Handle multipart/alternative and application/x-unknown-content-type-scpfile

Strange combination, but the first message with multipart/alternative
also contained a .scp file and not as an attachment.

The template for multipart/alternative allows switching between the
alternatives.

mbox2web

@@ -211,6 +211,26 @@ def render_body(msg):
         }
         bodyhtml = bodytmpl.render(context)
 
+    elif content_type == "multipart/alternative":
+        partshtml = []
+        partstypes = []
+        for part in msg.get_payload():
+            partstypes.append(part.get_content_type())
+            partshtml.append(render_body(part))
+        bodytmpl = jenv.get_template("body_multipart_alternative.html")
+        context = {
+            "types": partstypes,
+            "parts": partshtml,
+        }
+        bodyhtml = bodytmpl.render(context)
+
+    elif content_type == "application/x-unknown-content-type-scpfile":
+        bodytmpl = jenv.get_template("body_application_x-unknown-content-type-scpfile.html")
+        context = {
+            "body": msg.get_payload(decode=True).decode(msg.get_charset() or "iso-8859-1")
+        }
+        bodyhtml = bodytmpl.render(context)
+
     else:
         raise RuntimeError("Content-type " + content_type + " not implemented yet")
 

templates/body_application_x-unknown-content-type-scpfile.html

@@ -0,0 +1,10 @@
+<div class="partouter">
+    <div class="partheader">
+       application/x-unknown-content-type-scpfile
+    </div>
+    <div class="partinner">
+<pre>
+{{body}}
+</pre>
+    </div>
+</div>

templates/body_multipart_alternative.html

@@ -0,0 +1,24 @@
+<div class="partouter">
+    <div class="partheader">
+       multipart/alternative
+    </div>
+    <div class="partinner">
+        {% for type in types %}
+            <input id="sp{{prefix}}_{{loop.index}}" type="radio" name="g{{prefix}}">
+            <label for="sp{{prefix}}_{{loop.index}}">{{type}}</label>
+            <style>
+                #p{{prefix}}_{{loop.index}} {
+                    display: none;
+                }
+                input#sp{{prefix}}_{{loop.index}}:checked ~ #p{{prefix}}_{{loop.index}} {
+                    display: block;
+                }
+            </style>
+        {% endfor %}
+        {% for part in parts %}
+            <div id="p{{prefix}}_{{loop.index}}">
+                {{part}}
+            </div>
+        {% endfor %}
+    </div>
+</div>