gitlab-org--gitlab-foss/app/models/network/graph.rb

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