Mercurial > prosody-modules
annotate mod_mam/fallback_archive.lib.lua @ 2391:85d04dd87f14
mod_reload_components: add new module and README file.
author | Camilo <camilo@camilo.fm> |
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date | Mon, 21 Nov 2016 16:18:32 -0200 |
parents | 98b4794b72e4 |
children | 03f6d9ed2903 |
rev | line source |
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2023
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1 -- luacheck: ignore 212/self |
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2 |
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3 local uuid = require "util.uuid".generate; |
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4 local store = module:shared("archive"); |
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5 local archive_store = { _provided_by = "mam"; name = "fallback"; }; |
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6 |
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7 function archive_store:append(username, key, value, when, with) |
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8 local archive = store[username]; |
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9 if not archive then |
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10 archive = { [0] = 0 }; |
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11 store[username] = archive; |
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12 end |
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13 local index = (archive[0] or #archive)+1; |
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14 local item = { key = key, when = when, with = with, value = value }; |
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15 if not key or archive[key] then |
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16 key = uuid(); |
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17 item.key = key; |
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18 end |
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19 archive[index] = item; |
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20 archive[key] = index; |
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21 archive[0] = index; |
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22 return key; |
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23 end |
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24 |
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25 function archive_store:find(username, query) |
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26 local archive = store[username] or {}; |
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27 local start, stop, step = 1, archive[0] or #archive, 1; |
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28 local qstart, qend, qwith = -math.huge, math.huge; |
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29 local limit; |
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30 |
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31 if query then |
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32 if query.reverse then |
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33 start, stop, step = stop, start, -1; |
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34 if query.before and archive[query.before] then |
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35 start = archive[query.before] - 1; |
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36 end |
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37 elseif query.after and archive[query.after] then |
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38 start = archive[query.after] + 1; |
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39 end |
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40 qwith = query.with; |
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41 limit = query.limit; |
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42 qstart = query.start or qstart; |
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43 qend = query["end"] or qend; |
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44 end |
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45 |
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46 return function () |
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47 if limit and limit <= 0 then return end |
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48 for i = start, stop, step do |
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49 local item = archive[i]; |
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50 if (not qwith or qwith == item.with) and item.when >= qstart and item.when <= qend then |
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51 if limit then limit = limit - 1; end |
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52 start = i + step; -- Start on next item |
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53 return item.key, item.value, item.when, item.with; |
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54 end |
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55 end |
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56 end |
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57 end |
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58 |
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59 function archive_store:delete(username, query) |
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60 if not query or next(query) == nil then |
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61 -- no specifics, delete everything |
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62 store[username] = nil; |
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63 return true; |
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64 end |
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65 local archive = store[username]; |
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66 if not archive then return true; end -- no messages, nothing to delete |
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67 |
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68 local start, stop, step = 1, archive[0] or #archive, 1; |
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69 local qstart = query.start or -math.huge; |
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70 local qend = query["end"] or math.huge; |
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71 local qwith = query.with; |
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72 store[username] = nil; |
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73 for i = 1, #archive do |
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74 local item = archive[i]; |
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75 local when, with = item.when, item.when; |
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76 -- Add things that don't match the query |
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77 if not ((not qwith or qwith == item.with) and item.when >= qstart and item.when <= qend) then |
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78 self:append(username, item.key, item.value, when, with); |
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79 end |
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80 end |
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81 return true; |
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82 end |
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83 |
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84 return archive_store; |