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8
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1 local Luan = require "luan:Luan.luan"
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2 local error = Luan.error
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9
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3 local ipairs = Luan.ipairs or error()
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8
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4 local set_metatable = Luan.set_metatable or error()
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5 local Time = require "luan:Time.luan"
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6 local time_now = Time.now or error()
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9
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7 local Html = require "luan:Html.luan"
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8 local html_encode = Html.encode or error()
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42
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9 local Number = require "luan:Number.luan"
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10 local long = Number.long or error()
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8
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11 local Db = require "site:/lib/Db.luan"
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12
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13
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14 local Post = {}
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15
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18
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16 local times = {
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17 {
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18 time = 1000*60*60*24*365
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19 unit = "year"
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20 }
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21 {
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22 time = 1000*60*60*24*7
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23 unit = "week"
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24 }
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25 {
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26 time = 1000*60*60*24
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27 unit = "day"
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28 }
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29 {
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30 time = 1000*60*60
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31 unit = "hour"
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32 }
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33 {
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34 time = 1000*60
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35 unit = "minute"
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36 }
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37 }
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38
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8
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39 local function from_doc(doc)
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40 doc.type == "post" or error "wrong type"
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41 return Post.new {
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42 id = doc.id
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43 content = doc.content
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44 date = doc.date
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45 author_name = doc.post_author_name
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9
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46 root_id = doc.post_root_id
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42
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47 is_root = doc.post_is_root == "true"
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9
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48
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49 -- root only
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50 subject = doc.subject
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8
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51 }
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52 end
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53
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54 local function to_doc(post)
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55 return {
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56 type = "post"
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57 id = post.id
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58 content = post.content or error()
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42
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59 date = long(post.date)
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8
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60 post_author_name = post.author_name or error()
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42
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61 post_root_id = long(post.root_id)
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62 post_is_root = post.is_root and "true" or nil
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9
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63
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64 -- root only
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65 subject = post.subject
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8
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66 }
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67 end
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68
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69 local metatable = {}
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70 function metatable.__index(post,key)
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71 if key == "author" then
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72 local User = require "site:/lib/User.luan"
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10
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73 return User.get_by_name(post.author_name)
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8
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74 end
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9
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75 if key == "subject_html" then
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76 return post.subject and html_encode(post.subject)
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77 end
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78 if key == "root" then
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79 return post.is_root and post or Post.get_by_id(post.root_id)
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80 end
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8
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81 return nil
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82 end
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83
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84 function Post.new(post)
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42
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85 post.date = post.date or time_now()
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8
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86
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87 function post.save()
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88 local doc = to_doc(post)
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89 Db.save(doc)
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90 post.id = doc.id
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91 end
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92
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42
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93 function post.delete()
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94 Db.run_in_transaction( function()
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95 not post.is_root or Post.thread_size(post.root_id) == 1 or error "can't delete root post with replies"
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96 Db.delete("id:"..post.id)
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9
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97 end )
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98 end
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99
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16
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100 function post.author_is_current()
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101 local User = require "site:/lib/User.luan"
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102 local user = User.current()
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103 return user ~= nil and user.name == post.author_name
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104 end
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105
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18
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106 function post.ago(now)
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107 local diff = now - post.date
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108 for _, t in ipairs(times) do
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109 local n = diff // t.time
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110 if n > 0 then
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111 %><%=n%> <%=t.unit%><%
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112 if n > 1 then
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113 %>s<%
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114 end
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115 return
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116 end
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117 end
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118 %>0 minutes<%
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119 end
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120
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8
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121 set_metatable(post,metatable)
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122 return post
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123 end
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124
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125 function Post.get_by_id(id)
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126 local doc = Db.get_document("id:"..id)
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9
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127 return doc and from_doc(doc)
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8
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128 end
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129
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130 function Post.new_thread(author,subject,content)
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131 return Db.run_in_transaction( function()
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132 local post = Post.new{
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9
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133 subject = subject or error()
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8
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134 content = content
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135 author_name = author.name
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136 is_root = true
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137 }
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138 post.save()
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139 post.root_id = post.id or error()
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140 post.save()
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141 return post
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142 end )
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143 end
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144
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9
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145 function Post.from_docs(docs)
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146 local posts = {}
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147 for _, doc in ipairs(docs) do
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148 local post = from_doc(doc)
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149 posts[#posts+1] = post
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150 end
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151 return posts
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152 end
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153
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42
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154 function Post.thread_size(root_id)
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155 return Db.count("post_root_id:"..root_id)
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156 end
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157
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8
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158 return Post
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