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d2da9ddaec
emailler/apps/email.c
Bobbi Webber-Manners d2da9ddaec Initial support for MIME decoding of quoted-printable
2020-07-01 17:01:54 -04:00

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/////////////////////////////////////////////////////////////////
// emai//er - Simple Email User Agent vaguely inspired by Elm
// Handles INBOX in the format created by POP65
// Bobbi June 2020
/////////////////////////////////////////////////////////////////
// - TODO: Default to starting at end, not beginning (or option to sort backwards...)
// - TODO: Fix terrible scrollback algorithm!!
// - TODO: Editor for email composition functions
// - TODO: Add MIME support? Quoted-printable and Base64?
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <unistd.h>
#include <conio.h>
#include <string.h>
#include <ctype.h>
#include <apple2_filetype.h>
#define EMAIL_C
#include "email_common.h"
// Program constants
#define MSGS_PER_PAGE 18 // Number of messages shown on summary screen
#define MENU_ROW 22 // Row that the menu appears on
#define PROMPT_ROW 24 // Row that data entry prompt appears on
#define SCROLLBACK 25*80 // How many bytes to go back when paging up
#define READSZ 1024 // Size of buffer for copying files
// Characters
#define BELL 0x07
#define BACKSPACE 0x08
#define INVERSE 0x0f
#define DOWNARROW 0x0a
#define UPARROW 0x0b
#define RETURN 0x0d
#define NORMAL 0x0e
#define CURDOWN 0x0a
#define HOME 0x19
#define CLRLINE 0x1a
#define DELETE 0x7f
// Addresses
#define CURSORROW 0x0025
#define SYSTEMTIME 0xbf90
/*
* Represents a date and time
*/
struct datetime {
unsigned int year;
unsigned char month;
unsigned char day;
unsigned char hour;
unsigned char minute;
unsigned char ispd25format;
unsigned char nodatetime;
};
char filename[80];
char userentry[80];
char linebuf[998+2]; // According to RFC2822 Section 2.1.1 (998+CRLF)
FILE *fp;
struct emailhdrs *headers;
uint16_t selection, prevselection;
uint16_t num_msgs; // Num of msgs shown in current page
uint16_t total_msgs; // Total number of message in mailbox
uint16_t total_new; // Total number of new messages
uint16_t total_tag; // Total number of tagged messages
uint16_t first_msg; // Msg numr: first message current page
char curr_mbox[80] = "INBOX";
static unsigned char buf[READSZ];
#define ERR_NONFATAL 0
#define ERR_FATAL 1
/*
* Put cursor at beginning of PROMPT_ROW
*/
void goto_prompt_row(void) {
uint8_t i;
putchar(HOME);
for (i = 0; i < PROMPT_ROW - 1; ++i)
putchar(CURDOWN);
}
/*
* Show non fatal error in PROMPT_ROW
* Fatal errors are shown on a blank screen
*/
void error(uint8_t fatal, const char *fmt, ...) {
va_list v;
if (fatal) {
clrscr();
printf("\n\n%cFATAL ERROR:%c\n\n", INVERSE, NORMAL);
va_start(v, fmt);
vprintf(fmt, v);
va_end(v);
printf("\n\n\n\n[Press Any Key To Quit]");
cgetc();
exit(1);
} else {
goto_prompt_row();
putchar(CLRLINE);
va_start(v, fmt);
vprintf(fmt, v);
va_end(v);
printf(" - [Press Any Key]");
cgetc();
putchar(CLRLINE);
}
}
/*
* Busy spinner
*/
void spinner(void) {
static char chars[] = "|/-\\";
static uint8_t i = 0;
putchar(BACKSPACE);
putchar(chars[(i++) % 4]);
}
/*
* Read parms from POP65.CFG
*/
void readconfigfile(void) {
fp = fopen("POP65.CFG", "r");
if (!fp)
error(ERR_FATAL, "Can't open config file POP65.CFG");
fscanf(fp, "%s", cfg_server);
fscanf(fp, "%s", cfg_user);
fscanf(fp, "%s", cfg_pass);
fscanf(fp, "%s", cfg_pop_delete);
fscanf(fp, "%s", cfg_smtp_server);
fscanf(fp, "%s", cfg_smtp_domain);
fscanf(fp, "%s", cfg_emaildir);
fscanf(fp, "%s", cfg_emailaddr);
fclose(fp);
}
void readdatetime(unsigned char time[4], struct datetime *dt) {
unsigned int d = time[0] + 256U * time[1];
unsigned int t = time[2] + 256U * time[3];
if ((d == 0) && (t == 0)) {
dt->nodatetime = 1;
return;
}
dt->nodatetime = 0;
if (!(t & 0xe000)) {
/* ProDOS 1.0 to 2.4.2 date format */
