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williamc |
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#
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# User Interface --- very basic command line input interface
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#
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# Interface
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# ---------
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# new() : a new interface object
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# runquery(type, parameter,args) : Call the appropriate query handling
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# routine for the given type
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# startform() : Indicate a new form to start
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# endform(parameterstore) : Close a form and transfer parameters
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# (call setparam() on object)
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#
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# ------------------------------------------------------------
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# ---- required processing routines ---
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# freechoice( param , commentstring, optionref )
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# : display and ask user for input
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# strictchoice( param , commentstring, optionref )
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# : display and ask user for input
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# basic(param, commentstring) : Simply user input query
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package ActiveDoc::UserInterface_basic;
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require 5.001;
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sub new {
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my $class=shift;
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$self={};
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bless $self, $class;
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$self->init(@_); # override if reqd
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return $self;
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}
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sub init {
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my $self=shift;
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@{$self->{allowed_commands}}=qw(freechoice basic strictchoice);
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}
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sub runquery() {
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my $self=shift;
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my $type=shift;
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my $param=shift;
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my @args=@_;
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my $found='false';
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my $rv;
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foreach $command ( @{$self->{allowed_commands}} ) {
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if ( $command=~/^$type/ ) {
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$rv=$self->$command( $param, @args ); $found='true';
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last;
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}
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}
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if ( ! ( $found=~/true/ ) ) {
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# default to basic
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$rv=$self->basic( $param, @args );
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}
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$self->{paramhash}{$param}=$rv;
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}
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# --------------- Request Implementations -----------------------------
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#
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sub basic {
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my $self=shift;
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my $param=shift;
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my $string=shift;
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my @args=@_;
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$self->printout($string);
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return $self->prompt();
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}
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sub freechoice {
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my $self=shift;
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my $param=shift;
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my $string=shift;
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my $choiceref=shift;
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my $menuchoice;
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my $rv;
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$self->printout($string);
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my $num=1;
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foreach $item ( @{$choiceref} ) {
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$self->printout($num.". ".$item."\n");
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$num++;
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}
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$self->printout($num.". Enter Alternative Value\n");
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$self->printout("Please Enter a Number from the list above :");
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# Error check
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while ( (($menuchoice=$self->prompt()) > $num) || ( $menuchoice < 1) ) {
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$self->printout("Please Select a number Between 1 and $num :");
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}
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# Deal with alternative value
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if ( $menuchoice == $num ) {
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$rv=$self->basic($param,"Please enter new value\n");
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}
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else {
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$rv=$$choiceref[$menuchoice-1];
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$self->printout( $rv." selected\n");
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}
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return $rv;
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}
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sub strictchoice {
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my $self=shift;
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my $param=shift;
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my $string=shift;
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my $choiceref=shift;
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my $menuchoice;
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my $rv;
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$self->printout($string);
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my $num=0;
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foreach $item ( @{$choiceref} ) {
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$num++;
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$self->printout($num.". ".$item."\n");
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}
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$self->printout("Please Enter a Number from the list above :");
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# Error check
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while ( (($menuchoice=$self->prompt()) > $num) || ( $menuchoice < 1) ) {
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$self->printout("Please Select a number Between 1 and $num :");
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}
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$rv=$$choiceref[$menuchoice-1];
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$self->printout( $rv." selected\n");
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return $rv;
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}
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# ----------------- Support Routines ----------------------------------
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sub printout {
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my $self=shift;
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my $string=shift;
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print $string;
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}
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sub prompt {
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my $self=shift;
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my $input;
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$input = <STDIN>;
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chomp $input;
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return $input;
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}
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sub startform {
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my $self=shift;
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undef %$self->{paramhash};
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$self->printout("-----------------------------------------------------".
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"---------------\n");
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}
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sub endform {
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my $self=shift;
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my $parameterobject=shift;
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# copy the parameter hash across
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foreach $key ( %$paramhash ) {
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$parameterobject->setparam($key, $$self->{paramhash}{$key});
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}
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}
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