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update rss reader to use tuple-db

chris.double 2006-08-29 14:16:13 +00:00
parent 96ce758240
commit 3e466ef322
2 changed files with 53 additions and 80 deletions
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11
contrib/rss/readme.txt
View File

@ -14,14 +14,9 @@ somewhere:
Replacing "libsqlite3.so" with the path to the sqlite shared library
or DLL. I put this in my ~/.factor-rc.
Before running the RSS reader web application you need to create the
history database in the same directory as the 'f' executable. Create
it with:
sqlite3 history.db
> create table rss (url text, title text, link text, primary key (url));
> create table entries (url text, link text, title text, description text, pubdate text, primary key(url, link));
> [eof]
The RSS reader web application creates a database file called
'rss-reader.db' in the same directory as the Factor executable when
first started. This database contains all the feed information.
To load the web application use:

122
contrib/rss/rss-reader.factor
View File

@ -9,20 +9,36 @@
! > [eof]
!
IN: rss
USING: kernel html cont-responder namespaces sequences io hashtables sqlite errors ;
USING: kernel html cont-responder namespaces sequences io hashtables sqlite errors tuple-db ;
SYMBOL: feeds
TUPLE: reader-feed url title link ;
TUPLE: reader-entry url link title description pubdate ;
: init-feeds ( -- )
V{ } clone feeds set-global ;
reader-feed default-mapping set-mapping
reader-entry default-mapping set-mapping
SYMBOL: db
: init-db ( -- )
db get-global [ sqlite-close ] when*
"rss-reader.db" exists? [
"rss-reader.db" sqlite-open db set-global
] [
"rss-reader.db" sqlite-open dup db set-global
dup reader-feed create-tuple-table
reader-entry create-tuple-table
] if ;
: add-feed ( url -- )
feeds get push ;
"" "" <reader-feed> db get swap insert-tuple ;
: remove-feed ( url -- )
feeds get remove feeds set-global ;
f f <reader-feed> db get swap find-tuples [ db get swap delete-tuple ] each ;
: get-feed ( -- url )
: all-urls ( -- urls )
f f f <reader-feed> db get swap find-tuples [ reader-feed-url ] map ;
: ask-for-url ( -- url )
[
<html>
<head> <title> "Enter a Feed URL" write </title> </head>
@ -36,27 +52,18 @@ SYMBOL: feeds
</html>
] show "url" swap hash ;
: get-entries ( url -- )
"history.db" sqlite-open ( db )
"select * from entries where url='" rot append "'" append dupd sqlite-prepare ( db stmt )
[ [ [ 2 column-text ] keep
[ 1 column-text ] keep
[ 3 column-text ] keep
4 column-text <rss-entry>
] sqlite-map
] keep
sqlite-finalize
swap sqlite-close ;
: get-entries ( url -- entries )
f f f f <reader-entry> db get swap find-tuples ;
: view-entries ( url -- )
: display-entries ( url -- )
[
<html>
<head> <title> "View entries for " write over write </title> </head>
<body>
swap get-entries [
<h2> dup rss-entry-title write </h2>
<h2> dup reader-entry-title write </h2>
<p>
rss-entry-description write
reader-entry-description write
</p>
] each
<p> <a =href a> "Back" write </a> </p>
@ -64,54 +71,28 @@ SYMBOL: feeds
</html>
] show 2drop ;
: rss-delete-statement ( url -- string )
[
"delete from rss where url='" % % "';" % ] "" make ;
: rss>reader-feed ( url rss -- reader-feed )
[ rss-title ] keep rss-link <reader-feed> ;
: rss-insert-statement ( url rss -- string )
[
"insert into rss values('" % swap % "','" %
[ rss-title "'" "''" rot replace % "','" % ] keep
rss-link % "');" %
] "" make ;
: rss-entry>reader-entry ( url entry -- reader-entry )
[ rss-entry-link ] keep
[ rss-entry-title ] keep
[ rss-entry-description ] keep
rss-entry-pub-date
<reader-entry> ;
: entry-delete-statement ( url entry -- string )
[
"delete from entries where url='" % swap % "' and link='" %
rss-entry-link "'" "''" rot replace % "';" %
] "" make ;
: entry-insert-statement ( url entry -- string )
[
"insert into entries values('" % swap % "','" %
[ rss-entry-link "'" "''" rot replace % "','" % ] keep
[ rss-entry-title "'" "''" rot replace % "','" % ] keep
[ rss-entry-description "'" "''" rot replace % "','" % ] keep
rss-entry-pub-date "'" "''" rot replace % "');" %
] "" make ;
: do-update ( string -- )
"history.db" sqlite-open ( db )
dup rot sqlite-prepare [ [ drop ] sqlite-each ] keep
sqlite-finalize
sqlite-close ;
: update-feed-database ( url rss -- )
over rss-delete-statement do-update
2dup rss-insert-statement do-update ( url rss - )
rss-entries [ ( url entry )
2dup entry-delete-statement do-update
entry-insert-statement do-update
: update-feed-database ( url -- )
dup remove-feed
dup rss-get
2dup rss>reader-feed db get swap save-tuple
rss-entries [
dupd rss-entry>reader-entry
dup >r reader-entry-link f f f <reader-entry> db get swap find-tuples [ db get swap delete-tuple ] each r>
db get swap save-tuple
] each-with ;
: update-feeds ( seq -- )
[
[
dup rss-get
] catch [
update-feed-database
] unless
] each
[ update-feed-database ] each
[
<html>
<head> <title> "Feeds Updated" write </title> </head>
@ -129,22 +110,19 @@ SYMBOL: feeds
<body>
<p>
<table "1" =border table>
feeds get [
all-urls [
<tr>
<td> dup write </td>
<td> dup [ remove-feed ] curry "Remove" swap quot-href </td>
<td> [ view-entries ] curry "Database" swap quot-href </td>
<td> [ display-entries ] curry "Database" swap quot-href </td>
</tr>
] each
</table>
</p>
<p> "Add Feed" [ get-feed add-feed ] quot-href </p>
<p> "Update Feeds" [ feeds get update-feeds ] quot-href </p>
<p> "Add Feed" [ ask-for-url add-feed ] quot-href </p>
<p> "Update Feeds" [ all-urls update-feeds ] quot-href </p>
</body>
</html>
] show-final ;
init-feeds
"maintain-feeds" [ maintain-feeds ] install-cont-responder
"maintain-feeds" [ init-db maintain-feeds ] install-cont-responder