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annotate mod_pubsub_feeds/feeds.lib.lua @ 4049:78f1de5301fc

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mod_adhoc_dataforms_demo: Fix duplicate field prevention It's supposed to only include each type of form field once per form at most but it didn't note which fields it had added already. No idea what the probability was anyways, probably pretty low.
author Kim Alvefur <zash@zash.se>
date Tue, 23 Jun 2020 19:40:55 +0200
parents 649f733aa3dc
children c402b273f2e3
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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
Kim Alvefur <zash@zash.se>
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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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10
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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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15 function rss2atom.author(atom_entry, tag)
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16 atom_entry:tag("author")
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17 :tag("email"):text(tag:get_text()):up()
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18 :up();
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19 end
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21 function rss2atom.guid(atom_entry, tag)
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22 atom_entry:tag("id"):text(tag:get_text()):up();
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23 end
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25 function rss2atom.category(atom_entry, tag)
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26 atom_entry:tag("category", { term = tag:get_text(), scheme = tag.attr.domain }):up();
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27 end
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29 function rss2atom.description(atom_entry, tag)
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30 atom_entry:tag("summary"):text(tag:get_text()):up();
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31 end
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32
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33 local months = {
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34 jan = "01", feb = "02", mar = "03", apr = "04", may = "05", jun = "06";
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35 jul = "07", aug = "08", sep = "09", oct = "10", nov = "11", dec = "12";
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36 };
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37
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38 function rss2atom.pubDate(atom_entry, tag)
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39 local pubdate = tag:get_text():gsub("^%a+,", ""):gsub("^%s*", "");
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40 local date, month, year, hour, minute, second, zone =
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41 pubdate:match("^(%d%d?) (%a+) (%d+) (%d+):(%d+):?(%d*) ?(.*)$");
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42 if not date then return; end
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43 if #date == 1 then
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44 date = "0"..date;
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45 end
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46 month = months[month:sub(1,3):lower()];
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47 if #year == 2 then -- GAH!
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48 if tonumber(year) > 80 then
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49 year = "19"..year;
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50 else
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51 year = "20"..year;
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52 end
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53 end
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54 if zone == "UT" or zone == "GMT" then zone = "Z"; end
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55 if #second == 0 then
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56 second = "00";
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57 end
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58 local date_string = string.format("%s-%s-%sT%s:%s:%s%s", year, month, date, hour, minute, second, zone);
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59 atom_entry:tag("published"):text(date_string):up();
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60 end
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61
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62 -- Translate a single item to atom
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63 local function translate_rss(rss_feed)
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64 local feed = st.stanza("feed", { xmlns = "http://www.w3.org/2005/Atom" });
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65 local channel = rss_feed:get_child("channel");
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66 -- TODO channel properties
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67 for item in channel:childtags("item") do
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68 feed:tag("entry");
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69 for tag in item:childtags() do
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70 local translator = rss2atom[tag.name];
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71 if translator then
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72 translator(feed, tag);
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73 end
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74 end
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75 feed:reset();
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76 end
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77 return feed;
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78 end
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79
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80 return { translate_rss = translate_rss }