/* --------------------------------------------------------------------- 
** Figure 13.24:  Password validation: comparing and copying strings.
** Figure 13.25:  The guys and their message.
** Figure 13.26:  Composing the love letter.
** --------------------------------------------------------------------- 
*/
#include "tools.h"

#define PASSW "LoveForEver" 
void compose( void );                                               

void main( void )
{   
    string no_go = " is not the password; No Entry! \n";
    const int k = strlen( no_go );
    char word[80 + k];          /* Buffer for the password and comment. */

    printf( "\n Please enter the password: " );
    scanf( "%79[^\n]", word );

    if (strequal( word, PASSW )) {
        puts( " Password is correct; go ahead\n" );             
        compose();    
    }
    else {
        strcat( word, no_go );   /* Join no_go to end of input word */
        printf( " %s\n", word );
    }   
}
    
/* ------------------------------------------------------------------
** Figure 13.25:  The guys and their message.
*/

#define N  4            /* Number of guys using this program */
#define MAXINSERT 15    /* Maximum length of name or petname */
/* ------------------------------------------------------------------
** Warning: every name must be no larger than MAXINSERT characters.  
*/
const string guys[N]  = {"Harold", "Jim", "Jerry", "Charles"}; 
const string girls[N] = {"Annie", "June", "Leila", "Desiree"}; 
const string petnames[N] = {"baby", "bug", "lover", "doll"};


#define L  8            /* Number of lines in message array */
#define MAXMESSAGE  80  /* Maximum length of line in message array */
/* ------------------------------------------------------------------
** Warning: every line must be no larger than MAXMESSAGE characters 
**          and any insertion must be at the end of the line.
*/
const string message[L] = { /* Insertions must be at end of line. */
        "\n\n ***",
        ",\n\n I need you!  ",
        "\n Every moment without my xxx", 
        " is empty!\n Let me back into your life, ***",
        "!  Talk to me!\n You will always be my ***",
        "-xxx",
        "!\n\n ",
        "-- @@@"
    };

#define KISSES "\n XOXOXOX\n "

/* --------------------------------------------------------------------- 
** Figure 13.26:  Composing the love letter.
*/
void compose( void )                                               
{   
    int k;              /* Line counter  */
    int who;
    string guy, girl, petname;

    char line[MAXMESSAGE + MAXINSERT];   

    puts( " Form Love Letter" );
    who = menu_i( " Who needs a letter?", N, guys );
    for (k = 0; k < L; ++k)  {
        strcpy (line, message[k]);

        guy = strstr( line, "@@@" );
        girl = strstr( line, "***" );
        petname = strstr( line, "xxx" );

        if (guy != NULL)  strcpy( guy, guys[who] );
        else if (girl != NULL)  strcpy( girl, girls[who] );
        else if (petname != NULL)  strcpy( petname, petnames[who] );
        else strcat( line, KISSES );

        printf( "%s", line );
    }
    puts( "\n" );
}