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annotate mod_pubsub_feeds/feeds.lib.lua @ 4876:0f5f2d4475b9

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mod_http_xep227: Add support for import via APIs rather than direct store manipulation In particular this transitions PEP nodes and data to be imported via mod_pep's APIs, fixing issues with importing at runtime while PEP data may already be live in RAM. Next obvious candidate for this approach is rosters, so clients get immediate roster pushes and other special handling (such as emitting subscribes to reach the desired subscription state).
author Matthew Wild <mwild1@gmail.com>
date Tue, 18 Jan 2022 17:01:18 +0000
parents b328ca621ba6
children
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b149ea428b81 mod_pubsub_feeds: Switch to use util.xml for parsing feeds and include RSS to Atom translation code from lua-feeds
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1 local st = require "util.stanza";
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2 -- RSS->Atom translator
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3 -- http://code.matthewwild.co.uk/lua-feeds/
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4
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5 -- Helpers to translate item child elements
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6 local rss2atom = {};
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7 function rss2atom.title(atom_entry, tag)
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8 atom_entry:tag("title"):text(tag:get_text()):up();
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9 end
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11 function rss2atom.link(atom_entry, tag)
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12 atom_entry:tag("link", { href = tag:get_text() }):up();
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13 end
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14
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15 function rss2atom.enclosure(atom_entry, tag)
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16 atom_entry:tag("link", { rel = "enclosure", href = tag.attr.url, type = tag.attr.type, length = tag.attr.length }):up();
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17 end
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19 function rss2atom.author(atom_entry, tag)
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20 atom_entry:tag("author")
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21 :tag("email"):text(tag:get_text()):up()
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22 :up();
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23 end
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25 function rss2atom.guid(atom_entry, tag)
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26 atom_entry:tag("id"):text(tag:get_text()):up();
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27 end
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29 function rss2atom.category(atom_entry, tag)
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30 atom_entry:tag("category", { term = tag:get_text(), scheme = tag.attr.domain }):up();
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31 end
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33 function rss2atom.description(atom_entry, tag)
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34 atom_entry:tag("summary"):text(tag:get_text()):up();
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35 end
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37 local months = {
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38 jan = "01", feb = "02", mar = "03", apr = "04", may = "05", jun = "06";
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39 jul = "07", aug = "08", sep = "09", oct = "10", nov = "11", dec = "12";
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40 };
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42 function rss2atom.pubDate(atom_entry, tag)
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43 local pubdate = tag:get_text():gsub("^%a+,", ""):gsub("^%s*", "");
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44 local date, month, year, hour, minute, second, zone =
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45 pubdate:match("^(%d%d?) (%a+) (%d+) (%d+):(%d+):?(%d*) ?(.*)$");
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46 if not date then return; end
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47 if #date == 1 then
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48 date = "0"..date;
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49 end
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50 month = months[month:sub(1,3):lower()];
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51 if #year == 2 then -- GAH!
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52 if tonumber(year) > 80 then
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53 year = "19"..year;
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54 else
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55 year = "20"..year;
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56 end
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57 end
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58 if zone == "UT" or zone == "GMT" then zone = "Z"; end
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59 if #second == 0 then
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60 second = "00";
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61 end
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62 local date_string = string.format("%s-%s-%sT%s:%s:%s%s", year, month, date, hour, minute, second, zone);
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63 atom_entry:tag("published"):text(date_string):up();
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64 end
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65
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66 -- Translate a single item to atom
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67 local function translate_rss(rss_feed)
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68 local feed = st.stanza("feed", { xmlns = "http://www.w3.org/2005/Atom" });
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69 local channel = rss_feed:get_child("channel");
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70 -- TODO channel properties
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71 for item in channel:childtags("item") do
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72 feed:tag("entry");
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73 for tag in item:childtags() do
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74 local translator = rss2atom[tag.name];
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75 if translator then
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76 translator(feed, tag);
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77 end
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78 end
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79 -- Preserve Atom-namespaced items
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80 for atomtag in item:childtags(nil, "http://www.w3.org/2005/Atom") do
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81 feed:add_child(st.clone(atomtag));
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82 end
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83 feed:reset();
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84 end
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85 return feed;
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86 end
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87
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88 return { translate_rss = translate_rss }