changed: the way how plugins work

all your plugin functions can have signature either:
void my_function(PluginInfo & info); or
void my_function();
only the main Init should have:
extern "C" void Init(PluginFunction & info);

added: directory 'plugins' for plugins
added: 'stats' plugin
		  


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@624 e52654a7-88a9-db11-a3e9-0013d4bc506e

plugins/stats/init.cpp

@@ -0,0 +1,246 @@
+/*
+ * This file is a part of Winix
+ * and is not publicly distributed
+ * 
+ * Copyright (c) 2010, Tomasz Sowa
+ * All rights reserved.
+ * 
+ */
+ 
+
+#include <map>
+#include "core/log.h"
+#include "core/request.h"
+#include "core/config.h"
+#include "core/db.h"
+
+#include "stats.h"
+#include "templates.h"
+#include "data.h"
+
+extern "C" void Init(PluginInfo &);
+const char plugin_name[] = "stats";
+
+
+namespace Stats
+{
+
+// when the statistics start
+time_t stats_start;
+
+
+// statistics for all pages
+StatsGlobal stat_global;
+
+// statistics for one item
+// <item_id, Stats>
+std::map<long, Stats> stats_tab;
+
+
+// when to save the config (how many requests should have gone)
+// (for safety: power failure etc)
+// default: 1000
+// you can set: stats_req_save_freq in the config file to overwrite it
+// 0 - turn it off
+int req_save_freq = 1000;
+int req_current = 0; // helper
+
+
+
+
+long ItemId()
+{
+long item_id;
+
+	if( request.is_item )
+		item_id = request.item.id;
+	else
+		item_id = request.dir_table.back()->id;
+
+return item_id;
+}
+
+
+void CheckSaving()
+{
+	req_current += 1;
+
+	if( req_save_freq != 0 && req_current >= req_save_freq )
+	{
+		SaveStats();
+		req_current = 0;
+	}
+}
+
+
+
+bool BrowserHas(const char * name)
+{
+	const char * is = strstr(request.env_http_user_agent, name);
+	return is != 0;
+}
+
+
+bool IsGoogle()
+{
+	return BrowserHas("Googlebot") && BrowserHas("www.google.com");
+}
+
+
+bool IsYahoo()
+{
+	return BrowserHas("Yahoo!") && BrowserHas("yahoo.com");
+}
+
+
+void UpdateStats(Stats & item_stats)
+{
+	stat_global.all += 1;
+	item_stats.all  += 1;
+
+	if( IsGoogle() )
+	{
+		stat_global.google += 1;
+		item_stats.google  += 1;
+	}
+
+	if( IsYahoo() )
+	{
+		stat_global.yahoo += 1;
+		item_stats.yahoo  += 1;
+	}
+}
+
+
+void ContentMake(PluginInfo & info)
+{
+StatsData * d = 0;
+
+	long id = ItemId();
+
+	if( info.plugin_data_base )
+		d = reinterpret_cast<StatsData*>(info.plugin_data_base);
+
+	// this simply prevents F5 (refresh) from a webbrowser
+	if( d && d->last_visited != -1 && d->last_visited == id )
+		return;
+
+	if( d )	
+		d->last_visited = id;
+
+	UpdateStats(stats_tab[id]);
+
+	if( d && !d->calculated )
+	{
+		stat_global.unique += 1;
+		d->calculated = true;
+	}
+
+	CheckSaving();
+}
+
+
+
+void SessionCreated(PluginInfo & info)
+{
+	StatsData * d = new StatsData();
+	request.session->plugin_data.Assign(d);
+
+	log << log3 << "created stats plugin data"
+		<< ", plugin id: " << info.plugin_id
+		<< ", pointer: "   << d << logend;
+}
+
+
+
+void RemoveSession(PluginInfo & info)
+{
+	log << log1 << "deleting stats plugin data"
+		<< ", plugin id: " << info.plugin_id
+		<< ", pointer: " << info.plugin_data_base << logend;
+
+	delete info.plugin_data_base;
+}
+
+
+
+void ReadConfig()
+{
+	stats_file = config.Text("stats_file");
+	req_save_freq = config.Int("stats_req_save_freq", req_save_freq);
+
+	if( stats_file.empty() )
+		log << log1 << "you should set stats_file in your config to keep statistics between restarting winix" << logend;
+	else
+		log << log2 << "stats_file: " << stats_file << logend;
+
+	stats_start = time(0); // it will be overwritten if the config file exists
+	ReadStats();
+}
+
+
+void Close()
+{
+	SaveStats();
+}
+
+
+void RemoveItem(long id)
+{
+	std::map<long, Stats>::iterator i = stats_tab.find(id);
+
+	if( i == stats_tab.end() )
+		return;
+
+	stats_tab.erase(i);
+	log << log3 << "Stats: removed stats for item.id: " << id << logend;
+}
+
+
+
+void RemoveFile(PluginInfo & info)
+{
+	RemoveItem(info.l1);
+}
+
+
+void RemoveDir(PluginInfo & info)
+{
+Db::ItemQuery query;
+std::vector<long> items;
+size_t i;
+
+	query.SetAll(false, false);
+	query.WhereParentId(info.l1);
+	db.GetItems(items, query);
+
+	// removing childs
+	for(i=0 ; i<items.size() ; ++i)
+		RemoveItem(items[i]);
+
+	// removing the directory
+	RemoveItem(info.l1);
+}
+
+
+} // namespace
+
+
+
+void Init(PluginInfo & info)
+{
+using namespace Stats;
+
+	plugin.Assign(WINIX_TEMPLATES_CREATEFUNCTIONS,	CreateFunctions);
+	plugin.Assign(WINIX_CONTENT_MAKE,				ContentMake);
+	plugin.Assign(WINIX_SESSION_CREATED,			SessionCreated);
+	plugin.Assign(WINIX_SESSION_REMOVE,				RemoveSession);
+	plugin.Assign(WINIX_PLUGIN_INIT,				ReadConfig);
+	plugin.Assign(WINIX_CLOSE,						Close);
+	plugin.Assign(WINIX_FILE_REMOVED,				RemoveFile);
+	plugin.Assign(WINIX_DIR_PREPARE_TO_REMOVE,		RemoveDir);
+
+	info.p1 = (void*)plugin_name;
+}
+
+