Template renderer

dist/pigeon.rb

@@ -9,6 +9,7 @@ require "pry"
 require_relative File.join("pigeon", "config.rb")
 require_relative File.join("pigeon", "key_pair.rb")
 require_relative File.join("pigeon", "storage.rb")
+require_relative File.join("pigeon", "template.rb")
 require_relative File.join("pigeon", "message.rb")
 
 module Pigeon

dist/pigeon/message.rb

@@ -1,35 +1,40 @@
 module Pigeon
   class Message
-    NAME_OF_DRAFT = "HEAD"
+    NAME_OF_DRAFT = "HEAD.draft"
 
     attr_reader :author,
                 :kind,
-                :previous,
+                :prev,
                 :body,
-                :sequence, # Maybe not?
+                :depth,
                 :timestamp, # Maybe not?
                 :signature # Maybe not?
 
     def initialize(author:,
                    kind:,
-                   previous: nil,
+                   prev: nil,
                    body: [],
                    timestamp: Time.now.to_i)
       @author = author
       @kind = kind
-      @previous = previous
+      @prev = prev
       @body = body
       @timestamp = timestamp
     end
 
-    def self.create(kind:, previous: nil, body: [])
+    def self.create(kind:, prev: nil, body: {})
       # instantiate
       msg = self.new(author: KeyPair.current.public_key,
                      kind: kind,
-                     previous: previous,
+                     prev: prev,
                      body: body)
       # Save to disk as HEAD
       Pigeon::Storage.current.set_config(NAME_OF_DRAFT, Marshal.dump(msg))
+      msg
+    end
+
+    def serialize
+      Template.new(self).render
     end
   end
 end

dist/pigeon/template.rb

@@ -0,0 +1,32 @@
+require "erb"
+
+module Pigeon
+  # Wrapper around a message to perform string templating.
+  # Renders a string that is a Pigeon-compliant message.
+  class Template
+    TPL_DIR = "views"
+
+    HEADER_TPL = File.read(File.join(TPL_DIR, "1_header.erb"))
+    BODY_TPL = File.read(File.join(TPL_DIR, "2_body.erb"))
+    FOOTER_TPL = File.read(File.join(TPL_DIR, "3_footer.erb"))
+
+    COMPLETE_TPL = [HEADER_TPL, BODY_TPL, FOOTER_TPL].join("")
+
+    attr_reader :message
+
+    def initialize(message)
+      @message = message
+    end
+
+    def render
+      author = message.author
+      body = message.body
+      kind = message.kind
+      depth = message.depth || "DRAFT"
+      prev = message.prev || "DRAFT"
+      signature = message.signature || "DRAFT"
+
+      ERB.new(COMPLETE_TPL).result(binding)
+    end
+  end
+end

pigeon-cli

@@ -76,7 +76,7 @@ module Pigeon
     desc "create", "Begin a new Pigeon message"
 
     def create(kind)
-      puts Pigeon::Message.create(kind: kind)
+      puts Pigeon::Message.create(kind: kind).serialize
     end
   end
 

scratchpad.md

@@ -0,0 +1,3 @@
+WE need to know:
+
+ * What's the current `sequence` number?

views/1_header.erb

@@ -0,0 +1,4 @@
+author <%= author %>
+depth <%= depth %>
+kind <%= kind %>
+prev <%= prev %>

views/2_body.erb

@@ -0,0 +1,3 @@
+<% body.to_a.each do |k, v| %>
+<%= k %>:<%= v %>
+<% end %>

views/3_footer.erb

@@ -0,0 +1,5 @@
+<% if signature %>
+signature <%= signature %>
+<% else %>
+signature UNSIGNED
+<% end %>