[whimsy] branch master updated: rough in a 'bot' to log changes to the agenda

[rubys]

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rubys pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/whimsy.git


The following commit(s) were added to refs/heads/master by this push:
     new 31c045f  rough in a 'bot' to log changes to the agenda
31c045f is described below

commit 31c045f87087c94225a61918c3eaae6b9af94f25
Author: Sam Ruby <ru...@intertwingly.net>
AuthorDate: Tue Jun 12 13:11:39 2018 -0400

    rough in a 'bot' to log changes to the agenda
---
 www/board/agenda/views/models/agenda.js.rb |  2 ++
 www/board/agenda/views/models/chat.js.rb   | 54 ++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/www/board/agenda/views/models/agenda.js.rb 
b/www/board/agenda/views/models/agenda.js.rb
index a2209c1..8dfaa06 100644
--- a/www/board/agenda/views/models/agenda.js.rb
+++ b/www/board/agenda/views/models/agenda.js.rb
@@ -16,6 +16,7 @@ class Agenda
   # each instance to their next and previous items.
   def self.load(list, digest)
     return unless list
+    before = @@index
     @@digest = digest
     @@index = []
     prev = nil
@@ -55,6 +56,7 @@ class Agenda
 
     @@date = Date.new(@@index[0].timestamp).toISOString()[/(.*?)T/, 1]
     Main.refresh()
+    Chat.agenda_change(before, @@index)
     return @@index
   end
 
diff --git a/www/board/agenda/views/models/chat.js.rb 
b/www/board/agenda/views/models/chat.js.rb
index 43d6cd4..d964341 100644
--- a/www/board/agenda/views/models/chat.js.rb
+++ b/www/board/agenda/views/models/chat.js.rb
@@ -52,6 +52,60 @@ class Chat
     @@log
   end
 
+  # identify what changed in the agenda
+  def self.agenda_change(before, after)
+    return unless before and before.length > 0
+
+    # build an index of the 'before' agenda
+    index = {}
+    before.each do |item|
+      index[item.title] = item
+    end
+
+    # categorize each item in the 'after' agenda
+    add = []
+    change = []
+    after.each do |item|
+      before = index[item.title]
+      if not before
+        add << item
+      elsif before.missing or not item.missing
+        if before.digest != item.digest
+          if before.missing
+            add << item
+          else
+            change << item
+          end
+        end
+
+        index.delete item.title
+      end
+    end
+
+    # build a set of messages
+    messages = []
+    unless add.empty?
+      messages << "Added: #{add.map {|item| item.title}.join(', ')}"
+    end
+
+    unless change.empty?
+      messages << "Updated: #{change.map {|item| item.title}.join(', ')}"
+    end
+
+    missing = Object.values(index)
+    unless missing.empty?
+      messages << "Deleted: #{missing.map {|item| item.title}.join(', ')}"
+    end
+
+    # output the messages
+    unless messages.empty?
+      messages.each do |message|
+        Chat.add type: 'agenda', user: 'agenda', text: message
+      end
+      Main.refresh()
+    end
+  end
+
   # add an entry to the chat log
   def self.add(entry)
     entry.timestamp ||= Date.new().getTime()

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