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# # ## ### ##### ######## ############# ######################
## Verify DISCOVER credit card number
#
## Reference
## http://wiki.cdyne.com/wiki/index.php?title=Credit_Card_Verification
# # ## ### ##### ######## ############# ######################
# The code below implements the interface of a snit validation type,
# making it directly usable with snit's -type option in option
# specifications.
# # ## ### ##### ######## ############# ######################
## Requisites
package require Tcl 8.5
package require snit
package require valtype::luhn
package require valtype::common
namespace eval ::valtype::creditcard::discover {
namespace import ::valtype::common::*
}
# # ## ### ##### ######## ############# ######################
## Implementation
snit::type ::valtype::creditcard::discover {
#-------------------------------------------------------------------
# Type Methods
typemethod validate {value} {
if {[string length $value] != 16} {
badlength {CREDITCARD DISCOVER} 16 "CREDITCARD DISCOVER number"
} elseif {![string match 6011* $value] &&
![string match 65* $value]} {
badprefix {CREDITCARD DISCOVER} {6011 65} "CREDITCARD DISCOVER number"
}
return [valtype::luhn validate $value {CREDITCARD DISCOVER}]
}
typemethod checkdigit {value} {
if {[string length $value] != 15} {
badlength {CREDITCARD DISCOVER} 15 "CREDITCARD DISCOVER number without checkdigit"
} elseif {![string match 6011* $value] &&
![string match 65* $value]} {
badprefix {CREDITCARD DISCOVER} {6011 65} "CREDITCARD DISCOVER number without checkdigit"
}
return [valtype::luhn checkdigit $value {CREDITCARD DISCOVER}]
}
#-------------------------------------------------------------------
# Constructor
# None needed; no options
#-------------------------------------------------------------------
# Public Methods
method validate {value} {
$type validate $value
}
}
# # ## ### ##### ######## ############# ######################
## Ready
package provide valtype::creditcard::discover 1
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