feat: magnet hash key, ziahamza/webui-aria2#468

Author: soulteary

src/js/ctrls/modal.js

@@ -106,6 +106,20 @@ export default angular
             .filter(function(d) {
               return d.length;
             })
+            .map(function(u) {
+              /// transform bt-key into legal magnet link
+              /// support BASE32 encoding key string or HEX encoding key string
+              var str = _.toUpper(u[0]);
+              var hashkey = _.head(_.split(str, "&")); //maybe url contains additional attribute  such as dn/tr
+              const base32Regex = /^[2-7 | A-Z]{32}$/;
+              const hexRegex = /^[0-9 | A-Z]{40}$/;
+              if (base32Regex.test(hashkey) || hexRegex.test(hashkey)) {
+                u[0] = "magnet:?xt=urn:btih:" + u[0];
+                // if hashkey is legal bt-hashkey string then add protocol's head
+                // only support 32-bit length HEX encoding string or 40-bit length BASE32 length encoding string
+              }
+              return u;
+            })
             .value();
         }
       };