ecaps2: Implement serialise.

src/ecaps2.rs

@@ -4,6 +4,7 @@ extern crate blake2;
 
 use disco::{Feature, Identity, Disco};
 use data_forms::DataForm;
+use hashes;
 use hashes::{Hash, parse_hash};
 
 use minidom::Element;
@@ -38,6 +39,17 @@ pub fn parse_ecaps2(root: &Element) -> Result<ECaps2, Error> {
     })
 }
 
+pub fn serialise(ecaps2: &ECaps2) -> Element {
+    let mut c = Element::builder("c")
+                        .ns(ns::ECAPS2)
+                        .build();
+    for hash in ecaps2.hashes.clone() {
+        let hash_elem = hashes::serialise(&hash);
+        c.append_child(hash_elem);
+    }
+    c
+}
+
 fn compute_item(field: &str) -> Vec<u8> {
     let mut bytes = field.as_bytes().to_vec();
     bytes.push(0x1f);