49 lines
2.4 KiB
Plaintext
49 lines
2.4 KiB
Plaintext
# WMSC feed generator
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# Expects pup JSON output holding <li> tags, outputs xmltodict-compatible JSON
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# WARNING: Dates are locale-sensitive; the RSS feed might not generate correctly with another locale.
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{
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"rss": {
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"@version": "2.0",
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"channel": {
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"title": "WMSC",
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"description": "Washington Metrorail Safety Commission safety reports",
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"link": "https://wmsc.gov/oversight/reports/",
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"language": "en-us",
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"pubDate": (now | strftime("%a, %d %b %Y %T %z")),
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"docs": "https://www.rssboard.org/rss-specification",
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"ttl": 1440,
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"generator": "ITSB",
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"item": (
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# The WMSC parsing is unusually complex due to the lack of structured data.
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# We need at least a title, a URL, and a date, the date being the harder part.
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# The original data is not sorted by the only date we have (there is an implicit unspecified publication date),
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# so we first compute a timestamp that we can use to sort items with. This helps with bad RSS reader implementations.
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[.[] | .timestamp = (
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.text
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# Dates are in the middle of the bullet contents, sometimes with their parts separated with punctuation, sometimes not:
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# 2019-02-31, 20190231, 2019_0231, 2019 02-31 etc.
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| match("[^[:alnum:]](?<year>[0-9]{4})[^[:alnum:]]?(?<month>(?:0[1-9]|1[0-2]))[^[:alnum:]]?(?<day>(?:[0-2][0-9]|3[01]))").captures
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# Turn the captured groups into a { group_name: matched_text } object
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| [ .[] | { "key": .name, "value": .string } ]
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| from_entries
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# Turn those matched dates back into parseable stuff
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| (.year + "-" + .month + "-" + .day)
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# Get an actual timestamp
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| strptime("%Y-%m-%d")
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| mktime
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)]
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# Sort by timestamp in descending order
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| sort_by(.timestamp)
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| reverse
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# Get the actual RSS item
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| [.[] | {
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"title": .text,
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"pubDate": (.timestamp | strftime("%a, %d %b %Y %T %z")),
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"link": (.children | map(select(.tag == "a")) | first | .href)
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}]
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)
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}
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}
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}
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