cvm-rs: merge guac and jpeg libs together into one

doesn't really need to be two seperate libraries. also preperation for other funnies

the build script has been replaced with a much saner justfile which uses much saner "yarn workspace" invocations instead of blindly cding all over the place

cvm-rs/src/guac_js.rs

@@ -0,0 +1,48 @@
+use neon::prelude::*;
+use crate::guac;
+
+fn guac_decode_impl<'a>(cx: &mut FunctionContext<'a>) -> JsResult<'a, JsArray> {
+    let input = cx.argument::<JsString>(0)?.value(cx);
+
+    match guac::decode_instruction(&input) {
+        Ok(data) => {
+            let array = JsArray::new(cx, data.len());
+
+            let conv = data
+                .iter()
+                .map(|v| cx.string(v))
+                .collect::<Vec<Handle<JsString>>>();
+
+            for (i, str) in conv.iter().enumerate() {
+                array.set(cx, i as u32, *str)?;
+            }
+
+            return Ok(array);
+        }
+
+        Err(e) => {
+            let err = cx.string(format!("{}", e));
+            return cx.throw(err);
+        }
+    }
+}
+
+fn guac_encode_impl<'a>(cx: &mut FunctionContext<'a>) -> JsResult<'a, JsString> {
+    let mut elements: Vec<String> = Vec::with_capacity(cx.len());
+
+    // Capture varadic arguments
+    for i in 0..cx.len() {
+        let input = cx.argument::<JsString>(i)?.value(cx);
+        elements.push(input);
+    }
+
+    Ok(cx.string(guac::encode_instruction(&elements)))
+}
+
+pub fn guac_decode(mut cx: FunctionContext) -> JsResult<JsArray> {
+    guac_decode_impl(&mut cx)
+}
+
+pub fn guac_encode(mut cx: FunctionContext) -> JsResult<JsString> {
+    guac_encode_impl(&mut cx)
+}