549 lines
18 KiB
Scheme
549 lines
18 KiB
Scheme
(define-structure surflet surflet-interface
|
||
(open scheme-with-scsh
|
||
surflets
|
||
let-opt
|
||
receiving
|
||
define-record-types
|
||
(subset srfi-13 (string-downcase string-join))
|
||
(subset srfi-1 (find filter-map split-at remove))
|
||
sunet-utilities
|
||
surflet-requests)
|
||
(begin
|
||
|
||
;;; Spaceship components
|
||
;;; Size (Class ...)
|
||
;;; Arms (Photontorpedos, Phaser)
|
||
;;; Shields
|
||
;;; Drive (Impuls, Warp)
|
||
;;; Extras (Double Casing, Trans Warp Drive, etc.)
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; DATA
|
||
(define-record-type ship-data :ship-data
|
||
(make-ship-data class max-crew med-sections max-shuttles arm-types
|
||
max-arms max-shield extras build-time)
|
||
ship-data?
|
||
(class ship-data-class)
|
||
(max-crew ship-data-max-crew)
|
||
(med-sections ship-data-med-sections)
|
||
(max-shuttles ship-data-max-shuttles)
|
||
(arm-types ship-data-arm-types)
|
||
(max-arms ship-data-max-arms)
|
||
(max-shield ship-data-max-shield)
|
||
(extras ship-data-extras)
|
||
(build-time ship-data-build-time))
|
||
|
||
;;; This are the orderable ships with their data. The following
|
||
;;; procedures will refer to this list to get the data for a ship
|
||
;;; class.
|
||
(define ships
|
||
(map (lambda (data)
|
||
(apply make-ship-data data))
|
||
;; class-name max-crew med-sections max-shuttles
|
||
;; (possible) arm-types
|
||
;; max-arms (TW) max-shields (TJ)
|
||
;; extras
|
||
;; build-time (months)
|
||
'(("Constitution" 400 14 10
|
||
(7 torpedo2)
|
||
17000 729000
|
||
(double-casing tractor shuttle-ramp)
|
||
6)
|
||
("Excelsior" 570 14 #f
|
||
(8 7 torpedo2)
|
||
41000 2106000
|
||
(double-casing tractor transwarp)
|
||
7)
|
||
("Ambassador" 550 15 #f
|
||
(9 8 7 torpedo1)
|
||
62500 4298000
|
||
(double-casing tractor)
|
||
8)
|
||
("Galaxy" 760 17 25
|
||
(10 9 8 torpedo2 torpedo-M/AM)
|
||
61200 5400000
|
||
(double-casing tractor discus wide-angle-firing
|
||
transporter captains-yacht
|
||
life-maintenance)
|
||
10))
|
||
))
|
||
|
||
;;; All orderable classes extracted from ship data list.
|
||
(define classes (map ship-data-class ships))
|
||
|
||
;;; All orderable drives.
|
||
(define drives
|
||
'("Impuls" "Warp"))
|
||
|
||
;;; All orderable arm types.
|
||
(define arm-types
|
||
'((7 . "Phaser Type VII") (8 . "Phaser Type VIII")
|
||
(9 . "Phaser Type IX") (10 . "Phaser Type X")
|
||
(torpedo1 . "Class 1 Torpedo")
|
||
(torpedo2 . "Photon-Torpedo-System Class 2")
|
||
(torpedo-M/AM . "Photonen-Torpedo-System M/AM")))
|
||
|
||
;;; All orderable extras. The ship data contains a list of extras a
|
||
;;; ship class may have.
|
||
(define extras
|
||
'((double-casing . "Double Casing")
|
||
(tractor . "Tractor Ray")
|
||
(shuttle-ramp . "Shuttle Ramp")
|
||
(transwarp . "Trans Warp Drive (experimental)")
|
||
(discus . "Detachable Discus Section")
|
||
(wide-angle-firing . "300<30> Fire Angle")
|
||
(transporter . "Extra Transporters (+35)")
|
||
(captains-yacht . "Captain's Yacht")
|
||
(life-maintenance . "Extended Life Maintenance System (ELMS)")
|
||
))
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Calculation
|
||
|
||
;;; Main entry point. Shows a welcome message, and invites to order a
|
||
;;; spaceship.
|
||
(define (main req . update-text+class+armed?+shields?+drive)
|
||
(let-optionals update-text+class+armed?+shields?+drive
|
||
((update-text #f)
|
||
(def-class #f)
|
||
(def-armed? #f)
|
||
(def-shields? #f)
|
||
(def-drive #f))
|
||
(let* ((class-radios (make-radio-input-fields
|
||
(checked-radio classes def-class)))
|
||
(drive-radios (make-radio-input-fields
|
||
(checked-radio drives def-drive)))
|
||
(armed-checkbox (make-checkbox-input-field def-armed?))
