feat: expand exploreDirectory algorithm

Author: JKRhb

index.html

@@ -790,33 +790,36 @@ Validating an ExposedThingInit
           Set |discovery|.{{ThingDiscoveryProcess/[[filter]]}} to |filter:ThingFilter|.
         li>
         <li>
-          Request the underlying platform to start the directory discovery process.
           <p class="note">
-            This is a placeholder for more details in the discovery algorithm.
-            Implementations should follow the procedures described in the
-            [[WOT-DISCOVERY]] and [WOT-PROTOCOL-BINDINGS] specifications.
-            Some normative steps are indicated below.
+            The following steps of the algorithm are currently Work in Progress.
           p>
-          <ol>
-            <li>
-              If |url| is not a <a>TD Directorya> or if the underlying
-              implementation cannot support the <a>Protocol Bindinga>
-              indicated by |url|, [=reject=] |promise|
-              with {{NotSupportedError}} and terminate these steps.
-            li>
-            <li>
-              If filters in general are not supported by the implementation and
-              |filter| is not `undefined` or `null`, [=reject=] |promise|
-              with {{NotSupportedError}} and stop.
-            li>
-            <li>
-              Run the <a>discovery processa> given |discovery|.
-              <p class="note">
-                From this point on, errors are recorded only on
-                {{ThingDiscoveryProcess/error}}, but don't affect |promise| any longer.
-              p>
-            li>
-          ol>
+
+          If the underlying implementation cannot support the
+          <a>Protocol Bindinga> indicated by |url|, [=reject=] |promise| with
+          {{NotSupportedError}} and stop.
+        li>
+        <li>
+          Request the underlying platform to retrieve the TD available under
+          |discovery|.{{ThingDiscoveryProcess/[[url]]}}.
+          If that does not return a valid TDD Thing Description, [=reject=]
+          |promise| with {{TypeError}} and stop.
+          
+          Otherwise, let |directoryTd| be the retrieved TD.
+        li>
+        <li>
+          Let |consumedTddThing| be the result of
+          <a href="#creating-consumedthing">creating a <dfn>ConsumedThingdfn>a>
+          from |directoryTd|.
+          If that fails, resolve |promise| with {{SyntaxError}} and stop.
+        li>
+        <li>
+          Run the <a>discovery processa> given |discovery| by
+          either invoking one of the actions associated with the Search API
+          – if the {{ThingDiscoveryProcess/[[filter]]}} argument is not
+          `undefined` or `null` – or reading the `things` property.
+        li>
+        <li>
+          
         li>
         <li>
           [=Resolve=] |promise| with |discovery|.