add s3 log search

lib/travis/api/v3/queries/log.rb

@@ -1,16 +1,36 @@
 module Travis::API::V3
   class Queries::Log < Query
+    require 'net/http'
+    require 'uri'
+
     def find(job)
-      #TODO check for the log in the DB, if it's not there then fetch it from S3.
+      #check for the log in the DB
       log = Models::Log.find_by_job_id
-      #if the log exists and has not bee archived yet, then collect the log_parts and return the contents
+      #if the log exists and has not been archived yet, then collect the log_parts and return the contents
       unless log.nil? || !log.archived_at.nil?
         log_parts = Models::Log::Part.where(log_id: log.id)
-        log_parts.each { |log_part| contents << log_part.content }
-        contents
-      else
-        #go look in S3
+        log_data = []
+        log_parts.each { |log_part| log_data << log_part.content }
+        log_data
+      elsif log.archived_at?
+        # if it's not there then fetch it from S3.
+        archived_log_path = archive_url("/jobs/#{params[:job.id]}/log.txt")
+
+        content = open(Net::HTTP.get(URI.parse(archived_log_path)))
+        archived_log_data = []
+        content.each_line do |line|
+          archived_log_data << line.chop
+        end
+        archived_log_data
       end
     end
+
+    def archive_url(path)
+      "https://s3.amazonaws.com/#{hostname('archive')}#{path}"
+    end
+
+    def hostname(name)
+      "#{name}#{'-staging' if Travis.env == 'staging'}.#{Travis.config.host.split('.')[-2, 2].join('.')}"
+    end
   end
 end