dt->year = (d & 0xfe00) >> 9;
dt->month = (d & 0x01e0) >> 5;
dt->day = d & 0x001f;
dt->hour = (t & 0x1f00) >> 8;
dt->minute = t & 0x003f;
dt->ispd25format = 0;
if (dt->year < 40) /* See ProDOS-8 Tech Note 48 */
dt->year += 2000;
else
dt->year += 1900;
} else {
/* ProDOS 2.5.0+ */
dt->year = t & 0x0fff;
dt->month = ((t & 0xf000) >> 12) - 1;
dt->day = (d & 0xf800) >> 11;
dt->hour = (d & 0x07c0) >> 6;
dt->minute = d & 0x003f;
dt->ispd25format = 1;
}
}
/*
* Print a date/time value in short format for the status bar
*/
void printdatetime(struct datetime *dt) {
if (dt->nodatetime)
fputs("????-??-?? ??:??", stdout);
else {
printf("%04d-%02d-%02d %02d:%02d",
dt->year, dt->month, dt->day, dt->hour, dt->minute);
}
}
/*
* Format a date/time in format suitable for an email
* dt - structure representing date/time
* s - result is returned through this pointer
*/
void datetimelong(struct datetime *dt, char *s) {
static char *months[] = {"", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
if (dt->nodatetime)
sprintf(s, "No system clock");
else {
// eg: "20 Jun 2020 hh:mm:00"
sprintf(s, "%2d %s %04d %02d:%02d:00",
dt->day, months[dt->month], dt->year, dt->hour, dt->minute);
}
}
/*
* Obtain the system date and time for the status bar
*/
void printsystemdate(void) {
struct datetime dt;
readdatetime((unsigned char*)(SYSTEMTIME), &dt);
printdatetime(&dt);
}
/*
* Free linked list rooted at headers
*/
void free_headers_list(void) {
struct emailhdrs *h = headers;
while (h) {
free(h);
h = h->next; // Not strictly legal, but will work
}
headers = NULL;
}
/*
* Read EMAIL.DB and populate linked list rooted at headers
* startnum - number of the first message to load (1 is the first)
* initialize - if 1, then total_new and total_msgs are calculated
* switchmbox - if 1, then errors are treated as non-fatal (for S)witch command)
* Returns 0 if okay, 1 on non-fatal error.
*/
uint8_t read_email_db(uint16_t startnum, uint8_t initialize, uint8_t switchmbox) {
struct emailhdrs *curr = NULL, *prev = NULL;
uint16_t count = 0;
uint16_t l;
if (initialize) {
total_new = total_msgs = total_tag = 0;
}
free_headers_list();
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, curr_mbox);
fp = fopen(filename, "rb");
if (!fp) {
error(switchmbox ? ERR_NONFATAL : ERR_FATAL, "Can't open %s", filename);
if (switchmbox)
return 1;
}
if (fseek(fp, (startnum - 1) * EMAILHDRS_SZ_ON_DISK, SEEK_SET)) {
error(switchmbox ? ERR_NONFATAL : ERR_FATAL, "Can't seek in %s", filename);
if (switchmbox)
return 1;
}
num_msgs = 0;
while (1) {
curr = (struct emailhdrs*)malloc(sizeof(struct emailhdrs));
if (!curr)
error(ERR_FATAL, "Can't malloc()");
curr->next = NULL;
curr->tag = ' ';
l = fread(curr, 1, EMAILHDRS_SZ_ON_DISK, fp);
++count;
if (l != EMAILHDRS_SZ_ON_DISK) {
free(curr);
fclose(fp);
return 0;
}
if (count <= MSGS_PER_PAGE) {
if (!prev)
headers = curr;
else
prev->next = curr;
prev = curr;
++num_msgs;
} else
if (!initialize) {
fclose(fp);
return 0;
}
if (initialize) {
++total_msgs;
if (curr->status == 'N')
++total_new;
if (curr->tag == 'T')
++total_tag;
}
}
fclose(fp);
return 0;
}
/*
* Print a header field from char postion start to end,
* padding with spaces as needed
*/
void printfield(char *s, uint8_t start, uint8_t end) {
uint8_t i;
uint8_t l = strlen(s);
for (i = start; i < end; i++)
putchar(i < l ? s[i] : ' ');
}
/*
* Print one line summary of email headers for one message
*/
void print_one_email_summary(struct emailhdrs *h, uint8_t inverse) {
putchar(inverse ? INVERSE : NORMAL);
putchar(h->tag == 'T' ? 'T' : ' ');
switch(h->status) {
case 'N':
putchar('*'); // New
break;
case 'R':
putchar(' '); // Read
break;
case 'D':
putchar('D'); // Deleted
break;
}
//printf("%02d|", h->emailnum);
putchar('|');
printfield(h->date, 0, 16);
putchar('|');
printfield(h->from, 0, 20);
putchar('|');
printfield(h->subject, 0, 39);
//putchar('\r');
