1 files changed, 44 insertions, 0 deletions
diff --git a/src/lua.rs b/src/lua.rs
index 2ab5624..5caf3f1 100644
--- a/src/lua.rs
+++ b/src/lua.rs
@@ -11,7 +11,10 @@ use rlua::Table;
 
 use crate::Context;
 
+use self::template::ArgIndex;
+
 mod serde;
+pub mod template;
 
 pub struct Script<'a> {
     pub lua_module_name: &'a str,
@@ -113,6 +116,47 @@ impl<'a> Script<'a> {
     }
 }
 
+fn module_path(module_name: &str) -> String {
+    format!("modules/{}.lua", module_name)
+}
+
+pub struct ModuleFunction<'a> {
+    pub module_name: &'a str,
+    pub function_name: &'a str,
+}
+
+pub fn call(
+    modfn: &ModuleFunction,
+    args: impl Iterator<Item = (ArgIndex, String)>,
+    ctx: &Context,
+) -> Result<String, ScriptError> {
+    let filename = module_path(modfn.module_name);
+
+    let lua_entr = ctx
+        .branch_head()
+        .unwrap()
+        .tree()
+        .and_then(|tree| tree.get_path(Path::new(&filename)))
+        .map_err(|_| ScriptError::ModuleNotFound)?;
+
+    let lua_blob = ctx.repo.find_blob(lua_entr.id()).unwrap();
+    let lua_code = from_utf8(lua_blob.content()).map_err(|_| ScriptError::ModuleNotUtf8)?;
+
+    lua_context(|ctx| {
+        let module: Table = ctx.load(lua_code).eval()?;
+        let view: Function = module.get(modfn.function_name)?;
+        let lua_args = ctx.create_table()?;
+        for (idx, val) in args {
+            match idx {
+                ArgIndex::Str(s) => lua_args.set(s, val)?,
+                ArgIndex::Num(n) => lua_args.set(n, val)?,
+            }
+        }
+        view.call(lua_args)
+    })
+    .map_err(ScriptError::LuaError)
+}
+
 impl Display for ScriptError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {