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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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8
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9 local Db = require "site:/lib/Db.luan"
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10
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11
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12 local Post = {}
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13
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14 local function from_doc(doc)
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15 doc.type == "post" or error "wrong type"
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16 return Post.new {
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17 id = doc.id
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18 content = doc.content
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19 date = doc.date
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20 author_name = doc.post_author_name
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9
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21 root_id = doc.post_root_id
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22
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23 -- root only
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24 subject = doc.subject
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8
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25 is_root = doc.post_is_root == "true"
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9
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26
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27 -- replies only
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28 parent_id = doc.parent_id
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8
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29 }
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30 end
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31
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32 local function to_doc(post)
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33 return {
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34 type = "post"
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35 id = post.id
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36 content = post.content or error()
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37 date = post.date or time_now()
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38 post_author_name = post.author_name or error()
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10
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39 post_root_id = post.root_id
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9
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40
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41 -- root only
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42 subject = post.subject
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8
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43 post_is_root = post.is_root and "true" or nil
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9
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44
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45 -- replies only
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46 parent_id = post.parent_id
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8
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47 }
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48 end
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49
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50 local metatable = {}
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51 function metatable.__index(post,key)
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52 if key == "author" then
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53 local User = require "site:/lib/User.luan"
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10
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54 return User.get_by_name(post.author_name)
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8
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55 end
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9
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56 if key == "subject_html" then
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57 return post.subject and html_encode(post.subject)
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58 end
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59 if key == "root" then
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60 return post.is_root and post or Post.get_by_id(post.root_id)
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61 end
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8
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62 return nil
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63 end
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64
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65 function Post.new(post)
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66
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67 function post.save()
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68 local doc = to_doc(post)
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69 Db.save(doc)
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70 post.id = doc.id
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71 end
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72
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9
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73 function post.reply(author,content)
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74 return Db.run_in_transaction( function()
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75 local post = Post.new{
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76 root_id = post.root_id
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77 parent_id = post.id
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78 content = content
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79 author_name = author.name
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80 }
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81 post.save()
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82 return post
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83 end )
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84 end
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85
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8
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86 set_metatable(post,metatable)
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87 return post
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88 end
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89
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90 function Post.get_by_id(id)
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91 local doc = Db.get_document("id:"..id)
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9
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92 return doc and from_doc(doc)
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8
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93 end
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94
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95 function Post.new_thread(author,subject,content)
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96 return Db.run_in_transaction( function()
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97 local post = Post.new{
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9
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98 subject = subject or error()
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8
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99 content = content
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100 author_name = author.name
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101 is_root = true
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102 }
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103 post.save()
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104 post.root_id = post.id or error()
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105 post.save()
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106 return post
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107 end )
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108 end
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109
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9
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110 function Post.from_docs(docs)
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111 local posts = {}
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112 for _, doc in ipairs(docs) do
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113 local post = from_doc(doc)
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114 posts[#posts+1] = post
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115 end
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116 return posts
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117 end
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118
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8
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119 return Post
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