putchar(NORMAL);
}
/*
* Get emailhdrs for nth email in list of headers
*/
struct emailhdrs *get_headers(uint16_t n) {
uint16_t i = 1;
struct emailhdrs *h = headers;
while (h && (i < n)) {
++i;
h = h->next;
}
return h;
}
/*
* Print status bar at the top
*/
void status_bar(void) {
putchar(HOME);
putchar(INVERSE);
fputs(" ", stdout);
printsystemdate();
putchar(HOME);
if (num_msgs == 0)
printf("%c%s [%s] No messages ", INVERSE, PROGNAME, curr_mbox);
else
printf("%c[%s] %u msgs, %u new, %u tagged. Showing %u-%u. ",
INVERSE, curr_mbox, total_msgs, total_new, total_tag, first_msg,
first_msg + num_msgs - 1);
putchar(NORMAL);
putchar(CURDOWN);
printf("\n");
}
/*
* Show email summary
*/
void email_summary(void) {
uint8_t i = 1;
struct emailhdrs *h = headers;
clrscr();
status_bar();
while (h) {
print_one_email_summary(h, (i == selection));
++i;
h = h->next;
}
putchar(HOME);
for (i = 0; i < MENU_ROW - 1; ++i)
putchar(CURDOWN);
printf("%cUp/K Prev | SPC/RET Read | A)rchive | C)opy | M)ove | D)el | U)ndel | P)urge %c", INVERSE, NORMAL);
printf("%cDn/J Next | S)witch mbox | N)ew mbox| T)ag | W)rite | R)eply | F)wd | Q)uit %c", INVERSE, NORMAL);
}
/*
* Show email summary for nth email message in list of headers
*/
void email_summary_for(uint16_t n) {
struct emailhdrs *h = headers;
uint16_t j;
h = get_headers(n);
putchar(HOME);
for (j = 0; j < n + 1; ++j)
putchar(CURDOWN);
print_one_email_summary(h, (n == selection));
}
/*
* Move the highlight bar when user selects different message
*/
void update_highlighted(void) {
email_summary_for(prevselection);
email_summary_for(selection);
}
/*
* Read a text file a line at a time leaving the line in linebuf[]
* Returns number of chars in the line, or -1 if EOF.
* Expects Apple ][ style line endings (CR) and does no conversion
* fp - file to read from
* reset - if 1 then just reset the buffer and return
*/
int16_t get_line(FILE *fp, uint8_t reset) {
static uint16_t rd = 0;
static uint16_t buflen = 0;
uint8_t found = 0;
uint16_t j = 0;
uint16_t i;
if (reset) {
rd = buflen = 0;
return 0;
}
while (1) {
for (i = rd; i < buflen; ++i) {
linebuf[j++] = buf[i];
if (linebuf[j - 1] == '\r') {
found = 1;
break;
}
}
if (found) {
rd = i + 1;
linebuf[j] = '\0';
return j;
}
buflen = fread(buf, 1, READSZ, fp);
if (buflen == 0) {
rd = 0;
return -1; // Hit EOF before we found EOL
}
rd = 0;
}
}
/*
* Convert hex char to value
*/
uint8_t hexdigit(char c) {
if ((c >= '0') && (c <= '9'))
return c - '0';
else
return c - 'A' + 10;
}
/*
* Decode linebuf[] from quoted-printable format and print on screen
*/
void print_quoted_printable(void) {
uint16_t i = 0;
char c;
while (c = linebuf[i]) {
if (c == '=') {
if (linebuf[i + 1] == '\r') // Trailing '=' is a soft EOL
return;
// Otherwise '=xx' where x is a hex digit
c = 16 * hexdigit(linebuf[i + 1]) + hexdigit(linebuf[i + 2]);
if ((c >= 0x20) && (c <= 0x7e))
putchar(c);
i += 3;
} else {
putchar(c);
++i;
}
}
}
/*
* Decode linebuf[] from Base64 format and print on screen
*/
void print_base64(void) {
// TODO
}
/*
* Display email with simple pager functionality
*/
void email_pager(void) {
uint32_t pos = 0;
uint8_t *p = (uint8_t*)CURSORROW, mime = 0, mime_type = 0;
struct emailhdrs *h = get_headers(selection);
uint8_t eof;
char c;
clrscr();
sprintf(filename, "%s/%s/EMAIL.%u", cfg_emaildir, curr_mbox, h->emailnum);
fp = fopen(filename, "rb");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s", filename);
return;
}
pos = h->skipbytes;
fseek(fp, pos, SEEK_SET); // Skip over headers
restart:
clrscr();
fputs("Date: ", stdout);
printfield(h->date, 0, 39);
fputs("\nFrom: ", stdout);
printfield(h->from, 0, 70);
fputs("\nTo: ", stdout);
printfield(h->to, 0, 70);
if (h->cc[0] != '\0') {
fputs("\nCC: ", stdout);
printfield(h->cc, 0, 70);
}
fputs("\nSubject: ", stdout);
printfield(h->subject, 0, 70);
fputs("\n\n", stdout);
get_line(fp, 1); // Reset buffer
