#include <stdio.h>
#include <stdlib.h>		/* calloc */
#include <string.h>		/* memmove */
#include <unistd.h>	/* chdir */
#include "shared.h"

static char *read_dir(FILE *dir_dump, char *buf)
{
	static char *contents = NULL;
	int read, size = 0;
	while ((read = fread(buf, 1, bufsize, dir_dump)) > 0) {
		size += read;
		contents = realloc(contents, size);
		memmove(&contents[size-read], buf, read);
	}
	return contents;
}

const char *key_delim = "\":";
/* Return character pointer to beginning of value. */
char *
getval(char *str, char *key)
{
	key = realloc(key, strlen(key) + strlen(key_delim) + 1);
	strcat(key, key_delim);
	char *rt = strstr(str, key);
	if (rt == NULL) {
		fprintf(stderr, "%s\n", "Invalid key.\n");
	}
	return rt;
}

/* Count directories. */
int
count_dir(char *contents)
{
	int count = 0;
	char *p = contents;
	while ((p = strstr(p, "\n")) != NULL) {
		count++;
		p = &p[1]; /* Increment p past the current '\n'. */
	}
	return count;
}

int
main(int argc, char **argv)
{

	char *path = NULL;
	if (argc > 1) {
		path = argv[1];
	}

	chdir("dump");
	FILE *root_stream = fopen("folders", "r");
	if (root_stream == NULL) {
		fprintf(stderr, "Generate a dump of your Canvas"
			" account directory structure"
			" using dump.sh.\n");
		return 1;
	}

	char buf[bufsize];
	char *root_contents = read_dir(root_stream, buf);
	int root_count = count_dir(root_contents);
	printf("%d\n", root_count);

	return 0;
}