--- /dev/null
+! cont-number-guess
+!
+! Copyright (C) 2004 Chris Double.
+!
+! Redistribution and use in source and binary forms, with or without
+! modification, are permitted provided that the following conditions are met:
+!
+! 1. Redistributions of source code must retain the above copyright notice,
+! this list of conditions and the following disclaimer.
+!
+! 2. Redistributions in binary form must reproduce the above copyright notice,
+! this list of conditions and the following disclaimer in the documentation
+! and/or other materials provided with the distribution.
+!
+! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+!
+! This example modifies the console based 'numbers-game' example
+! in a very minimal way to demonstrate conversion of a console
+! program to a web based application.
+!
+! All that was required was changing the input and output functions
+! to use HTML. The remaining code was untouched.
+!
+! The result is not that pretty but it shows the basic idea.
+USING: kernel math parser html html.elements io namespaces
+math.parser random webapps.continuation ;
+
+IN: webapps.numbers
+
+: web-print ( str -- )
+ ! Display the string in a web page.
+ [
+ swap dup
+ "<!DOCTYPE html>" print
+ <html>
+ <head> <title> write </title> </head>
+ <body>
+ <p> write </p>
+ <p> <a =href a> "Press to continue" write </a> </p>
+ </body>
+ </html>
+ ] show 2drop ;
+
+: read-number ( -- )
+ [
+ "<!DOCTYPE html>" print
+ <html>
+ <head> <title> "Enter a number" write </title> </head>
+ <body>
+ <form =action "post" =method form>
+ <p>
+ "Enter a number:" write
+ <input "text" =type "num" =name "20" =size input/>
+ <input "submit" =type "Press to continue" =value input/>
+ </p>
+ </form>
+ </body>
+ </html>
+ ] show [ "num" get ] bind string>number ;
+
+: guess-banner
+ "I'm thinking of a number between 0 and 100." web-print ;
+: guess-prompt ;
+: too-high "Too high" web-print ;
+: too-low "Too low" web-print ;
+: correct "Correct - you win!" web-print ;
+: inexact-guess ( actual guess -- )
+ < [ too-high ] [ too-low ] if ;
+
+: judge-guess ( actual guess -- ? )
+ 2dup = [
+ 2drop correct f
+ ] [
+ inexact-guess t
+ ] if ;
+
+: number-to-guess ( -- n ) 100 random ;
+
+: numbers-game-loop ( actual -- )
+ dup guess-prompt read-number judge-guess [
+ numbers-game-loop
+ ] [
+ drop
+ ] if ;
+
+: numbers-game number-to-guess numbers-game-loop ;
+
+"numbers-game" [ numbers-game ] install-cont-responder
projects / factor-unmaintained.git / blobdiff