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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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3 local set_metatable = Luan.set_metatable or error()
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4 local Number = require "luan:Number.luan"
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5 local long = Number.long or error()
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6 local Time = require "luan:Time.luan"
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7 local time_now = Time.now or error()
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8 local Db = require "site:/lib/Db.luan"
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9
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10
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11 local Post = {}
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12
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13 local function from_doc(doc)
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14 doc.type == "post" or error "wrong type"
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15 return Post.new {
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16 id = doc.id
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17 subject = doc.subject
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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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21 author_id = doc.post_author_id
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22 is_root = doc.post_is_root == "true"
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23 root_id = doc.post_root_id
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24 }
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25 end
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26
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27 local function to_doc(post)
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28 return {
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29 type = "post"
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30 id = post.id
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31 subject = post.subject or error()
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32 content = post.content or error()
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33 date = post.date or time_now()
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34 post_author_name = post.author_name or error()
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35 post_author_id = long(post.author_id)
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36 post_is_root = post.is_root and "true" or nil
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37 post_root_id = post.root_id and long(post.root_id)
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38 }
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39 end
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40
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41 local metatable = {}
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42 function metatable.__index(post,key)
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43 if key == "author" then
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44 local User = require "site:/lib/User.luan"
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45 return User.get_by_id(post.author_id)
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46 end
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47 return nil
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48 end
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49
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50 function Post.new(post)
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51
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52 function post.save()
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53 local doc = to_doc(post)
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54 Db.save(doc)
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55 post.id = doc.id
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56 end
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57
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58 set_metatable(post,metatable)
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59 return post
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60 end
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61
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62 function Post.get_by_id(id)
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63 local doc = Db.get_document("id:"..id)
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64 return doc and Post.from_doc(doc)
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65 end
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66
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67 function Post.new_thread(author,subject,content)
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68 return Db.run_in_transaction( function()
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69 local post = Post.new{
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70 subject = subject
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71 content = content
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72 author_name = author.name
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73 author_id = author.id
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74 is_root = true
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75 }
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76 post.save()
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77 post.root_id = post.id or error()
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78 post.save()
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79 return post
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80 end )
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81 end
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82
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83 return Post
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