|
||
(shield-checkbox (make-checkbox-input-field def-shields?))
|
||
(req (send-html/suspend
|
||
(lambda (new-url)
|
||
(generate-main-page new-url update-text
|
||
class-radios drive-radios
|
||
armed-checkbox shield-checkbox))))
|
||
(bindings (get-bindings req))
|
||
(class (input-field-value (car class-radios) bindings))
|
||
(armed? (input-field-value armed-checkbox bindings))
|
||
(shields? (input-field-value shield-checkbox bindings))
|
||
(drive (input-field-value (car drive-radios) bindings)))
|
||
(cond
|
||
((not class)
|
||
(main req "Please specifiy a class." class armed? shields? drive))
|
||
((not drive)
|
||
(main req "Please specifiy a drive." class armed? shields? drive))
|
||
(else
|
||
(specify-components req #f class armed? shields? drive))))))
|
||
|
||
;;; Step 2ff: Let the customer specify the crew size, the arming, the
|
||
;;; shields and the extras, showing a result page at the end.
|
||
(define (specify-components req update-text class armed? shields? drive)
|
||
(receive (size med-beds)
|
||
(get-size req class)
|
||
(receive (weapons energy shield)
|
||
(get-armed+shields req class armed? shields?)
|
||
(order-page req
|
||
class
|
||
weapons energy
|
||
shield
|
||
drive
|
||
size
|
||
med-beds
|
||
(get-extras req class)))))
|
||
|
||
;;; Ask the customer about details for the arming and the shield of
|
||
;;; his spaceship. The selectable components are taken from the ship
|
||
;;; data list.
|
||
(define (get-armed+shields req class armed? shields? .
|
||
maybe-update-text+weapons+energy+shield)
|
||
(let-optionals maybe-update-text+weapons+energy+shield
|
||
((update-text #f)
|
||
(def-weapons #f)
|
||
(def-energy #f)
|
||
(def-shield #f))
|
||
(let* ((checkboxes+text
|
||
(and armed?
|
||
(map (lambda (type)
|
||
(let ((text (cdr (assoc type arm-types))))
|
||
(cons (make-annotated-checkbox-input-field
|
||
text
|
||
(and def-weapons (member? text def-weapons)))
|
||
text)))
|
||
(ship-data-arm-types (ship-ref class)))))
|
||
(energy-input (and armed?
|
||
(if def-energy
|
||
(make-number-input-field def-energy)
|
||
(make-number-input-field))))
|
||
(shield-input (and shields?
|
||
(if def-shield
|
||
(make-number-input-field def-shield)
|
||
(make-number-input-field))))
|
||
(req (send-html/suspend
|
||
(lambda (new-url)
|
||
(generate-armed+shield-page new-url update-text
|
||
checkboxes+text energy-input
|
||
shield-input))))
|
||
(bindings (get-bindings req))
|
||
(weapons (and armed?
|
||
(filter-map (lambda (checkbox+text)
|
||
(input-field-value (car checkbox+text) bindings))
|
||
checkboxes+text)))
|
||
(energy (and armed?
|
||
(input-field-value energy-input bindings)))
|
||
(shield (and shields?
|
||
(input-field-value shield-input bindings)))
|
||
(complains
|
||
(remove not
|
||
(list
|
||
(and armed?
|
||
(null? weapons)
|
||
need-weapons)
|
||
(and armed?
|
||
(check-bounded-number-field class energy positive-energy
|
||
ship-data-max-arms
|
||
arms-boundary))
|
||
(and shields?
|
||
(check-bounded-number-field class shield positive-shield
|
||
ship-data-max-shield
|
||
shield-boundary))))))
|
||
(if (null? complains)
|
||
(values weapons energy shield)
|
||
(get-armed+shields req class armed? shields?
|
||
`(p ,@(map (lambda (complain) `(,complain (br)))
|
||
complains))
|
||
weapons energy shield)))))
|
||
|
||
;;; Ask the customer about extras he want for his ship. The selectable
|
||
;;; items are taken from the ship data list.