while (1) {
if (get_line(fp, 0) == -1)
eof = 1;
else {
if ((mime >= 1) && (!strncmp(linebuf, "--", 2))) {
mime = 2;
mime_type = 0;
} else if ((mime >= 2) && (!strncmp(linebuf, "Content-Type: ", 14))) {
if ((!strncmp(linebuf + 14, "text/plain", 10)) ||
(!strncmp(linebuf + 14, "text/html", 9))) {
mime = 3;
} else {
printf("Unsupp content %s\n", linebuf + 14);
mime = 1;
}
} else if ((mime >= 2) && (!strncmp(linebuf, "Content-Transfer-Encoding: ", 27))) {
mime = 3;
if (!strncmp(linebuf + 27, "7bit", 4))
mime_type = 0;
else if (!strncmp(linebuf + 27, "quoted-printable", 16))
mime_type = 1;
else if (!strncmp(linebuf + 27, "base64", 6))
mime_type = 2;
else {
printf("Unsupp encoding %s\n", linebuf + 27);
mime = 1;
}
} else if ((mime == 3) && (!strncmp(linebuf, "\r", 1)))
mime = 4;
if ((mime == 0) || ((mime == 4) && (mime_type == 0)))
fputs(linebuf, stdout);
else if ((mime == 4) && (mime_type == 1))
print_quoted_printable();
else if ((mime == 4) && (mime_type == 2))
print_base64();
}
if ((*p) == 22) { // Use the CURSOR ROW location
putchar(INVERSE);
printf("[%05lu] SPACE continue reading | B)ack | T)op | H)drs | M)IME | Q)uit", pos);
putchar(NORMAL);
retry1:
c = cgetc();
switch (c) {
case ' ':
break;
case 'B':
case 'b':
if (pos < h->skipbytes + (uint32_t)(SCROLLBACK)) {
pos = h->skipbytes;
fseek(fp, pos, SEEK_SET);
goto restart;
} else {
pos -= (uint32_t)(SCROLLBACK);
fseek(fp, pos, SEEK_SET);
}
break;
case 'T':
case 't':
mime = 0;
pos = h->skipbytes;
fseek(fp, pos, SEEK_SET);
goto restart;
break;
case 'H':
case 'h':
mime = 0;
pos = 0;
fseek(fp, pos, SEEK_SET);
goto restart;
break;
case 'M':
case 'm':
mime = 1;
pos = 0;
fseek(fp, pos, SEEK_SET);
goto restart;
case 'Q':
case 'q':
fclose(fp);
return;
default:
putchar(BELL);
goto retry1;
}
clrscr();
} else if (eof) {
putchar(INVERSE);
printf("[%05lu] *** END *** | B)ack | T)op | H)drs | M)IME | Q)uit", pos);
putchar(NORMAL);
retry2:
c = cgetc();
switch (c) {
case 'B':
case 'b':
if (pos < h->skipbytes + (uint32_t)(SCROLLBACK)) {
pos = h->skipbytes;
fseek(fp, pos, SEEK_SET);
goto restart;
} else {
pos -= (uint32_t)(SCROLLBACK);
fseek(fp, pos, SEEK_SET);
}
break;
case 'T':
case 't':
mime = 0;
pos = h->skipbytes;
fseek(fp, pos, SEEK_SET);
goto restart;
break;
case 'H':
case 'h':
mime = 0;
pos = 0;
fseek(fp, pos, SEEK_SET);
goto restart;
break;
case 'M':
case 'm':
mime = 1;
pos = 0;
fseek(fp, pos, SEEK_SET);
goto restart;
break;
case 'Q':
case 'q':
fclose(fp);
return;
default:
putchar(BELL);
goto retry2;
}
clrscr();
}
}
}
/*
* Write updated email headers to EMAIL.DB
*/
void write_updated_headers(struct emailhdrs *h, uint16_t pos) {
uint16_t l;
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, curr_mbox);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp = fopen(filename, "rb+");
if (!fp)
error(ERR_FATAL, "Can't open %s", filename);
if (fseek(fp, (pos - 1) * EMAILHDRS_SZ_ON_DISK, SEEK_SET))
error(ERR_FATAL, "Can't seek in %s", filename);
l = fwrite(h, 1, EMAILHDRS_SZ_ON_DISK, fp);
if (l != EMAILHDRS_SZ_ON_DISK)
error(ERR_FATAL, "Can't write to %s", filename);
fclose(fp);
}
/*
* Create new mailbox
* Create directory, EMAIL.DB and NEXT.EMAIL files
*/
void new_mailbox(char *mbox) {
sprintf(filename, "%s/%s", cfg_emaildir, mbox);
if (mkdir(filename)) {
error(ERR_NONFATAL, "Can't create dir %s", filename);
return;
}
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, mbox);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
error(ERR_NONFATAL, "Can't create EMAIL.DB");
return;
}
fclose(fp);
sprintf(filename, "%s/%s/NEXT.EMAIL", cfg_emaildir, mbox);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
error(ERR_NONFATAL, "Can't create NEXT.EMAIL");
return;
}
fprintf(fp, "1");
fclose(fp);
}
/*
* Change current mailbox
*/
void switch_mailbox(char *mbox) {
char prev_mbox[80];
uint8_t err;
// Treat '.' as shortcut for INBOX
if (!strcmp(mbox, "."))
