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|
// : out wip
/*
I have the following spec, I need you to write a C program that fills this spec:
- this program is called 'wip' and will record 'updates'
- an 'update' is a line of text with a timestamp
- this program should use 'argp.h' for processing command line arguments
- The command line interface has two subcommands, "submit" and "review"
- submit command:
- takes a line of text and writes the timestamp and line of text separated by a tab to a file called 'wip.dat'. This represents one 'update'
- the timestamp format should be "%Y-%m-%d %H:%M:%S"
- review command:
- reads the file 'wip.dat' and prints all the updates for the given week.
- takes an flag '--period' for determining which week to report updates for
- '--period' takes an argument which can be either 'thisweek' or 'lastweek', defaulting to 'thisweek' if not given
Here is some example usage:
$ wip submit "This is my update"
$ wip submit "This is a second update"
$ wip review
Updates for this week:
+ This is my update
+ This is a second update
$ wip review -p thisweek
Updates for this week:
+ This is my update
+ This is a second update
$ wip review --period lastweek
+ this was an update from last week
*/
#include <argp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define WIP_FILENAME "wip.dat"
#define TIMESTAMP_FORMAT "%Y-%m-%d %H:%M:%S"
const char *argp_program_version = "wip 1.0";
const char *argp_program_bug_address = "<your-email@example.com>";
static char doc[] = "A simple tool to record and review updates";
static struct argp_option options[] = {
{"period", 'p', "PERIOD", 0,
"Set the period for review (thisweek, lastweek)"},
{0}
};
struct arguments
{
char *command;
char *update;
char *period;
};
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
struct arguments *arguments = state->input;
switch (key)
{
case 'p':
arguments->period = arg;
break;
case ARGP_KEY_ARG:
if (arguments->command == NULL)
{
arguments->command = arg;
}
else if (arguments->update == NULL)
{
arguments->update = arg;
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = { options, parse_opt, "COMMAND [UPDATE]", doc };
void
submit_update (char *update)
{
FILE *file = fopen (WIP_FILENAME, "a");
if (file == NULL)
{
printf ("Could not open %s\n", WIP_FILENAME);
return;
}
time_t now;
time (&now);
struct tm *timeinfo = localtime (&now);
char timestamp[20];
strftime (timestamp, sizeof (timestamp), TIMESTAMP_FORMAT, timeinfo);
fprintf (file, "%s\t%s\n", timestamp, update);
fclose (file);
}
void
review_updates (char *period)
{
FILE *file = fopen (WIP_FILENAME, "r");
if (file == NULL)
{
printf ("Could not open %s\n", WIP_FILENAME);
return;
}
time_t now;
time (&now);
struct tm *timeinfo = localtime (&now);
int current_week = timeinfo->tm_yday / 7;
if (strcmp (period, "lastweek") == 0)
{
current_week--;
}
char line[256];
while (fgets (line, sizeof (line), file))
{
struct tm timeinfo_line = { 0 };
strptime (line, TIMESTAMP_FORMAT, &timeinfo_line);
int line_week = timeinfo_line.tm_yday / 7;
if (line_week == current_week)
{
printf ("+ %s", strchr (line, '\t') + 1);
}
}
fclose (file);
}
int
main (int argc, char **argv)
{
struct arguments arguments;
arguments.command = NULL;
arguments.update = NULL;
arguments.period = "thisweek";
argp_parse (&argp, argc, argv, 0, 0, &arguments);
if (arguments.command == NULL)
{
printf ("No command provided. Expected 'submit' or 'review'.\n");
return 1;
}
if (strcmp (arguments.command, "submit") == 0)
{
if (arguments.update == NULL)
{
printf ("No update provided for 'submit' command.\n");
return 1;
}
submit_update (arguments.update);
}
else if (strcmp (arguments.command, "review") == 0)
{
review_updates (arguments.period);
}
else
{
printf ("Unknown command '%s'. Expected 'submit' or 'review'.\n",
arguments.command);
return 1;
}
return 0;
}
|