|
||
(define (get-extras req class)
|
||
(let* ((checkboxes+text (map (lambda (extra)
|
||
(cons (make-annotated-checkbox-input-field extra)
|
||
(cdr (assoc extra extras))))
|
||
(ship-data-extras (ship-ref class))))
|
||
(req (send-html/suspend
|
||
(lambda (new-url)
|
||
(generate-extras-page new-url class checkboxes+text))))
|
||
(bindings (get-bindings req)))
|
||
(filter-map (lambda (checkbox+text)
|
||
(and (input-field-value (car checkbox+text) bindings)
|
||
(cdr checkbox+text)))
|
||
checkboxes+text)))
|
||
|
||
;;; Show the selected components of the customers ship and ask him for
|
||
;;; ordering the whole thing (without telling him, how long this will
|
||
;;; take, of course ;-) )
|
||
(define (order-page req class weapons arms-energy shield-energy drive
|
||
size med-beds extras)
|
||
(send-html/suspend
|
||
(lambda (new-url)
|
||
(generate-order-page new-url class weapons arms-energy
|
||
shield-energy drive size med-beds
|
||
extras)))
|
||
(send-html/finish
|
||
(generate-finish-page (calculate-build-time class weapons arms-energy
|
||
shield-energy drive size
|
||
extras)
|
||
req)))
|
||
|
||
;;; This returns the number of months that are probably necessary to
|
||
;;; build the ship. The data are taken from experience of the last
|
||
;;; five years :-)
|
||
(define (calculate-build-time class weapons arms-energy shield-energy
|
||
drive size extras)
|
||
(+ (ship-data-build-time (ship-ref class))
|
||
(if weapons
|
||
(+ (length weapons)
|
||
(if (> arms-energy 40000) 2 1))
|
||
0)
|
||
(if shield-energy
|
||
(if (> shield-energy 2200000)
|
||
3
|
||
2)
|
||
0)
|
||
4 ; for impulse drive
|
||
(if (string=? drive "Warp") 2 0) ; extra for warp drive
|
||
(if (> size 300) 3 2) ; This includes the med-beds.
|
||
(length extras)
|
||
))
|
||
|
||
;;; This asks the customer to specify how many crew members his ship
|
||
;;; will have. We only check that there is at least one crew member
|
||
;;; and the maximum crew member for a class is not exceeded.
|
||
(define (get-size req class . maybe-update-text)
|
||
(let* ((update-text (:optional maybe-update-text #f))
|
||
(size-input (make-number-input-field))
|
||
(req (send-html/suspend
|
||
(lambda (new-url)
|
||
(generate-size-page new-url update-text
|
||
class size-input))))
|
||
(bindings (get-bindings req))
|
||
(size (input-field-value size-input bindings)))
|
||
(if (or (not size)
|
||
(<= size 0))
|
||
(get-size req class positive-size)
|
||
(let* ((ship (ship-ref class))
|
||
(max-size (ship-data-max-crew ship) ))
|
||
(if (<= size max-size)
|
||
(values size (ship-data-med-sections ship))
|
||
(get-size req class (complain-size class max-size)))))))
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Page and text generating
|
||
|
||
;;; Title of each HTML page.
|
||
(define (make-title)
|
||
'(title "Spaceship Builder"))
|
||
|
||
;;; The following procedure do the actual HTML composing for the
|
||
;;; different steps. Nothing exciting here.
|
||
|
||
;;; Main page HTML.
|
||
(define (generate-main-page new-url update-text
|
||
class-radios drive-radios
|
||
armed-checkbox shield-checkbox)
|
||
`(html
|
||
,(make-title)
|
||
(body
|
||
(h1 "Welcome to the Spaceship Builder Web Site!")
|
||
(p "Here you can build your own space ship.")
|
||
(h2 "Step 1 -- Selecting components")
|
||
,(and update-text `(font (@ (color "red")) ,update-text))
|
||
(surflet-form ,new-url
|
||
GET
|
||
(table
|
||
(tr (@ (valign "top"))
|
||
(td "My spaceship is of class")
|
||
(td (table ,@(table-radios class-radios classes))))
|
||
(tr (td (table (tr (td ,armed-checkbox) (td "My spaceship is armed.")))))
|
||
(tr (td (table (tr (td ,shield-checkbox) (td "My spaceship has shields.")))))
|
||
(tr (@ (valign "top"))
|
||
(td "My spaceship's drive is ")
|
||
(td (table ,@(table-radios drive-radios drives))))
|
||
(tr))
|
||
,(make-submit-button "Submit choices"))
|
||
,(return-links main-return-link))))
|
||
|
||
;;; Size page HTML.
