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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 ipairs = Luan.ipairs or error()
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4 local stringify = Luan.stringify 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 float = Number.float or error()
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8 local Db = require "site:/lib/Db.luan"
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9 local Logging = require "luan:logging/Logging.luan"
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10 local logger = Logging.logger "Link"
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11
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12
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13 local Link = {}
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14
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15 local function from_doc(doc)
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16 doc.type == "link" or error "wrong type"
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17 return Link.new {
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18 id = doc.id
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19 url = doc.url
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20 title = doc.title
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21 owner_id = doc.link_owner_id
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22 user_id = doc.link_user_id
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23 order = doc.link_order
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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(link)
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28 return {
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29 type = "link"
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30 id = link.id
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31 url = link.url or error()
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32 title = link.title or error()
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33 link_owner_id = long(link.owner_id)
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34 link_user_id = long(link.user_id)
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35 link_order = float(link.order)
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36 }
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37 end
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38
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39 function Link.new(link)
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40
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41 function link.save()
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42 local doc = to_doc(link)
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43 Db.save(doc)
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44 link.id = doc.id
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45 end
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46
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47 function link.reload()
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48 return Link.get_by_id(link.id) or error(link.id)
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49 end
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50
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51 function link.delete()
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52 Db.run_in_transaction( function()
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53 Db.delete("id:"..link.id)
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54 end )
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55 end
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56
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57 function link.move_after(prev)
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58 local links = Link.get_owner_links(link.owner_id)
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59 if prev == nil then
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60 link.order = links[1].order - 1
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61 else
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62 link.owner_id==prev.owner_id or error()
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63 for i, x in ipairs(links) do
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64 if prev.id == x.id then
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65 if i == #links then
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66 link.order = prev.order + 1
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67 else
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68 local next = links[i+1]
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69 link.order = (prev.order + next.order) / 2
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70 end
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71 return
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72 end
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73 end
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74 error()
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75 end
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76 end
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77
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78 return link
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79 end
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80
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81 function Link.get_by_id(id)
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82 local doc = Db.get_document("id:"..id)
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83 return doc and from_doc(doc)
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84 end
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85
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86 local function from_docs(docs)
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87 local links = {}
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88 for _, doc in ipairs(docs) do
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89 local link = from_doc(doc)
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90 links[#links+1] = link
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91 end
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92 return links
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93 end
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94
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95 function Link.get_owner_links(owner_id)
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96 local docs = Db.search("link_owner_id:"..owner_id,1,1000,{sort="link_order"})
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97 return from_docs(docs)
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98 end
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99
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100 return Link
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