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# Encapsulates a bug's history
module Bugzilla
class History
attr_reader :changes
# Creates a new History for the Bug object +bug+.
def initialize(bug)
unless bug.respond_to? :bug_id
raise ArgumentError, "Need a bug (or something that at least looks like a bug)"
end
begin
html = Nokogiri::HTML(Glsamaker::HTTP.get("http://bugs.gentoo.org/show_activity.cgi?id=#{bug.bug_id}"))
rescue Exception => e
raise ArgumentError, "Couldn't load the bug history: #{e.message}"
end
@changes = []
change_cache = nil
html.xpath("/html/body/table/tr").each do |change|
# ignore header line
next if change.children.first.name == "th"
# First line in a multi-change set
unless (chcount = change.children.first["rowspan"]) == nil
change_cache = Change.new(change.children.first.content.strip, change.children[2].content.strip)
change_cache.add_change(
change.children[4].content.strip.downcase.to_sym,
change.children[6].content.strip,
change.children[8].content.strip
)
@changes << change_cache
else
change_cache.add_change(
change.children[0].content.strip.downcase.to_sym,
change.children[2].content.strip,
change.children[4].content.strip
)
end
end
end
# Returns an Array of Changes made to the field +field+
def by_field(field)
raise(ArgumentError, "Symbol expected") unless field.is_a? Symbol
changes = []
@changes.each do |change|
if change.changes.has_key?(field)
changes << change
end
end
changes
end
# Returns an Array of Changes made by the user +user+
def by_user(user)
changes = []
@changes.each do |change|
if change.user == user
changes << change
end
end
changes
end
end
# This represents a single Change made to a Bug
class Bugzilla::Change
attr_reader :user, :time, :changes
# Creates a new Change made by +user+ at +time+.
def initialize(user, time)
@user = user || ""
@time = Time.parse(time)
@changes = {}
end
# Adds a changed +field+ to the Change object. +removed+ denotes the removed text
# and +added+ is the new text
def add_change(field, removed, added)
raise(ArgumentError, "field has to be a symbol") unless field.is_a? Symbol
if @changes.has_key?(field)
@changes[field][0] += " #{removed}"
@changes[field][1] += " #{added}"
else
@changes[field] = [removed, added]
end
end
# Returns a string representation
def to_s
"#{@user} changed at #{@time.to_s}: #{@changes.inspect}"
end
end
end
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