|
||
(define (generate-size-page new-url update-text class size-input)
|
||
`(html
|
||
,(make-title)
|
||
(body
|
||
(h2 "Step 2 -- Specify crew size")
|
||
(p "Please specify how many crew members your ship of class " ,class "
|
||
will have. The builder will add as many treatment beds and accomodations as necessary to
|
||
fullfill UFP Spaceship Crew's Rights Act 023/1000285.0/AB")
|
||
,(print-update update-text)
|
||
(surflet-form ,new-url
|
||
GET
|
||
(table
|
||
(tr (td "My ship is for a crew of ")
|
||
(td ,size-input)
|
||
(td "people"))
|
||
(tr (td ,(make-submit-button)))))
|
||
,(return-links first-page-return-link main-return-link))))
|
||
|
||
;;; Text displayed if crew size is too big for the spaceship's class.
|
||
(define (complain-size class size)
|
||
(format #f "Spaceships of the ~a class can only have
|
||
up to ~a crew members. Please adjust the selected size or choose another
|
||
spaceship class" class size))
|
||
|
||
;;; Text displayed if size is not positive.
|
||
(define positive-size
|
||
"According to UFP Spaceship Crew Consistence Act
|
||
025/100030.2/BX there must be at least one person on each spaceship. Thus, please
|
||
specify a positive number.")
|
||
|
||
;;; HTML page generator for Step 3 and 4: Arming and shields.
|
||
;;; Shows the possible arming for selection and asks about the amount
|
||
;;; of energy for arming and shields.
|
||
(define (generate-armed+shield-page new-url update-text
|
||
checkboxes+text energy-input
|
||
shield-input)
|
||
`(html
|
||
,(make-title)
|
||
(body
|
||
(surflet-form ,new-url
|
||
GET
|
||
,(if (and checkboxes+text energy-input)
|
||
`((h2 "Step 3 -- Specify arming")
|
||
(p "Please select one or more arm types for your ship and amount of energy you want to spent for it or them, respectively.")
|
||
,(print-update update-text)
|
||
(p
|
||
(table ,@(map (lambda (checkbox+text)
|
||
`(tr (td ,(car checkbox+text))
|
||
(td ,(cdr checkbox+text))))
|
||
checkboxes+text)))
|
||
(p
|
||
(table (tr (td "Use") (td ,energy-input) (td "TW for weapons.")))))
|
||
'(h2 "Step 3 -- Done: No Arming"))
|
||
,(if shield-input
|
||
`((h2 "Step 4 -- Specify shields")
|
||
(p "Please specify the amount of energy you want to spent for your shields:")
|
||
(table (tr (td ,shield-input) (td "TJ"))))
|
||
'(h2 "Step 4 -- Done: No shields"))
|
||
,(make-submit-button "OK"))
|
||
,(return-links first-page-return-link main-return-link))))
|
||
|
||
;;; Text displayed, if arms' energy is not positive.
|
||
(define positive-energy
|
||
"Please specify a positive number for the amount of arms energy.")
|
||
|
||
;;; Text displayed if shield's energy is not positive.
|
||
(define positive-shield
|
||
"Please specify a positive number for the amount of shield energy.")
|
||
|
||
;;; Text displayed if no weapons are selected, though the customer
|
||
;;; wished to have an armed spaceship.
|
||
(define need-weapons
|
||
"Please specify at least one weapon or turn back to main selection page and deselect arming.")
|
||
|
||
;;; Text displayed if arms' energy is too high for the spaceship class.
|
||
(define (arms-boundary class max-energy)
|
||
(format #f "Spaceships of class ~a cannot spend more than ~a TW for their arming."
|
||
class max-energy))
|
||
|
||
;;; Text displayed if shield's energy is too high for the spaceship class.
|
||
(define (shield-boundary class max-shield)
|
||
(format #f "Spaceships of class ~a cannot spend more than ~a TJ for their shields."
|
||
class max-shield))
|
||
|
||
;;; HTML page generator for the summary (order) page.
|
||
;;; Shows alle the details chosen for construction.
|
||
(define (generate-order-page new-url class weapons arms-energy
|
||
shield-energy drive size med-beds extras)
|
||
`(html ,(make-title)
|
||
(body
|
||
(h2 "Ordering")
|
||
(p "This are the data of your spaceship:")
|
||
(ul
|
||
(li "Class \"" ,class "\"")
|
||
(li ,size " crew members")
|
||
(li ,med-beds " treatment beds")
|
||
(li ,(if weapons
|
||
(format #f "Armed with ~a, powered with ~a TW"
|
||
(text-enumerate weapons) arms-energy)
|
||
"No arms"))
|
||
(li ,(if shield-energy
|
||
(format #f "~a TJ of shield energy" shield-energy)
|
||
"No shields"))
|
||
(li ,drive " drive")
|
||
,@(map (lambda (extra-text)
|
||
`(li ,extra-text))
|
||
extras))
|
||
(surflet-form ,new-url
|
||
POST
|
||
,(make-submit-button "Order now"))
|
||
,(return-links first-page-return-link main-return-link))))
|
||
|
||
;;; HTML page generator for the extras page.
