prosody-modules
a0937b5cfdcb
mod_mam/fallback_archive.lib.lua

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mod_mam/fallback_archive.lib.lua @ 4210:a0937b5cfdcb

mod_invites_page: Remove preauth URI button This button is incompatible with the majority of XMPP clients around, yet based on feedback from users, many are drawn to click it when they have any XMPP client installed already. In the case where the user already has software installed, we would prefer them to select it from the software list so they can follow the setup process suited to their specific client (we already track which software supports preauth URIs). If their client is not listed, they can still use the manual registration link instead.
author Matthew Wild <mwild1@gmail.com>
date Fri, 16 Oct 2020 11:03:38 +0100
parent 2508:03f6d9ed2903
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2023
98b4794b72e4 mod_mam: Include an in-memory fallback driver
Kim Alvefur <zash@zash.se>
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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 qstart = query.start or -math.huge;
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69 local qend = query["end"] or math.huge;
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70 local qwith = query.with;
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71 store[username] = nil;
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72 for i = 1, #archive do
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73 local item = archive[i];
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74 local when, with = item.when, item.when;
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75 -- Add things that don't match the query
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76 if not ((not qwith or qwith == item.with) and item.when >= qstart and item.when <= qend) then
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77 self:append(username, item.key, item.value, when, with);
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78 end
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79 end
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80 return true;
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81 end
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82
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83 return archive_store;