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12
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1 local Luan = require "luan:Luan.luan"
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2 local error = Luan.error
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3 local type = Luan.type or error()
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4 local ipairs = Luan.ipairs or error()
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5 local stringify = Luan.stringify or error()
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13
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6 local Io = require "luan:Io.luan"
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7 local output_of = Io.output_of or error()
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12
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8 local Parsers = require "luan:Parsers.luan"
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9 local bbcode_parse = Parsers.bbcode_parse or error()
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10 local Html = require "luan:Html.luan"
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11 local html_encode = Html.encode or error()
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21
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12 local html_parse = Html.parse or error()
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12
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13 local Table = require "luan:Table.luan"
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14 local is_list = Table.is_list or error()
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21
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15 local concat = Table.concat or error()
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13
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16 local String = require "luan:String.luan"
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17 local gsub = String.gsub or error()
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21
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18 local matches = String.matches or error()
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23
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19 local match = String.match or error()
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12
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20 local User = require "site:/lib/User.luan"
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13
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21 local Shared = require "site:/lib/Shared.luan"
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22 local list_to_set = Shared.list_to_set or error()
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20
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23 local to_list = Shared.to_list or error()
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12
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24 local Logging = require "luan:logging/Logging.luan"
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25 local logger = Logging.logger "Bbcode"
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26
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27
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28 local Bbcode = {}
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29
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30 local to_html
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31 local html = {}
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32
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20
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33 function html.b(bbcode,options)
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34 %><b><% to_html(bbcode.contents,options) %></b><%
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35 end
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36
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37 function html.i(bbcode,options)
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38 %><i><% to_html(bbcode.contents,options) %></i><%
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39 end
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40
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41 function html.u(bbcode,options)
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42 %><u><% to_html(bbcode.contents,options) %></u><%
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12
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43 end
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44
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20
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45 function html.s(bbcode,options)
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46 %><s><% to_html(bbcode.contents,options) %></s><%
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12
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47 end
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48
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20
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49 function html.sup(bbcode,options)
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50 %><sup><% to_html(bbcode.contents,options) %></sup><%
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12
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51 end
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52
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20
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53 function html.brackets(bbcode,options)
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54 %>[<% to_html(bbcode.contents,options) %>]<%
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55 end
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56
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57 function html.url(bbcode,options)
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12
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58 local url = bbcode.param
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59 if url == nil then
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60 url = html_encode(bbcode.contents)
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61 %><a href="<%=url%>"><%=url%></a><%
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62 else
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63 url = html_encode(url)
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20
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64 %><a href="<%=url%>"><% to_html(bbcode.contents,options) %></a><%
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12
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65 end
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66 end
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67
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20
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68 function html.code(bbcode,options)
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69 local s = gsub(bbcode.contents,[[^\n]],"")
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70 %><code><%= html_encode(s) %></code><%
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71 options.strip_newline = true
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12
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72 end
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73
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20
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74 function html.img(bbcode,options)
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12
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75 %><img src="<%= html_encode(bbcode.contents) %>"><%
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76 end
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77
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20
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78 function html.color(bbcode,options)
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79 %><span style="color:<%=bbcode.param%>"><% to_html(bbcode.contents,options) %></span><%
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12
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80 end
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81
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20
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82 function html.size(bbcode,options)
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23
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83 %><span style="font-size:<%=bbcode.param%>"><% to_html(bbcode.contents,options) %></span><%
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12
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84 end
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85
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20
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86 function html.quote(bbcode,options)
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12
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87 %><blockquote><%
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88 local user_name = bbcode.param
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89 if user_name ~= nil then
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90 local user = User.get_by_name(user_name)
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91 if user == nil then
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92 %><%= user_name %> wrote:<%
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93 else
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94 %><a href="/user_something"><%= user_name %></a> wrote:<%
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95 end
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20
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96 else
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97 options.strip_newline = true
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12
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98 end
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20
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99 to_html(bbcode.contents,options)
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12
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100 %></blockquote><%
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20
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101 options.strip_newline = true
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12
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102 end
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103
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23
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104 local youtube_ptn1 = [[https://youtu.be/([a-zA-Z0-9_-]+)(?:\?t=([0-9]+))?]]
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105 local youtube_ptn2 = [[https://www.youtube.com/watch\?v=([a-zA-Z0-9_-]+)(?:&t=([0-9]+)s)?]]