|
||
;;; Shows a list of possible extras of this spaceship class for selection.
|
||
(define (generate-extras-page new-url class checkboxes+text)
|
||
`(html
|
||
,(make-title)
|
||
(body
|
||
(h2 "Step 5 -- Extras")
|
||
(p "Select one or more extras that are available for
|
||
spaceships of class " ,class ":")
|
||
(surflet-form ,new-url
|
||
GET
|
||
(table ,@(map (lambda (checkbox+text)
|
||
`(tr (td ,(car checkbox+text))
|
||
(td ,(cdr checkbox+text))))
|
||
checkboxes+text))
|
||
,(make-submit-button "OK"))
|
||
,(return-links first-page-return-link main-return-link))))
|
||
|
||
;;; HTML page generator.
|
||
;;; Shows the final page with a "Thank you" and an estimate for the
|
||
;;; construction time. Furthermore, it shows the customers host-name
|
||
;;; or its IP-adress.
|
||
(define (generate-finish-page months req)
|
||
`(html ,(make-title)
|
||
(body (h2 "Ordered")
|
||
(p "Thank you for your ordering.")
|
||
(p "Your order has been registered. "
|
||
"We will contact you ("
|
||
,(host-name-or-ip (socket-remote-address
|
||
(surflet-request-socket req)))
|
||
") as soon as the ship is built.")
|
||
(p "This will take about " ,months " months.")
|
||
,(return-links first-page-return-link main-return-link))))
|
||
|
||
(define main-return-link
|
||
'(url "/" "Return to main menu."))
|
||
|
||
(define (previous-page-return-link prev)
|
||
`(url ,prev "Return to previous page."))
|
||
|
||
(define first-page-return-link
|
||
'(url "/surflet/spaceship.scm" "Return to spaceship builder entry page."))
|
||
|
||
(define (return-links . links)
|
||
`(p
|
||
(hr)
|
||
,@(map (lambda (link) (list link '(br)))
|
||
links)))
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Helping functions
|
||
|
||
;;; Creates HTML-table rows, putting a radio in front of a text.
|
||
(define (table-radios radios texts)
|
||
(map (lambda (radio text)
|
||
`(tr (td ,radio) (td ,text)))
|
||
radios texts))
|
||
|
||
;;; Adds the 'checked attribute to a radio button, if its value
|
||
;;; (stored in LIST) equals to CHECK-THIS. With this, the selected
|
||
;;; value of a radio list can be restored if the page is redisplayed.
|
||
(define (checked-radio list check-this)
|
||
(map (lambda (elem)
|
||
(if (equal? elem check-this)
|
||
(cons elem `(@ (checked)))
|
||
elem))
|
||
list))
|
||
|
||
;;; Returns the ship-data structure for the class of name NAME.
|
||
(define (ship-ref name)
|
||
(find (lambda (ship) (string=? (ship-data-class ship) name))
|
||
ships))
|
||
|
||
;;; "Prints" UPDATE-TEXT in red color, i.e. in an HTML paragraph
|
||
;;; block.
|
||
(define (print-update update-text)
|
||
`(p ,(and update-text `(font (@ (color "red")) ,update-text))))
|
||
|
||
;;; Same as R5RS member, except that it returns either #t or #f.
|
||
(define (member? thing list)
|
||
(if (member thing list) #t #f))
|
||
|
||
;;; Makes an enumeration of the strings in TEXT-LIST:
|
||
;;; (text-enumerate '("John", "Bill", "Juliet")
|
||
;;; => "John, Bill and Juliet"
|
||
;;; with reasonable results if the list's length is smaller than 2.
|
||
(define (text-enumerate text-list)
|
||
(let ((len (length text-list)))
|
||
(case len
|
||
((0) "")
|
||
((1) (car text-list))
|
||
((2) (string-append (car text-list) " and " (cadr text-list)))
|
||
(else
|
||
(receive (head last)
|
||
(split-at text-list (- len 1))
|
||
(string-append (string-join head ", ")
|
||
" and "
|
||
(car last)))))))
|
||
|
||
;;; Does a check on the value of a number-input-field. Abstraction
|
||
;;; over two cases occured above. Best explained by the use above.
|
||
(define (check-bounded-number-field class input positiv selector boundary)
|
||
(if (or (not input)
|
||
(<= input 0))
|
||
positiv
|
||
(let ((max (selector (ship-ref class))))
|
||
(if (<= input max)
|
||
#f
|
||
(boundary class max)))))
|
||
|
||
))
|
||
|