296 lines
6.9 KiB
Ruby
296 lines
6.9 KiB
Ruby
require "grit"
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module Network
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class Graph
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attr_reader :days, :commits, :map, :notes
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def self.max_count
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@max_count ||= 650
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end
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def initialize project, ref, commit, filter_ref
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@project = project
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@ref = ref
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@commit = commit
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@filter_ref = filter_ref
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@repo = project.repo
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@commits = collect_commits
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@days = index_commits
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@notes = collect_notes
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end
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protected
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def collect_notes
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h = Hash.new(0)
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@project.notes.where('noteable_type = ?' ,"Commit").group('notes.commit_id').select('notes.commit_id, count(notes.id) as note_count').each do |item|
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h[item.commit_id] = item.note_count.to_i
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end
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h
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end
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# Get commits from repository
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#
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def collect_commits
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refs_cache = build_refs_cache
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find_commits(count_to_display_commit_in_center).map do |commit|
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# Decorate with app/model/network/commit.rb
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Network::Commit.new(commit, refs_cache[commit.id])
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end
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end
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# Method is adding time and space on the
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# list of commits. As well as returns date list
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# correlated with time set on commits.
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#
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# @return [Array<TimeDate>] list of commit dates correlated with time on commits
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def index_commits
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days = []
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@map = {}
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@reserved = {}
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@commits.each_with_index do |c,i|
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c.time = i
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days[i] = c.committed_date
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@map[c.id] = c
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@reserved[i] = []
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end
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commits_sort_by_ref.each do |commit|
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place_chain(commit)
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end
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# find parent spaces for not overlap lines
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@commits.each do |c|
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c.parent_spaces.concat(find_free_parent_spaces(c))
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end
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days
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end
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# Skip count that the target commit is displayed in center.
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def count_to_display_commit_in_center
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offset = -1
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skip = 0
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while offset == -1
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tmp_commits = find_commits(skip)
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if tmp_commits.size > 0
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index = tmp_commits.index do |c|
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c.id == @commit.id
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end
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if index
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# Find the target commit
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offset = index + skip
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else
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skip += self.class.max_count
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end
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else
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# Cant't find the target commit in the repo.
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offset = 0
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end
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end
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if self.class.max_count / 2 < offset then
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# get max index that commit is displayed in the center.
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offset - self.class.max_count / 2
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else
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0
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end
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end
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def find_commits(skip = 0)
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opts = {
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date_order: true,
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max_count: self.class.max_count,
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skip: skip
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}
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ref = @ref if @filter_ref
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Grit::Commit.find_all(@repo, ref, opts)
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end
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def commits_sort_by_ref
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@commits.sort do |a,b|
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if include_ref?(a)
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-1
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elsif include_ref?(b)
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1
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else
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b.committed_date <=> a.committed_date
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end
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end
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end
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def include_ref?(commit)
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heads = commit.refs.select do |ref|
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ref.is_a?(Grit::Head) or ref.is_a?(Grit::Remote) or ref.is_a?(Grit::Tag)
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end
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heads.map! do |head|
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head.name
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end
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heads.include?(@ref)
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end
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def find_free_parent_spaces(commit)
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spaces = []
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commit.parents(@map).each do |parent|
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range = commit.time..parent.time
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space = if commit.space >= parent.space then
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find_free_parent_space(range, parent.space, -1, commit.space)
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else
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find_free_parent_space(range, commit.space, -1, parent.space)
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end
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mark_reserved(range, space)
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spaces << space
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end
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spaces
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end
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def find_free_parent_space(range, space_base, space_step, space_default)
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if is_overlap?(range, space_default) then
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find_free_space(range, space_step, space_base, space_default)
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else
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space_default
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end
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end
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def is_overlap?(range, overlap_space)
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range.each do |i|
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if i != range.first &&
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i != range.last &&
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@commits[i].spaces.include?(overlap_space) then
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return true;
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end
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end
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false
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end
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# Add space mark on commit and its parents
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#
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# @param [::Commit] the commit object.
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def place_chain(commit, parent_time = nil)
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leaves = take_left_leaves(commit)
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if leaves.empty?
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return
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end
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time_range = leaves.first.time..leaves.last.time
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space_base = get_space_base(leaves)
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space = find_free_space(time_range, 2, space_base)
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leaves.each do |l|
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l.spaces << space
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# Also add space to parent
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l.parents(@map).each do |parent|
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if 0 < parent.space && parent.space < space
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parent.spaces << space
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end
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end
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end
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# and mark it as reserved
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if parent_time.nil?
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min_time = leaves.first.time
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else
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min_time = parent_time + 1
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end
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max_time = leaves.last.time
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leaves.last.parents(@map).each do |parent|
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if max_time < parent.time
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max_time = parent.time
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end
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end
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mark_reserved(min_time..max_time, space)
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# Visit branching chains
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leaves.each do |l|
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parents = l.parents(@map).select{|p| p.space.zero?}
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for p in parents
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place_chain(p, l.time)
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end
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end
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end
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def get_space_base(leaves)
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space_base = 1
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parents = leaves.last.parents(@map)
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if parents.size > 0
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if parents.first.space > 0
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space_base = parents.first.space
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end
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end
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space_base
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end
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def mark_reserved(time_range, space)
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for day in time_range
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@reserved[day].push(space)
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end
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end
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def find_free_space(time_range, space_step, space_base = 1, space_default = nil)
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space_default ||= space_base
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reserved = []
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for day in time_range
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reserved += @reserved[day]
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end
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reserved.uniq!
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space = space_default
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while reserved.include?(space) do
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space += space_step
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if space < space_base then
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space_step *= -1
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space = space_base + space_step
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end
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end
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space
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end
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# Takes most left subtree branch of commits
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# which don't have space mark yet.
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#
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# @param [::Commit] the commit object.
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#
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# @return [Array<Network::Commit>] list of branch commits
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def take_left_leaves(raw_commit)
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commit = @map[raw_commit.id]
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leaves = []
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leaves.push(commit) if commit.space.zero?
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while true
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return leaves if commit.parents(@map).count.zero?
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commit = commit.parents(@map).first
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return leaves unless commit.space.zero?
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leaves.push(commit)
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end
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end
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def build_refs_cache
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refs_cache = {}
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@repo.refs.each do |ref|
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refs_cache[ref.commit.id] = [] unless refs_cache.include?(ref.commit.id)
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refs_cache[ref.commit.id] << ref
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end
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refs_cache
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end
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end
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end
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