TODO

   1 - [ ] Convert to Typed Racket
   2   - requires: build executable (otherwise too slow)
   3 - [x] Build executable
   4   Implies fix of "collection not found" when executing the built executable
   5     outside the source directory:
   6
   7     collection-path: collection not found
   8       collection: "tt"
   9       in collection directories:
  10       context...:
  11        /usr/share/racket/collects/racket/private/collect.rkt:11:53: fail
  12        /usr/share/racket/collects/setup/getinfo.rkt:17:0: get-info
  13        /usr/share/racket/collects/racket/contract/private/arrow-val-first.rkt:555:3
  14        /usr/share/racket/collects/racket/cmdline.rkt:191:51
  15        '|#%mzc:p
  16
  17 - [ ] Support redirects
  18   - should permanent redirects update the feed somehow?
  19 - [ ] Support time ranges (i.e. reading the timeline between given time points)
  20 - [x] Implement rfc3339->epoch
  21 - [x] Remove dependency on rfc3339-old
  22 - [x] remove dependency on http-client
  23 - [ ] optional text wrap
  24 - [ ] write
  25 - [x] caching (use cache by default, unless explicitly asked for update)
  26   - [x] value --> cache
  27   - [x] value <-- cache
  28     requires: d command
  29 - [ ] timeline limits
  30 - [ ] feed set operations (perhaps better done externally?)
  31 - [ ] timeline as a result of a query (feed set op + filter expressions)
  32 - [ ] named timelines
  33 - [ ] config files
  34 - [ ] parse "following" from feed
  35   - following = <nick> <uri>
  36 - [ ] parse mentions:
  37   - @<source.nick source.url> | @<source.url>
  38 - [ ] highlight mentions
  39 - [ ] filter on mentions
  40 - [ ] highlight hashtags
  41 - [ ] filter on hashtags
  42 - [ ] hashtags as channels? initial hashtag special?
  43 - [ ] query language
  44 - [ ] console logger colors by level ('error)
  45 - [ ] file logger ('debug)
  46 - [-] commands:
  47   - [x] r | read
  48     - see timeline ops above
  49   - [ ] w | write
  50     - arg or stdin
  51     - nick expand to URI
  52   - [ ] q | query
  53     - see timeline ops above
  54     - see hashtag and channels above
  55   - [x] d | download
  56   - [x] u | upload
  57     - calls user-configured command to upload user's own feed file to their server
  58   Looks like a better CLI parser than "racket/cmdline": https://docs.racket-lang.org/natural-cli/
  59   But it is no longer necessary now that I've figured out how to chain (command-line ..) calls.
  60 - [ ] Suport immutable timelines
  61     - store individual messages (possibly in something like DBM or SQLite)