1 local old_draft_id = param.get("old_draft_id", atom.integer)

2 local new_draft_id = param.get("new_draft_id", atom.integer)

3

4 if not old_draft_id or not new_draft_id then

5 slot.put( _"Please choose two versions of the draft to compare")

6 return

7 end

8

9 if old_draft_id == new_draft_id then

10 slot.put( _"Please choose two different versions of the draft to compare")

11 return

12 end

13

14 if old_draft_id > new_draft_id then

15 local tmp = old_draft_id

16 old_draft_id = new_draft_id

17 new_draft_id = tmp

18 end

19

20 local old_draft = Draft:by_id(old_draft_id)

21 local new_draft = Draft:by_id(new_draft_id)

22

23 execute.view{

24 module = "draft",

25 view = "_head",

26 params = { draft = new_draft}

27 }

28

29 ui.title(_"Diff")

30

31 if app.session.member_id and not new_draft.initiative.revoked then

32 local supporter = Supporter:new_selector():add_where{"member_id = ?", app.session.member_id}:count()

33 if supporter then

34 ui.container{

35 attr = { class = "draft_updated_info" },

36 content = function()

37 slot.put(_"The draft of this initiative has been updated!")

38 slot.put(" ")

39 ui.link{

40 text = _"Refresh support to current draft",

41 module = "initiative",

42 action = "add_support",

43 id = new_draft.initiative.id,

44 routing = {

45 default = {

46 mode = "redirect",

47 module = "initiative",

48 view = "show",

49 id = new_draft.initiative.id

50 }

51 }

52 }

53 end

54 }

55 end

56 end

57

58 local old_draft_content = string.gsub(string.gsub(old_draft.content, "\n", " ###ENTER###\n"), " ", "\n")

59 local new_draft_content = string.gsub(string.gsub(new_draft.content, "\n", " ###ENTER###\n"), " ", "\n")

60

61 local key = multirand.string(26, "123456789bcdfghjklmnpqrstvwxyz");

62

63 local old_draft_filename = encode.file_path(request.get_app_basepath(), 'tmp', "diff-" .. key .. "-old.tmp")

64 local new_draft_filename = encode.file_path(request.get_app_basepath(), 'tmp', "diff-" .. key .. "-new.tmp")

65

66 local old_draft_file = assert(io.open(old_draft_filename, "w"))

67 old_draft_file:write(old_draft_content)

68 old_draft_file:write("\n")

69 old_draft_file:close()

70

71 local new_draft_file = assert(io.open(new_draft_filename, "w"))

72 new_draft_file:write(new_draft_content)

73 new_draft_file:write("\n")

74 new_draft_file:close()

75

76 local output, err, status = os.pfilter(nil, "sh", "-c", "diff -U 1000000000 '" .. old_draft_filename .. "' '" .. new_draft_filename .. "' | grep -v ^--- | grep -v ^+++ | grep -v ^@")

77

78 os.remove(old_draft_filename)

79 os.remove(new_draft_filename)

80

81 local last_state = "first_run"

82

83 local function process_line(line)

84 local state_char = string.sub(line, 1, 1)

85 local state

86 if state_char == "+" then

87 state = "added"

88 elseif state_char == "-" then

89 state = "removed"

90 elseif state_char == " " then

91 state = "unchanged"

92 end

93 local state_changed = false

94 if state ~= last_state then

95 if last_state ~= "first_run" then

96 slot.put("</span> ")

97 end

98 last_state = state

99 state_changed = true

100 slot.put("<span class=\"diff_" .. tostring(state) .. "\">")

101 end

102

103 line = string.sub(line, 2, #line)

104 if line ~= "###ENTER###" then

105 if not state_changed then

106 slot.put(" ")

107 end

108 slot.put(line)

109 else

110 slot.put("<br />")

111 end

112 end

113

114 if not status then

115 ui.field.text{ value = _"The drafts do not differ" }

116 else

117 ui.container{

118 tag = "div",

119 attr = { class = "diff" },

120 content = function()

121 output = output:gsub("[^\n\r]+", function(line)

122 process_line(line)

123 end)

124 end

125 }

126 end

127