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106 local bitchute_ptn = [[https://www.bitchute.com/video/([a-zA-Z0-9]+)/]]
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107
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20
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108 function html.video(bbcode,options)
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23
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109 local url = bbcode.contents
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110 local id, start = match(url,youtube_ptn1)
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111 if id == nil then
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112 id, start = match(url,youtube_ptn2)
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113 end
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114 if id ~= nil then
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115 %><iframe width="560" height="315" src="https://www.youtube.com/embed/<%=id%><%
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12
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116 if start ~= nil then
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117 %>?start=<%=start%><%
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118 end
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119 %>" frameborder="0" allowfullscreen></iframe><%
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23
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120 return
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12
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121 end
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23
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122 id = match(url,bitchute_ptn)
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123 if id ~= nil then
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124 %><iframe width="560" height="315" scrolling="no" frameborder="0" style="border: none;" src="https://www.bitchute.com/embed/<%=id%>/"></iframe><%
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125 return
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126 end
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127 url = html_encode(url)
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128 %><a href="<%=url%>"><%=url%></a><%
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12
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129 end
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130
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20
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131 local function list_to_html(bbcode,options)
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132 local list = to_list(bbcode.contents)
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133 for _, item in ipairs(list) do
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134 if type(item) == "table" and item.name == "li" then
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135 %><li><% to_html(item.contents,options) %></li><%
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136 end
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137 end
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138 options.strip_newline = true
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139 end
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140
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141 function html.ul(bbcode,options)
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142 %><ul><%
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143 list_to_html(bbcode,options)
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144 %></ul><%
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145 end
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146
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147 function html.ol(bbcode,options)
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148 %><ol><%
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149 list_to_html(bbcode,options)
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150 %></ol><%
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151 end
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152
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153 function to_html(bbcode,options)
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154 if options.strip_newline then
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155 if type(bbcode) == "string" then
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156 bbcode = gsub(bbcode,[[^\n]],"")
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157 end
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158 options.strip_newline = false
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159 end
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12
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160 if type(bbcode) == "string" then
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161 %><%= html_encode(bbcode) %><%
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162 else
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163 type(bbcode) == "table" or error()
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164 if is_list(bbcode) then
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165 for _, v in ipairs(bbcode) do
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20
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166 to_html(v,options)
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12
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167 end
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168 else
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169 local fn = html[bbcode.name] or error(bbcode.name.." not handled")
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20
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170 fn(bbcode,options)
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12
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171 end
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172 end
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173 end
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174
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175 function Bbcode.to_html(bbcode)
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176 bbcode = bbcode_parse(bbcode)
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20
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177 %><div message><%
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178 to_html(bbcode,{strip_newline=false})
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179 %></div><%
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12
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180 end
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181
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13
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182
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183 local doesnt_nest = list_to_set{
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184 "url"
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185 "code"
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186 "img"
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187 "video"
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188 }
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189
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190 local function preprocess(bbcode)
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191 if type(bbcode) == "string" then
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192 bbcode = gsub( bbcode, [[(^|\s)(https?://\S+)]], "$1[url]$2[/url]" )
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193 %><%= bbcode %><%
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194 else
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195 type(bbcode) == "table" or error()
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196 if is_list(bbcode) then
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197 for _, v in ipairs(bbcode) do
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198 preprocess(v)
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199 end
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200 else
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201 local name = bbcode.name
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202 local param = bbcode.param
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203 %>[<%=name%><%
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204 if param ~= nil then
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205 %>=<%=param%><%
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206 end
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207 %>]<%
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208 if doesnt_nest[name] then
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209 %><%=bbcode.contents%><%
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210 else
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211 preprocess(bbcode.contents)
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212 end
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20
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213 if name == "code" and param ~= nil then
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214 %>[/<%=name%>=<%=param%>]<%
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215 else
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216 %>[/<%=name%>]<%
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217 end
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13
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218 end
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219 end
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220 end
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221
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222 function Bbcode.preprocess(bbcode)
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223 bbcode = bbcode_parse(bbcode)
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224 return output_of(function()
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225 preprocess(bbcode)
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226 end)
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227 end
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228
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21
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229 function Bbcode.remove_html(text)
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230 local ends_with_newline = matches(text,[[\n$]])
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231 local t = {}
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232 local html = html_parse(text)
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233 local is_first = true
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234 for _, v in ipairs(html) do
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235 if type(v) == "string" then
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236 t[#t+1] = v
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237 else
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238 local name = v.name
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239 if name == "div" then
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240 if not is_first then
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241 t[#t+1] = "\n"
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242 end
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243 elseif name == "/div" or name == "br" then
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244 -- ignore
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245 else
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246 error("unexpected tag: "..name)
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247 end
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248 end
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249 is_first = false
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250 end
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251 if not ends_with_newline then
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252 t[#t+1] = "\n"
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253 end
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254 return concat(t)
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255 end
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256
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257
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12
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258 return Bbcode
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