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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 Number = require "luan:Number.luan"
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6 local long = Number.long or error()
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7 local Time = require "luan:Time.luan"
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8 local time_now = Time.now or error()
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9
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9 local Html = require "luan:Html.luan"
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10 local html_encode = Html.encode 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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16 local function from_doc(doc)
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17 doc.type == "post" or error "wrong type"
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18 return Post.new {
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19 id = doc.id
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20 content = doc.content
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21 date = doc.date
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22 author_name = doc.post_author_name
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23 author_id = doc.post_author_id
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9
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24 root_id = doc.post_root_id
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25
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26 -- root only
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27 subject = doc.subject
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8
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28 is_root = doc.post_is_root == "true"
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9
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29
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30 -- replies only
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31 parent_id = doc.parent_id
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8
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32 }
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33 end
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34
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35 local function to_doc(post)
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36 return {
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37 type = "post"
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38 id = post.id
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39 content = post.content or error()
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40 date = post.date or time_now()
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41 post_author_name = post.author_name or error()
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42 post_author_id = long(post.author_id)
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9
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43 post_root_id = post.root_id and long(post.root_id)
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44
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45 -- root only
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46 subject = post.subject
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8
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47 post_is_root = post.is_root and "true" or nil
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9
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48
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49 -- replies only
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50 parent_id = post.parent_id
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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 metatable = {}
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55 function metatable.__index(post,key)
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56 if key == "author" then
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57 local User = require "site:/lib/User.luan"
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58 return User.get_by_id(post.author_id)
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59 end
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9
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60 if key == "subject_html" then
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61 return post.subject and html_encode(post.subject)
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62 end
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63 if key == "root" then
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64 return post.is_root and post or Post.get_by_id(post.root_id)
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65 end
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8
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66 return nil
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67 end
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68
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69 function Post.new(post)
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70
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71 function post.save()
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72 local doc = to_doc(post)
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73 Db.save(doc)
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74 post.id = doc.id
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75 end
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76
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9
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77 function post.reply(author,content)
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78 return Db.run_in_transaction( function()
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79 local post = Post.new{
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80 root_id = post.root_id
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81 parent_id = post.id
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82 content = content
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83 author_name = author.name
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84 author_id = author.id
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85 }
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86 post.save()
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87 return post
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88 end )
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89 end
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90
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8
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91 set_metatable(post,metatable)
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92 return post
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93 end
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94
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95 function Post.get_by_id(id)
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96 local doc = Db.get_document("id:"..id)
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9
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97 return doc and from_doc(doc)
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8
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98 end
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99
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100 function Post.new_thread(author,subject,content)
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101 return Db.run_in_transaction( function()
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102 local post = Post.new{
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9
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103 subject = subject or error()
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8
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104 content = content
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105 author_name = author.name
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106 author_id = author.id
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107 is_root = true
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108 }
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109 post.save()
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110 post.root_id = post.id or error()
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111 post.save()
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112 return post
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113 end )
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114 end
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115
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9
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116 function Post.from_docs(docs)
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117 local posts = {}
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118 for _, doc in ipairs(docs) do
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119 local post = from_doc(doc)
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120 posts[#posts+1] = post
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121 end
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122 return posts
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123 end
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124
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8
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125 return Post
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