From 3a87028b34c969744f6c63ba73947cfa32156e7d Mon Sep 17 00:00:00 2001
From: pdp8 <pdp8@pdp8.info>
Date: Sat, 9 Sep 2023 16:02:50 +0200
Subject: update and clean-inbox added, no outbox send for delete, recursive
 create for objects with activities (lemmy)

---
 server.rb | 71 +++++++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 51 insertions(+), 20 deletions(-)

(limited to 'server.rb')

diff --git a/server.rb b/server.rb
index 7319efa..68c51e1 100644
--- a/server.rb
+++ b/server.rb
@@ -2,24 +2,16 @@
 post '/inbox' do
   request.body.rewind # in case someone already read it
   @body = request.body.read
-  halt 400 if @body.empty?
   begin
     @activity = JSON.parse @body
-  rescue StandardError
+  rescue StandardError => e
     p @body
     halt 400
   end
   # deleted actors return 403 => verification error
   halt 200 if @activity['type'] == 'Delete' and @activity['actor'] == @activity['object']
   # verify! # pixelfed sends unsigned activities???
-  type = @activity['type'].downcase.to_sym
-  save_activity(@activity, INBOX) # unless %i[create announce].include? type
-  if %i[create announce follow accept undo delete like update move].include? type
-    send(type)
-  else
-    p "Unknown activity #{type}:"
-    jj @activity
-  end
+  handle_activity
   200
 end
 
@@ -66,12 +58,7 @@ helpers do
   def create
     @count ||= 0
     @object ||= @activity['object']
-
-    @object = if @object['type'] == 'Like' # lemmy likes
-                save_object @object['object'], INBOX
-              else
-                save_object @object, INBOX
-              end
+    save_inbox_object
     return unless @object and @object['inReplyTo'] and @count < 5
 
     # recursive thread download
@@ -81,11 +68,14 @@ helpers do
   end
 
   def announce
+    @object ||= @activity['object']
+    @object = fetch(@object) if @object.is_a? String and @object.match(/^http/)
+    @object['announce'] = @activity['actor'] if @object
     create
   end
 
   def like
-    create
+    announce
   end
 
   def follow
@@ -94,8 +84,13 @@ helpers do
   end
 
   def accept
-    halt 501 unless @activity['object']['type'] == 'Follow'
-    update_collection FOLLOWING, @activity['object']['object']
+    if @activity['object']['type'] == 'Follow'
+      update_collection FOLLOWING, @activity['object']['object']
+    else
+      p "Cannot accept @activity['object']['type']"
+      jj @activity
+      halt 501
+    end
   end
 
   def undo
@@ -106,12 +101,15 @@ helpers do
       file = find_file @activity['object']['object']
       FileUtils.rm(file) if file
     else
+      p "Cannot undo @activity['object']['type']"
+      jj @activity
       halt 501
     end
   end
 
   def update
-    FileUtils.rm(find_file(@activity['object']['id']))
+    file = find_file(@activity['object']['id'])
+    FileUtils.rm(file) if file
     create
   end
 
@@ -124,6 +122,39 @@ helpers do
     outbox 'Follow', @activity['target'], [@activity['target']] if @activity['actor'] == @activity['object']
   end
 
+  def handle_activity
+    type = @activity['type'].downcase.to_sym
+    save_item @activity, File.join(INBOX[:dir], @activity['type'].downcase, activity_name)
+    if ACTIVITIES.include? type
+      send(type)
+    else
+      p "Unknown activity #{type}:"
+      jj @activity
+    end
+  end
+
+  def activity_name
+    @activity['published'] ? "#{@activity['published']}_#{mention(@activity['actor'])}.json" : "_#{Time.now.utc.iso8601}_#{mention(@activity['actor'])}.json"
+  end
+
+  def save_inbox_object
+    @object = fetch(@object) if @object.is_a? String and @object.match(/^http/)
+    if @object['type'] and ACTIVITIES.include? @object['type'].downcase.to_sym
+      @activity = @object
+      handle_activity
+      return
+    end
+    # @object = @object['object'] if @object['type'] == 'Like' # lemmy likes
+    return unless @object and @object['type'] != 'Person'
+
+    if @activity['type'] != 'Update' && (@object['id'] and File.readlines(VISITED, chomp: true).include? @object['id'])
+      return
+    end
+
+    save_item @object, File.join(INBOX[:dir], 'object', @object['type'].downcase, activity_name)
+    File.open(File.join(INBOX[:dir], 'visited'), 'a+') { |f| f.puts @object['id'] }
+  end
+
   # https://github.com/mastodon/mastodon/blob/main/app/controllers/concerns/signature_verification.rb
   def verify!
     # digest
-- 
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