strcpy(mbox, "INBOX");
strcpy(prev_mbox, curr_mbox);
strcpy(curr_mbox, mbox);
first_msg = 1;
err = read_email_db(first_msg, 1, 1); // Errors non-fatal
if (err) {
strcpy(curr_mbox, prev_mbox);
return;
}
selection = 1;
email_summary();
}
/*
* Purge deleted messages from current mailbox
*/
void purge_deleted(void) {
uint16_t count = 0, delcount = 0;
struct emailhdrs *h;
FILE *fp2;
uint16_t l;
h = (struct emailhdrs*)malloc(sizeof(struct emailhdrs));
if (!h)
error(ERR_FATAL, "Can't malloc()");
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, curr_mbox);
fp = fopen(filename, "rb");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s", filename);
return;
}
sprintf(filename, "%s/%s/EMAIL.DB.NEW", cfg_emaildir, curr_mbox);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp2 = fopen(filename, "wb");
if (!fp2) {
error(ERR_NONFATAL, "Can't open %s", filename);
return;
}
while (1) {
l = fread(h, 1, EMAILHDRS_SZ_ON_DISK, fp);
++count;
if (l != EMAILHDRS_SZ_ON_DISK)
goto done;
if (h->status == 'D') {
sprintf(filename, "%s/%s/EMAIL.%u", cfg_emaildir, curr_mbox, h->emailnum);
if (unlink(filename)) {
error(ERR_NONFATAL, "Can't delete %s", filename);
}
goto_prompt_row();
putchar(CLRLINE);
printf("%u msgs deleted", ++delcount);
} else {
l = fwrite(h, 1, EMAILHDRS_SZ_ON_DISK, fp2);
if (l != EMAILHDRS_SZ_ON_DISK) {
error(ERR_NONFATAL, "Can't write to %s", filename);
free(h);
fclose(fp);
fclose(fp2);
return;
}
}
}
done:
free(h);
fclose(fp);
fclose(fp2);
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, curr_mbox);
if (unlink(filename)) {
error(ERR_NONFATAL, "Can't delete %s", filename);
return;
}
sprintf(userentry, "%s/%s/EMAIL.DB.NEW", cfg_emaildir, curr_mbox);
if (rename(userentry, filename)) {
error(ERR_NONFATAL, "Can't rename %s", userentry);
return;
}
read_email_db(first_msg, 1, 0);
email_summary();
}
/*
* Get next email number from NEXT.EMAIL
* Returns 1 on error, 0 if all is good
*/
uint8_t get_next_email(char *mbox, uint16_t *num) {
sprintf(filename, "%s/%s/NEXT.EMAIL", cfg_emaildir, mbox);
fp = fopen(filename, "rb");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s/NEXT.EMAIL", mbox);
return 1;
}
fscanf(fp, "%u", num);
fclose(fp);
return 0;
}
/*
* Update NEXT.EMAIL file
*/
uint8_t update_next_email(char *mbox, uint16_t num) {
sprintf(filename, "%s/%s/NEXT.EMAIL", cfg_emaildir, mbox);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s/NEXT.EMAIL", mbox);
return 1;
}
fprintf(fp, "%u", num);
fclose(fp);
return 0;
}
/*
* Copy string p to q truncating any trailing spaces.
*/
void truncate_header(char *p, char *q, uint8_t l) {
int16_t last_char = -1;
uint8_t i;
for (i = 0; i < l; ++i) {
q[i] = p[i];
if ((p[i] != ' ') && (p[i] != '\0'))
last_char = i;
}
q[last_char + 1] = '\0';
}
/*
* Parse 'from' address, of the form 'Joe Smith <jsmith@example.org>'
* If < > angle brackets are present, just return the text within them,
* otherwise return the whole string.
