main.cpp

//
//  main.cpp
//



#include <iostream>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <queue>
#include "crawler/crawler.h"
#include <openssl/ssl.h>
#include <string>
//#include "crawler/CrawlerStatistics.h"
#include <unordered_map>
#include "util/util.h"
#include <getopt.h>
#include "indexer/Indexer.h"

#define PATH_TO_BLACKLIST = '/bin/blacklist.txt'
#define PATH_TO_VISITED_URL = 'bin/urls.txt'
#define PATH_TO_HTML_DIR = 'bin/html/'
#define PATH_TO_INDEX = 'bin/index/wordIDX'
#define PATH_TO_DOC_INDEX = 'bin/index/docIDX'

using DocIndex = const unordered_map< string, vector< unsigned long > >;

using namespace std;


int main ( int argc, char *argv[] )
	{
	/*
	 *
	 * Settings Flags to control program on start up
	 * to be read in via command line with default settings
	 *
	 * string :  Mode : Getting content from the web vs local
	 *
	 * string : Seed : filename of list of starting urls
	 *
	 * int  : numberOfSpiders: # of spiders crawler spawns
	 *
	 * int  : numberOfParsers:  # of parsers  spawned
	 *
	 * bool : restoreFromLog: bool represeting if the program should load from saved state
	 */

	//


	string mode = "web";
	int numberOfSpiders = 1;

	opterr = true;
	int choice;
	int option_index = 0;
	option long_options[] = {
			{ "mode",         optional_argument, nullptr, 'm' },
			{ "num_crawlers", optional_argument, nullptr, 'c' }

	};

	while ( ( choice = getopt_long( argc, argv, "m:c:", long_options, &option_index ) ) != -1 )
		{
		switch ( choice )
			{
			case 'm':

				mode = optarg;
				if ( mode != "web" && mode != "local" )
					{
					cerr << "Unknown input option";
					exit( 1 );
					}
				break;

			case 'c':

				numberOfSpiders = atoi( optarg );
				if ( numberOfSpiders > 100 )
					{
					cerr << "Too many crawlers!";
					exit( 1 );
					}
				break;

			default:
				cerr << "Unknown input option";
				exit( 1 );

			}
		}
	bool restoreFromLog;


	unordered_map< size_t, int > *duplicateUrlMap = new unordered_map< size_t, int >( );

	ProducerConsumerQueue< ParsedUrl > *urlFrontier = new ProducerConsumerQueue< ParsedUrl >( );
	ProducerConsumerQueue< DocIndex * > *IndexerQueue = new ProducerConsumerQueue< DocIndex * >( );


	char *seeds;
	if ( mode == "local" )
		seeds = util::getFileMap( "/tests/localSeed.txt" );
	else
		{
		seeds = util::getFileMap( "/tests/webSeed.txt" );
		SSL_library_init( );

		}

	string testFile;
	while ( *seeds )
		{
		if ( *seeds == '\n' )
			{

			ParsedUrl url = ParsedUrl( testFile );
			cout << "Pushing: " << testFile << " to queue\n";
			urlFrontier->Push( url );
			testFile = "";
			}
		else
			testFile.push_back( *seeds );
		++seeds;
		}
	if ( testFile != "" )
		{
		cout << "Pushing: " << testFile << " to queue\n";
		ParsedUrl url = ParsedUrl( testFile );
		urlFrontier->Push( url );
		}


	Indexer indexer( IndexerQueue );
	indexer.StartThread( );

	Crawler crawler( mode, urlFrontier, IndexerQueue );

	crawler.SpawnSpiders( numberOfSpiders, duplicateUrlMap );

	crawler.WaitOnAllSpiders( );
	indexer.WaitForFinish( );


	auto f = urlFrontier->Pop( );
	int x = 0;
	delete urlFrontier;
	}