Validation script

[beh_gras_beh]

Dear people,

I'm having problems with a piece of script what I am trying to implement in a form field.

This is the code, only how can I apply this that the input is from the form field and the output automatically changes.

function encode( str, prepend )
{
    var result = [];
    if ( prepend ) {
        result.push( str.charAt( 0 ) );
    }
    result.push( encode.first( str ) );
    result.push( encode.second( str ) );
    return result.join( ' ' ).trim();
}
encode.table = {
    A: [ 0,   1,   2,   3,   4,   5,   6,   7,   8,   9 ],
    B: [';', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l'],
    C: ['p', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o']
}
encode.keys = [
    ['A', 'A', 'A', 'A', 'A', 'A'],
    ['A', 'A', 'B', 'A', 'B', 'B'],
    ['A', 'A', 'B', 'B', 'A', 'B'],
    ['A', 'A', 'B', 'B', 'B', 'A'],
    ['A', 'B', 'A', 'A', 'B', 'B'],
    ['A', 'B', 'B', 'A', 'A', 'B'],
    ['A', 'B', 'B', 'B', 'A', 'A'],
    ['A', 'B', 'A', 'B', 'A', 'B'],
    ['A', 'B', 'A', 'B', 'B', 'A'],
    ['A', 'B', 'B', 'A', 'B', 'A'],
];
encode.first = function ( str ) {
    var key = encode.keys[ +str.charAt( 0 ) ];
    return str
        .substring( 1, 7 )
        .split( '' )
        .map(function ( number, index ) {
            return encode.table[ key[ index ] ][ +number ];
        })
        .join( '' )
    ;
};
encode.second = function ( str ) {
    return str
        .substring( 7, 13 )
        .split( '' )
        .map(function ( number, index ) {
            return encode.table.C[ +number ];
        })
        .join( '' )
    ;
};
encode('2230154678901', true) // 2 23;a5f yuiopq  

[JR Boulay]

Hi.

What problems?

What this script is expected to do?

[beh_gras_beh]

I have created a font wich can be used to create an EAN-13 barcode which is a superset of the UPC-A barcode.

How to use

EAN-13 has 3 symbol sets A, B, and C. It looks like the following: *XXXXXX#CCCCCC*

* start/end bar (as common for Code 39)

# middle bar

X a symbol of set A or B (see below)

C a symbol of set C

Symbol sets

The symbol sets are placed on an international keyboard layout:

Number row: 1234567890

Middle character row: asdfghjkl;

Top character row: qwertyuiop

The first digit of an EAN-13 barcode does not directly correspond to a symbol. It determines which symbol set for the following 6 digits is to be used. The following listing shows the symbol set combinations for the starting digits:

AABABB

AABBAB

AABBBA

ABAABB

ABBAAB

ABBBAA

ABABAB

ABABBA

ABBABA

If the starting digit is 0, or if you want to encode a UPC-A, only use symbol set A.

Examples

The spaces are only inserted for clarity.

EAN number → symbol set → What you type with the font

2 012345 67890 3 → *AABBAB#CCCCCC* → *01sd4g#yuiope*

2 230154 67890 1 → *AABBAB#CCCCCC* → *23;a5f#yuiopq*

9 786789 12345 1 → *ABBABA#CCCCCC* → *7kh7k9#qwertq*

9 789876 12345 7 → *ABBABA#CCCCCC* → *7kl8j6#qwertu*

Only can I do this in a form field?

[beh_gras_beh · Accepted solution]

This works,

function encode( str, prepend )
{
    var result = [];
    if ( prepend ) {
        result.push( str.charAt( 0 ) );
    }
    result.push( encode.first( str ) );
    result.push( encode.second( str ) );
    return result.join( '' ).trim();
}
encode.table = {
    A: [ 0,   1,   2,   3,   4,   5,   6,   7,   8,   9 ],
    B: [';', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l'],
    C: ['p', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o']
}
encode.keys = [
    ['A', 'A', 'A', 'A', 'A', 'A'],
    ['A', 'A', 'B', 'A', 'B', 'B'],
    ['A', 'A', 'B', 'B', 'A', 'B'],
    ['A', 'A', 'B', 'B', 'B', 'A'],
    ['A', 'B', 'A', 'A', 'B', 'B'],
    ['A', 'B', 'B', 'A', 'A', 'B'],
    ['A', 'B', 'B', 'B', 'A', 'A'],
    ['A', 'B', 'A', 'B', 'A', 'B'],
    ['A', 'B', 'A', 'B', 'B', 'A'],
    ['A', 'B', 'B', 'A', 'B', 'A'],
];
encode.first = function ( str ) {
    var key = encode.keys[ +str.charAt( 0 ) ];
    return str
        .substring( 1, 7 )
        .split( '' )
        .map(function ( number, index ) {
            return encode.table[ key[ index ] ][ +number ];
        })
        .join( '' ) + '#'
    ;
};
encode.second = function ( str ) {
    return str
        .substring( 7, 13 )
        .split( '' )
        .map(function ( number, index ) {
            return encode.table.C[ +number ];
        })
        .join( '' )
    ;
};
event.value = "*" + encode(event.value, false) + "*";