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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wctype.h>
#include <wchar.h>
#include <locale.h>

#include "config.h"
#include "regexset.h"
#include "channel.h"
#include "user.h"
#include "word.h"
#include "export_xml.h"
#include "nick.h"

#define NICK_BUFFER_SIZE 0x100
#define TEXT_BUFFER_SIZE 0x400
#define LINE_BUFFER_SIZE 0x400
#define TIME_BUFFER_SIZE 0xf

int main(int argc, char **argv) {
	/* Set locale. */
	setlocale(LC_CTYPE, "");

	/* Regex sets must be initialized before config. */
	rs_init();
	channel_init();
	nick_init();
	if(!cfg_init()) {
		/*	Free any registered regex sets and channels when config fails.
			Config will fail if a regex set fails to compile all parts. */
		rs_free();
		channel_free();
		return 1;
	}

	/* Parsing stuff goes here. */
	for(int chan_i = 0; chan_i < channel_get_count(); chan_i++) {
		user_init();
		word_init();
		struct channel_t *channel = channel_get(chan_i);
		printf("Channel %s\n", channel->name);
		struct channel_file_t *file = channel->files;
		while(file) {
			struct regexset_t *rs = file->rs;
			FILE *f = fopen(file->path, "r");
			if(!f) {
				fprintf(stderr, "\tFailed to open %s\n", file->path);
				file = file->next;
				continue;
			} else
				printf("\tParsing %s\n", file->path);

			char line[LINE_BUFFER_SIZE];
			while(fgets(line, LINE_BUFFER_SIZE, f)) {
				int rc;
				int ovector[30];

				rc = pcre_exec(rs->text, rs->text_e, line, strlen(line), 0, 0, ovector, 30);
				if(rc > 0) {
					char nick[NICK_BUFFER_SIZE], text[TEXT_BUFFER_SIZE], hour_s[TIME_BUFFER_SIZE], min_s[TIME_BUFFER_SIZE];
					pcre_copy_named_substring(rs->text, line, ovector, rc, "nick", nick, NICK_BUFFER_SIZE);
					pcre_copy_named_substring(rs->text, line, ovector, rc, "text", text, TEXT_BUFFER_SIZE);
					pcre_copy_named_substring(rs->text, line, ovector, rc, "hour", hour_s, TIME_BUFFER_SIZE);
					pcre_copy_named_substring(rs->text, line, ovector, rc, "minute", min_s, TIME_BUFFER_SIZE);
					struct user_t *user = user_get(nick);

					/* Calculate array index for lines. */
					int hour, min, time_i;
					hour = atoi(hour_s);
					min = atoi(min_s);
					time_i = hour*4 + min / 15;

					user->lines[time_i]++;
					channel->hours[time_i]++;

					/* Count words. */
					wchar_t wtext[TEXT_BUFFER_SIZE];
					mbstowcs(wtext, text, TEXT_BUFFER_SIZE);
					wchar_t word[TEXT_BUFFER_SIZE];
					wchar_t *end = wcschr(wtext, '\0');
					*word = '\0';
					int len = 0;
					for(wchar_t *pos = wtext; pos < end; pos++) {
						if(iswblank(*pos)) {
							if(len) {
								user->words++;
								word[len] = '\0';
								char mbword[TEXT_BUFFER_SIZE];
								wcstombs(mbword, word, TEXT_BUFFER_SIZE);
								struct word_t *word_s = word_get(mbword);
								word_s->count++;
							}
							len = 0;
							*word = '\0';
						} else if(iswalpha(*pos)) {
							word[len++] = towlower(*pos);
						} else {
							len = 0;
							*word = '\0';
						}
					}
					if(len) {
						user->words++;
						word[len] = '\0';
						char mbword[TEXT_BUFFER_SIZE];
						wcstombs(mbword, word, TEXT_BUFFER_SIZE);
						struct word_t *word_s = word_get(mbword);
						word_s->count++;
					}
					continue;
				}

				rc = pcre_exec(rs->join, rs->join_e, line, strlen(line), 0, 0, ovector, 30);
				if(rc > 0) {
					char nick[NICK_BUFFER_SIZE];
					pcre_copy_named_substring(rs->join, line, ovector, rc, "nick", nick, NICK_BUFFER_SIZE);
					struct user_t *user = user_get(nick);
					continue;
				}
			}
			fclose(f);

			file = file->next;
		}
		export_xml(channel, users);
		user_free();
		word_free();
	}

	nick_free();
	cfg_free();
	channel_free();
	rs_free();

	return 0;
}