Initial commit

1 files changed, 204 insertions, 0 deletions

diff --git a/cras.c b/cras.c
new file mode 100644
index 0000000..86f8ec5
--- /dev/null
+++ b/cras.c
@@ -0,0 +1,204 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+static char *argv0; /* Required here by arg.h */
+#include "arg.h"
+#include "tasklst.h"
+
+enum {
+	SHORT_OUTPUT,
+	LONG_OUTPUT
+};
+
+static void die(const char *fmt, ...);
+static void print_short_output(TaskLst tasks);
+static void print_output(TaskLst tasks);
+static void read_crasfile(TaskLst *tasks, const char *crasfile);
+static void write_crasfile(const char *crasfile, TaskLst tasks);
+static void read_user_input(TaskLst *tasks, FILE *fp);
+
+static void usage(void);
+static void set_tasks_mode(const char *crasfile);
+static void output_mode(const char *crasfile, int mode);
+static void mark_tasks_mode(const char *crasfile, const char *id, int mode);
+
+/* 
+ * crasfile_path defined here just for testing. It will be moved later to 
+ * config.(def.)h 
+ */
+static char crasfile_path[] = "crasfile";
+
+static void die(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+
+	vfprintf(stderr, fmt, ap);
+	fputc('\n', stderr);
+
+	va_end(ap);
+
+	exit(1);
+}
+
+static void
+print_short_output(TaskLst tasks)
+{
+	printf("%d/%d/%d to do/done/total\n", tasklst_tasks_todo(tasks),
+	       tasklst_tasks_done(tasks), tasklst_tasks_total(tasks));
+}
+
+static void
+print_output(TaskLst tasks)
+{
+	int i;
+
+	printf("Tasks due for: %s\n", ctime(&tasks.expiry));
+	
+	for(i = 0; i < TASK_LST_MAX_NUM; ++i) {
+		if (tasks.status[i] != TASK_VOID)
+			printf("#%02d [%s] %s\n", i + 1, 
+			       (tasks.status[i] == TASK_TODO) ? "TODO" : "DONE",
+			       tasks.tdesc[i]); 
+	}
+
+	if (i > 0)
+		putchar('\n');
+
+	print_short_output(tasks);
+}
+
+static void
+read_crasfile(TaskLst *tasks, const char *crasfile)
+{
+	int read_stat;
+	FILE *fp;
+
+	if ((fp = fopen(crasfile, "r")) == NULL)
+		die("Could not read from %s: %s", crasfile, strerror(errno));
+
+	read_stat = tasklst_read_from_file(tasks, fp);
+	fclose(fp);
+
+	if (read_stat < 0)
+		die("Parsing error: task file corrupted.");
+
+	if (tasklst_expired(*tasks) == 0)
+		die("Current task file expired: Set a new one!");
+}
+
+static void
+write_crasfile(const char *crasfile, TaskLst tasks)
+{
+	FILE *fp;
+
+	if ((fp = fopen(crasfile, "w")) == NULL)
+		die("Could not write to %s: %s", crasfile, strerror(errno));
+
+	tasklst_write_to_file(fp, tasks);
+	fclose(fp);
+}
+
+static void
+read_user_input(TaskLst *tasks, FILE *fp)
+{
+	char linebuf[TASK_LST_DESC_MAX_SIZE];
+	int i;
+	
+	for (i = 0; i < TASK_LST_MAX_NUM; ++i) {
+		fgets(linebuf, TASK_LST_DESC_MAX_SIZE, fp);
+		if (feof(fp) != 0)
+			break;
+		
+		linebuf[strlen(linebuf) - 1] = '\0';
+		strncpy(tasks->tdesc[i], linebuf, TASK_LST_DESC_MAX_SIZE);
+		tasks->status[i] = TASK_TODO;
+	}
+}
+
+static void
+usage(void)
+{
+	die("[STUB: Usage info]");
+}
+
+static void
+set_tasks_mode(const char *crasfile)
+{
+	TaskLst tasks;
+
+	tasklst_init(&tasks);
+	read_user_input(&tasks, stdin); /* Only stdin for now */
+	
+	tasklst_set_expiration(&tasks);
+	write_crasfile(crasfile, tasks);
+}
+
+static void
+output_mode(const char *crasfile, int mode)
+{
+	TaskLst tasks;
+
+	tasklst_init(&tasks);
+	read_crasfile(&tasks, crasfile);
+
+	if (mode == SHORT_OUTPUT)
+		print_short_output(tasks);
+	else
+		print_output(tasks);
+}
+
+static void
+mark_tasks_mode(const char *crasfile, const char *id, int mode)
+{
+	int tasknum;
+	char *endptr;
+	TaskLst tasks;
+
+	tasknum = strtol(id, &endptr, 10);
+	if (endptr[0] != '\0')
+		die("%s not a number", id);
+
+	tasklst_init(&tasks);
+	read_crasfile(&tasks, crasfile);
+
+	if (tasknum <= tasklst_tasks_total(tasks))
+		tasks.status[tasknum - 1] = mode;
+	else
+		die("Task #%d does not exist.", tasknum);
+
+	write_crasfile(crasfile, tasks);
+}
+
+int
+main(int argc, char *argv[])
+{
+	ARGBEGIN {
+		case 's':
+			set_tasks_mode(crasfile_path);
+			return 0;
+		case 'o':
+			output_mode(crasfile_path, SHORT_OUTPUT);
+			return 0;
+		case 't':
+			mark_tasks_mode(crasfile_path, EARGF(usage()),
+			                TASK_DONE);
+			return 0;
+		case 'T':
+			mark_tasks_mode(crasfile_path, EARGF(usage()), 
+			                TASK_TODO);
+			return 0;
+		default:
+			usage(); /* usage() dies, so nothing else needed. */
+	} ARGEND;
+
+	/* Default behavior: long-form output */
+	output_mode(crasfile_path, LONG_OUTPUT);
+	return 0;
+}