* p - input buffer
* q - output buffer
* Returns 0 if okay, 1 on error
*/
uint8_t parse_from_addr(char *p, char *q) {
char *start = strchr(p, '<');
char *end = strchr(p, '>');
uint8_t l;
if (!start) {
strcpy(q, p);
return 0;
} else {
if (end)
l = end - start - 1;
else {
error(ERR_NONFATAL, "Bad address format '%s'", p);
return 1;
}
}
strncpy(q, start + 1, l);
q[l] = '\0';
return 0;
}
/*
* Prompt for a name in the line below the menu, store it in userentry
* Returns number of chars read.
* prompt - Message to display before > prompt
* is_file - if 1, restrict chars to those allowed in ProDOS filename
* Returns number of chars read
*/
uint8_t prompt_for_name(char *prompt, uint8_t is_file) {
uint16_t i;
char c;
goto_prompt_row();
printf("%s>", prompt);
i = 0;
while (1) {
c = cgetc();
if (is_file && !isalnum(c) && (c != RETURN) && (c != BACKSPACE) && (c != DELETE) && (c != '.')) {
putchar(BELL);
continue;
}
switch (c) {
case RETURN:
goto done;
case BACKSPACE:
case DELETE:
if (i > 0) {
putchar(BACKSPACE);
putchar(' ');
putchar(BACKSPACE);
--i;
} else
putchar(BELL);
break;
default:
putchar(c);
userentry[i++] = c;
}
if (i == 79)
goto done;
}
done:
userentry[i] = '\0';
putchar(CLRLINE);
goto_prompt_row();
return i;
}
/*
* Write email headers for replies and forwarded messages
* fp1 - File handle of the mail message being replied/forwarded
* fp2 - File handle of the destination mail message
* h - headers of the message being replied/forwarded
* mode - 'R' for reply, 'F' for forward
* Returns 0 if okay, 1 on error
*/
uint8_t write_email_headers(FILE *fp1, FILE *fp2, struct emailhdrs *h, char mode) {
struct datetime dt;
fprintf(fp2, "From: %s\r", cfg_emailaddr);
truncate_header(h->subject, buf, 80);
fprintf(fp2, "Subject: %s: %s\r", (mode == 'F' ? "Fwd" : "Re"), buf);
readdatetime((unsigned char*)(SYSTEMTIME), &dt);
datetimelong(&dt, buf);
fprintf(fp2, "Date: %s\r", buf);
if (mode == 'R') {
truncate_header(h->from, filename, 80);
if (parse_from_addr(filename, buf))
return 1;
fprintf(fp2, "To: %s\r", buf);
} else {
prompt_for_name("Fwd to", 0);
if (strlen(userentry) == 0)
return 0;
fprintf(fp2, "To: %s\r", userentry);
}
prompt_for_name("cc", 0);
fprintf(fp2, "cc: %s\r", userentry);
fprintf(fp2, "X-Mailer: %s - Apple II Forever!\r\r", PROGNAME);
if (mode == 'R') {
truncate_header(h->date, buf, 40);
fprintf(fp2, "On %s, ", buf);
truncate_header(h->from, buf, 80);
fprintf(fp2, "%s wrote:\r\r", buf);
} else {
fprintf(fp2, "-------- Forwarded Message --------\r");
truncate_header(h->subject, buf, 80);
fprintf(fp2, "Subject: %s\r", buf);
truncate_header(h->date, buf, 40);
fprintf(fp2, "Date: %s\r", buf);
truncate_header(h->from, buf, 80);
fprintf(fp2, "From: %s\r", buf);
truncate_header(h->to, buf, 80);
fprintf(fp2, "To: %s\r\r", buf);
}
fseek(fp1, h->skipbytes, SEEK_SET); // Skip headers when copying
return 0;
}
/*
* Copies the current message to mailbox mbox.
