Implement macro format support

.gitignore

@@ -18,3 +18,6 @@ Cargo.lock
 
 #Gnome Builder files
 .buildconfig
+
+# Leo data files
+macros.json

src/commands/cmd_macro.rs

@@ -15,6 +15,7 @@ use std::collections::HashMap;
 use std::string::String;
 use std::fs::{File, OpenOptions};
 use std::io::BufReader;
+use std::vec::Vec;
 
 use crate::traits::Command;
 
@@ -56,7 +57,12 @@ impl Command for CmdMacro {
                     self.help(ctx, msg);
                     return;
                 } else {
-                    response.push(self.get(&id, &op.as_str().to_string()));
+                    let mut macro_msg = self.get(&id, &op.as_str().to_string());
+                    if msg.content.chars().count() > op.end() {
+                        // there's some parameters for the macro
+                        macro_msg = parse_macro(&macro_msg, &msg.content[op.end()+1..]);
+                    }
+                    response.push(&macro_msg);
                 }
                 if let Err(why) = msg.channel_id.say(&ctx.http, &response.build()) {
                     println!("Failed to send macro message {:?}", why);
@@ -210,3 +216,29 @@ impl CmdMacro {
         }
     }
 }
+
+fn parse_macro<'a, 'b>(macro_pre: &'a str, macro_params: &'b str) -> String {
+    if macro_params.chars().count() == 0 {
+        return macro_pre.to_string();
+    }
+    let re = RegexBuilder::new(r#"^\s*([A-Za-z0-9]+|".*"|'.*')"#)
+        .multi_line(true)
+        .dot_matches_new_line(true)
+        .case_insensitive(true)
+        .build()
+        .unwrap();
+    let mut parsed_params = Vec::<String>::new();
+    let mut params_str = macro_params.to_string();
+    // move over macro_params like a tape until out of matches
+    while let Some(re_capture) = re.captures(&params_str) {
+        let re_match = re_capture.get(1).unwrap();
+        parsed_params.push(re_match.as_str().trim_matches('\"').trim_matches('\'').to_string());
+        params_str = params_str[re_match.end()..].to_string();
+    }
+    let mut macro_post = macro_pre.to_string();
+    // replace {#} format in macro with given param
+    for i in 0..parsed_params.len() {
+        macro_post = macro_post.replace(&("{".to_owned()+&i.to_string()+"}"), parsed_params.get(i).unwrap());
+    }
+    return macro_post;
+}