add basic remote behaviour to client scripts

this commit adds the ability to read the sameAs attribute of portal.json

portal.sameAs is an array of portal dat:// addresses that state that
this portal is the same as those portals, and that we should load their
messages under our name

this makes it possible to effectively post to the same account from
different machines

note: port_1 needs to have port_2 in its sameAs array, and port_2 needs to
have port_1 in its sameAs array, i.e. the relationship needs to be mutual

scripts/feed.js

@@ -138,7 +138,8 @@ function Feed(feed_urls)
       r.home.feed.next();
       return;
     }
-    portal.connect()
+    // if everything went well loading the portal, let's try to load its remotes
+    portal.connect().then(portal.load_remotes)
     r.home.feed.update_log();
   }
 

scripts/portal.js

@@ -62,6 +62,38 @@ function Portal(url)
     setTimeout(r.home.feed.next, r.home.feed.connection_delay);
   }
 
+  this.load_remotes = async function() {
+    if (p.json && p.json.sameAs && p.json.sameAs.length > 0) {
+      // naive solution while testing
+      var remote_promises = p.json.sameAs.map((remote_url) => {
+        return new Promise((resolve, reject) => {
+          console.log("remote url", remote_url)
+          var remote = new Portal(remote_url)
+          remote.start().then(() => {
+            console.log("loaded remote")
+            if (remote.json.sameAs && remote.json.sameAs.indexOf(p.dat) >= 0) {
+              console.log(remote.dat + "has a mutual relationship w/ us :)")
+              // set remote name
+              remote.json.name = `${p.json.name} (${remote.json.name})`
+              // remote.url = p.url
+              r.home.feed.register(remote);
+            } else {
+              console.log(remote.dat + " wasn't a mutual with us :<")
+            }
+          }).then(resolve).catch((err) => {
+            console.error("something went wrong when loading remotes")
+            console.error(err)
+            reject()
+          })
+        })
+      })
+
+      Promise.all(remote_promises).then(() => {
+        console.log("all remotes have been handled?")
+      })
+    }
+  }
+
   this.discover = async function()
   {
     console.log('connecting to: ', p.url);