* h is a pointer to the emailheaders for the message to copy
* idx is the index of the message in EMAIL.DB in the source mailbox (1-based)
* mbox is the name of the destination mailbox
* delete - if set to 1 then the message will be marked as deleted in the
* source mbox
* mode - 'R' for reply, 'F' for forward, otherwise ' '
*/
void copy_to_mailbox(struct emailhdrs *h, uint16_t idx,
char *mbox, uint8_t delete, char mode) {
uint16_t num, buflen, written, l;
FILE *fp2;
// Read next number from dest/NEXT.EMAIL
if (get_next_email(mbox, &num))
return;
// Open source email file
sprintf(filename, "%s/%s/EMAIL.%u", cfg_emaildir, curr_mbox, h->emailnum);
fp = fopen(filename, "rb");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s", filename);
return;
}
// Open destination email file
sprintf(filename, "%s/%s/EMAIL.%u", cfg_emaildir, mbox, num);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
fp2 = fopen(filename, "wb");
if (!fp2) {
fclose(fp);
error(ERR_NONFATAL, "Can't open %s", filename);
return;
}
if (mode != ' ')
if (write_email_headers(fp, fp2, h, mode)) {
error(ERR_NONFATAL, "Invalid email header");
fclose(fp);
fclose(fp2);
return;
}
// Make sure spinner is in the right place
if ((mode == 'R') || (mode == 'F'))
goto_prompt_row();
// Copy email
putchar(' '); // For spinner
while (1) {
buflen = fread(buf, 1, READSZ, fp);
spinner();
if (buflen == 0)
break;
written = fwrite(buf, 1, buflen, fp2);
if (written != buflen) {
error(ERR_NONFATAL, "Write error during copy");
fclose(fp);
fclose(fp2);
return;
}
}
putchar(BACKSPACE);
putchar(' ');
putchar(BACKSPACE);
fclose(fp);
fclose(fp2);
// Update dest/EMAIL.DB unless this is R)eply or F)orward
// The upshot of this is we never create EMAIL.DB in OUTBOX
if (mode == ' ') {
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, mbox);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp = fopen(filename, "ab");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s/EMAIL.DB", mbox);
return;
}
buflen = h->emailnum; // Just reusing buflen as a temporary
h->emailnum = num;
l = fwrite(h, 1, EMAILHDRS_SZ_ON_DISK, fp);
if (l != EMAILHDRS_SZ_ON_DISK) {
error(ERR_NONFATAL, "Can't write to %s/EMAIL.DB %u %u", mbox);
return;
}
h->emailnum = buflen ;
fclose(fp);
}
// Update dest/NEXT.EMAIL, incrementing count by 1
if (update_next_email(mbox, num + 1))
return;
if (delete)
h->status = 'D';
h->tag = ' '; // Untag files after copy or move
write_updated_headers(h, idx);
email_summary_for(selection);
if (mode != ' ') {
// Not really an error but useful to have an alert
sprintf(filename, "Created %s %s/OUTBOX/EMAIL.%u",
(mode == 'R' ? "reply" : "fwded msg"), cfg_emaildir, num);
error(ERR_NONFATAL, filename);
}
}
/*
* Prompt ok?
*/
char prompt_okay(char *msg) {
char c;
goto_prompt_row();
printf("%sSure? (y/n)", msg);
while (1) {
c = cgetc();
if ((c == 'y') || (c == 'Y') || (c == 'n') || (c == 'N'))
break;
putchar(BELL);
}
if ((c == 'y') || (c == 'Y'))
c = 1;
else
c = 0;
putchar(CLRLINE);
return c;
}
/*
* Check if there are tagged messages. If not, just call copy_to_mailbox()
* on the current message. If they are, prompt the user and, if affirmative,
* iterate through the tagged messages calling copy_to_mailbox() on each.
*/
uint8_t copy_to_mailbox_tagged(char *mbox, uint8_t delete) {
uint16_t count = 0, tagcount = 0;
struct emailhdrs *h;
uint16_t l;
if (total_tag == 0) {
h = get_headers(selection);
copy_to_mailbox(h, first_msg + selection - 1, mbox, delete, ' ');
return 0;
}
sprintf(filename, "%u tagged - ", total_tag);
if (!prompt_okay(filename))
return 0;
h = (struct emailhdrs*)malloc(sizeof(struct emailhdrs));
if (!h)
error(ERR_FATAL, "Can't malloc()");
while (1) {
sprintf(filename, "%s/%s/EMAIL.DB", cfg_emaildir, curr_mbox);
_filetype = PRODOS_T_BIN;
_auxtype = 0;
fp = fopen(filename, "rb+");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s", filename);
return 1;
}
if (fseek(fp, count * EMAILHDRS_SZ_ON_DISK, SEEK_SET)) {
error(ERR_NONFATAL, "Can't seek in %s", filename);
goto err;
}
l = fread(h, 1, EMAILHDRS_SZ_ON_DISK, fp);
fclose(fp);
++count;
if (l != EMAILHDRS_SZ_ON_DISK) {
free(h);
read_email_db(first_msg, 1, 0);
email_summary();
return 0;
}
if (h->tag == 'T') {
h->tag = ' '; // Don't want it tagged in the destination
goto_prompt_row();
putchar(CLRLINE);
printf("%u/%u:", ++tagcount, total_tag);
copy_to_mailbox(h, count, mbox, delete, ' ');
}
}
err:
free(h);
fclose(fp);
return 1;
}
/*
* Create a blank outgoing message and put it in OUTBOX.
