add commentparser...

ofborg/src/commentparser.rs

@@ -0,0 +1,95 @@
+
+pub fn parse(text: &str) -> Option<Instruction> {
+    let tokens: Vec<String> = text.split_whitespace()
+        .map(|s| s.to_owned()).collect();
+
+    if tokens.len() < 2 {
+        return None;
+    }
+
+    let (targeter_, params_) = tokens.split_at(2);
+    let targeter: Vec<String> = targeter_.iter()
+        .map(|s| s.to_lowercase()).collect();
+    let params: Vec<String> = params_.to_vec();
+
+    if targeter == ["@grahamcofborg", "build"] {
+        return Some(Instruction::Build(params));
+    }
+
+    return None;
+}
+
+#[derive(PartialEq, Debug)]
+pub enum Instruction {
+    Build(Vec<String>)
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    #[test]
+    fn parse_empty() {
+        assert_eq!(None, parse(""));
+    }
+
+
+    #[test]
+    fn bogus_comment() {
+        assert_eq!(None, parse(":) :) :)"));
+    }
+
+    #[test]
+    fn build_comment() {
+        assert_eq!(Some(Instruction::Build(vec![
+            String::from("foo"),
+            String::from("bar"),
+            String::from("baz")
+        ])),
+                   parse("@GrahamCOfBorg build foo bar baz"));
+    }
+
+    #[test]
+    fn build_comment_lower() {
+        assert_eq!(Some(Instruction::Build(vec![
+            String::from("foo"),
+            String::from("bar"),
+            String::from("baz")
+        ])),
+                   parse("@grahamcofborg build foo bar baz"));
+    }
+
+
+    #[test]
+    fn build_whitespace_disregarded() {
+        assert_eq!(Some(Instruction::Build(vec![
+            String::from("foo"),
+            String::from("bar"),
+            String::from("baz")
+        ])),
+                   parse("
+
+
+  @grahamcofborg
+   build foo
+
+
+        bar baz
+
+"));
+    }
+
+
+
+    #[test]
+    fn build_comment_lower_package_case_retained() {
+        assert_eq!(Some(Instruction::Build(vec![
+            String::from("foo"),
+            String::from("bar"),
+            String::from("baz.Baz")
+        ])),
+                   parse("@grahamcofborg build foo bar baz.Baz"));
+    }
+
+}