! Copyright (C) 2009 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: accessors alarms assocs calendar combinators
-continuations fry http.client io.streams.string kernel init
-namespaces prettyprint smtp arrays sequences math math.parser
-strings sets ;
+! See https://factorcode.org/license.txt for BSD license.
+USING: accessors calendar continuations db http.client init
+kernel math math.parser namespaces sequences site-watcher.db
+site-watcher.email timers ;
IN: site-watcher
-SYMBOL: sites
-
-SYMBOL: site-watcher-from
-
-sites [ H{ } clone ] initialize
+SYMBOL: site-watcher-frequency
+5 minutes site-watcher-frequency set-global
-TUPLE: watching emails url last-up up? send-email? error ;
+SYMBOL: running-site-watcher
+STARTUP-HOOK: [ f running-site-watcher set-global ]
<PRIVATE
-: ?1array ( array/object -- array )
- dup array? [ 1array ] unless ; inline
-
-: <watching> ( emails url -- watching )
- watching new
- swap >>url
- swap ?1array >>emails
- now >>last-up
- t >>up? ;
-
-ERROR: not-watching-site url status ;
-
-: set-site-flags ( watching new-up? -- watching )
- [ over up?>> = [ t >>send-email? ] unless ] keep >>up? ;
-
-: site-bad ( watching error -- )
- >>error f set-site-flags drop ;
-
-: site-good ( watching -- )
- f >>error
- t set-site-flags
- now >>last-up drop ;
-
-: check-sites ( assoc -- )
+: check-sites ( seq -- )
[
- swap '[ _ http-get 2drop site-good ] [ site-bad ] recover
- ] assoc-each ;
+ [ dup url>> http-get 2drop site-good ] [ site-bad ] recover
+ ] each ;
-: site-up-email ( email watching -- email )
- last-up>> now swap time- duration>minutes 60 /mod
+: site-up-email ( site -- body )
+ last-up>> ago duration>minutes 60 /mod
[ >integer number>string ] bi@
[ " hours, " append ] [ " minutes" append ] bi* append
- "Site was down for (at least): " prepend >>body ;
+ "Site was down for (at least): " prepend ;
-: ?unparse ( string/object -- string )
- dup string? [ unparse ] unless ; inline
+: site-down-email ( site -- body ) error>> ;
-: site-down-email ( email watching -- email )
- error>> ?unparse >>body ;
+: send-report ( site -- )
+ [ ]
+ [ dup up?>> [ site-up-email ] [ site-down-email ] if ]
+ [ [ url>> ] [ up?>> "up" "down" ? ] bi " is " glue ] tri
+ send-site-email ;
-: send-report ( watching -- )
- [ <email> ] dip
- {
- [ emails>> >>to ]
- [ drop site-watcher-from get "factor.site.watcher@gmail.com" or >>from ]
- [ dup up?>> [ site-up-email ] [ site-down-email ] if ]
- [ [ url>> ] [ up?>> "up" "down" ? ] bi " is " glue >>subject ]
- [ f >>send-email? drop ]
- } cleave send-email ;
-
-: report-sites ( assoc -- )
- [ nip send-email?>> ] assoc-filter
- [ nip send-report ] assoc-each ;
+: send-reports ( seq -- )
+ [ [ send-report ] each ] unless-empty ;
PRIVATE>
-SYMBOL: site-watcher-frequency
-site-watcher-frequency [ 5 minutes ] initialize
-
-: watch-sites ( assoc -- alarm )
- '[
- _ [ check-sites ] [ report-sites ] bi
- ] site-watcher-frequency get every ;
-
-: watch-site ( emails url -- )
- sites get ?at [
- [ [ ?1array ] dip append prune ] change-emails drop
- ] [
- <watching> dup url>> sites get set-at
- ] if ;
-
-: delete-site ( url -- )
- sites get delete-at ;
+: watch-sites ( -- )
+ find-sites check-sites sites-to-report send-reports ;
-: unwatch-site ( emails url -- )
- [ ?1array ] dip
- sites get ?at [
- [ diff ] change-emails dup emails>> empty? [
- url>> delete-site
- ] [
- drop
- ] if
- ] [
- nip delete-site
- ] if ;
-
-SYMBOL: running-site-watcher
-
-: run-site-watcher ( -- )
- running-site-watcher get-global [
- sites get-global watch-sites running-site-watcher set-global
+: run-site-watcher ( db -- )
+ [ running-site-watcher get ] dip '[
+ [ _ [ watch-sites ] with-db ] site-watcher-frequency get every
+ running-site-watcher set
] unless ;
-[ f running-site-watcher set-global ] "site-watcher" add-init-hook
-
-MAIN: run-site-watcher
+: stop-site-watcher ( -- )
+ running-site-watcher get [ stop-timer ] when* ;