* OUTBOX is not a 'proper' mailbox (no EMAIL.DB)
*/
void create_blank_outgoing() {
struct datetime dt;
uint16_t num;
// Read next number from dest/NEXT.EMAIL
if (get_next_email("OUTBOX", &num))
return;
// Open destination email file
sprintf(filename, "%s/OUTBOX/EMAIL.%u", cfg_emaildir, num);
_filetype = PRODOS_T_TXT;
_auxtype = 0;
fp = fopen(filename, "wb");
if (!fp) {
error(ERR_NONFATAL, "Can't open %s", filename);
return;
}
fprintf(fp, "From: %s\r", cfg_emailaddr);
prompt_for_name("To", 0);
if (strlen(userentry) == 0)
return;
fprintf(fp, "To: %s\r", userentry);
prompt_for_name("Subject", 0);
fprintf(fp, "Subject: %s\r", userentry);
readdatetime((unsigned char*)(SYSTEMTIME), &dt);
datetimelong(&dt, userentry);
fprintf(fp, "Date: %s\r", userentry);
prompt_for_name("cc", 0);
fprintf(fp, "cc: %s\r", userentry);
fprintf(fp, "X-Mailer: %s - Apple II Forever!\r\r", PROGNAME);
fclose(fp);
// Update dest/NEXT.EMAIL, incrementing count by 1
if (update_next_email("OUTBOX", num + 1))
return;
// Not really an error but useful to have an alert
sprintf(filename, "Created file %s/OUTBOX/EMAIL.%u", cfg_emaildir, num);
error(ERR_NONFATAL, filename);
}
/*
* Keyboard handler
*/
void keyboard_hdlr(void) {
struct emailhdrs *h;
while (1) {
char c = cgetc();
switch (c) {
case 'k':
case 'K':
case UPARROW:
if (selection > 1) {
prevselection = selection;
--selection;
update_highlighted();
} else if (first_msg > MSGS_PER_PAGE) {
first_msg -= MSGS_PER_PAGE;
read_email_db(first_msg, 0, 0);
selection = num_msgs;
email_summary();
}
break;
case 't':
case 'T':
h = get_headers(selection);
if (h) {
if (h->tag == 'T') {
h->tag = ' ';
--total_tag;
} else {
h->tag = 'T';
++total_tag;
}
write_updated_headers(h, first_msg + selection - 1);
email_summary_for(selection);
status_bar();
}
// Fallthrough so tagging also moves down!!!
case 'j':
case 'J':
case DOWNARROW:
if (selection < num_msgs) {
prevselection = selection;
++selection;
update_highlighted();
} else if (first_msg + selection - 1 < total_msgs) {
first_msg += MSGS_PER_PAGE;
read_email_db(first_msg, 0, 0);
selection = 1;
email_summary();
}
break;
case RETURN:
case ' ':
h = get_headers(selection);
if (h) {
if (h->status == 'N')
--total_new;
h->status = 'R'; // Mark email read
write_updated_headers(h, first_msg + selection - 1);
}
email_pager();
email_summary();
break;
case 'd':
case 'D':
h = get_headers(selection);
if (h) {
h->status = 'D';
write_updated_headers(h, first_msg + selection - 1);
email_summary_for(selection);
}
break;
case 'u':
case 'U':
h = get_headers(selection);
if (h) {
h->status = 'R';
write_updated_headers(h, first_msg + selection - 1);
email_summary_for(selection);
}
break;
case 'c':
case 'C':
if (prompt_for_name("Copy to mbox", 1))
copy_to_mailbox_tagged(userentry, 0);
break;
case 'm':
case 'M':
if (prompt_for_name("Move to mbox", 1))
copy_to_mailbox_tagged(userentry, 1);
break;
case 'a':
case 'A':
goto_prompt_row();
copy_to_mailbox_tagged("RECEIVED", 1);
break;
case 'p':
case 'P':
if (prompt_okay("Purge - ")) {
purge_deleted();
switch_mailbox(curr_mbox);
}
break;
case 'n':
case 'N':
if (prompt_for_name("New mbox", 1))
new_mailbox(userentry);
break;
case 's':
case 'S':
if (prompt_for_name("Switch mbox", 1))
switch_mailbox(userentry);
break;
case 'w':
case 'W':
create_blank_outgoing();
break;
case 'r':
case 'R':
h = get_headers(selection);
copy_to_mailbox(h, first_msg + selection - 1, "OUTBOX", 0, 'R');
break;
case 'f':
case 'F':
h = get_headers(selection);
copy_to_mailbox(h, first_msg + selection - 1, "OUTBOX", 0, 'F');
break;
case 'q':
case 'Q':
if (prompt_okay("Quit - ")) {
clrscr();
exit(0);
}
default:
//printf("[%02x]", c);
putchar(BELL);
}
}
}
void main(void) {
videomode(VIDEOMODE_80COL);
readconfigfile();
first_msg = 1;
read_email_db(first_msg, 1, 0);
selection = 1;
email_summary();
keyboard_hdlr();
}
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