Graph: build json

1 files changed, 82 insertions, 0 deletions

diff --git a/lib/graph_commit.rb b/lib/graph_commit.rb
new file mode 100644
index 00000000000..ee765cb4ef2
--- /dev/null
+++ b/lib/graph_commit.rb
@@ -0,0 +1,82 @@
+require "grit"
+
+class GraphCommit
+  attr_accessor :time, :space
+  def initialize(commit)
+    @_commit = commit
+    @time = -1
+    @space = 0
+  end
+
+  def method_missing(m, *args, &block)
+    @_commit.send(m, *args, &block)
+  end
+
+  # Method is adding time and space on the 
+  # list of commits. As well as returns date list 
+  # corelated with time set on commits.
+  #
+  # @param [Array<GraphCommit>] comits to index
+  #
+  # @return [Array<TimeDate>] list of commit dates corelated with time on commits 
+  def self.index_commits(commits)
+    days, heads = [], []
+    map = {}
+
+    commits.reverse.each_with_index do |c,i|
+      c.time = i
+      days[i]=c.committed_date 
+      map[c.id] = c
+      heads += c.refs unless c.refs.nil?
+    end
+
+    heads.select!{|h| h.is_a? Grit::Head or h.is_a? Grit::Remote}
+    # sort heads so the master is top and current branches are closer
+    heads.sort! do |a,b|
+      if a.name == "master"
+        -1
+      elsif b.name == "master" 
+        1
+      else
+        b.commit.committed_date <=> a.commit.committed_date
+      end
+    end
+
+    j = 0
+    heads.each do |h|
+      if map.include? h.commit.id then
+        j = mark_chain(j+=1, map[h.commit.id], map)        
+      end
+    end
+    days
+  end
+
+  # Add space mark on commit and its parents
+  #
+  # @param [Fixnum] space (row on the graph) to be set
+  # @param [GraphCommit] the commit object.
+  # @param [Hash<String,GraphCommit>] map of commits 
+  #
+  # @return [Fixnum] max space used.	
+  def self.mark_chain(mark, commit, map)
+    commit.space = mark  if commit.space == 0
+    m1 = mark - 1
+    marks = commit.parents.collect do |p|
+      if map.include? p.id  and map[p.id].space == 0 then
+        mark_chain(m1+=1, map[p.id],map) 
+      else
+        m1 + 1
+      end
+    end
+    marks << mark
+    marks.compact.max
+  end
+  
+  def self.add_refs(commit, ref_cache)
+    if ref_cache.empty?
+      @repo.refs.each {|ref| ref_cache[ref.commit.id] ||= [];ref_cache[ref.commit.id] << ref}
+    end
+    commit.refs = ref_cache[commit.id] if ref_cache.include? commit.id
+    commit.refs ||= []
+  end
+end