mod tests {
         let mut ct = Crimtag::new();
         if let Err(e) = ct.load_static(r#"Here is a sample
 [|view "index" theme="standard"|><html><body>Hi</body></html><|view|]
-That was fun! now a placeholder: [|view "placeholder"|] and now one with an implicit [|view "simple"|>Body [|show "content"|] and end<|view|] aoeu
+That was fun! now a placeholder: [|view "placeholder"|] and now one with an implicit [|view "simple"|>Body -> [|show content|] <- and end<|view|] aoeu
 
-[|view "index" layout="simple"|>Whatever man!<|view|]
+[|view "person" layout="simple"|>Welcome [|show person.last_name|], [|show person.first_name|]! It's lovely to see you again.<|view|]
 
 Now with explicit outputs:
 [|view "complex"|>
     [|output "content"|>
-       Here's a [|show "name"|].
+       Here's a [|show name|].
     <|output|]
     [|output "sidebar"|>
         What's up world?
@@ -274,13 +318,15 @@ Now with explicit outputs:
         } else {
             println!("It finished");
             if let Ok(v) = ct.render(
-                "index",
-                &Value::Dictionary(
-                    HashMap::from([
-                        ("hi".to_string(),Value::String("hi".to_string()))
-                        ])
-                    )
-                ) {
+                "person",
+                &Context::from([
+                    ("hi".to_string(),Value::String("hi".to_string())),
+                    ("person".to_string(),Value::Dictionary(HashMap::from([
+                        ("first_name".to_string(), Value::String("Bob".to_string())),
+                        ("last_name".to_string(), Value::String("Smith".to_string())),
+                    ]))),
+                    ])
+            ) {
                 println!("View result: {:?}", v );
             } else {
                 println!("Error?");