// recover the UTC datetime that was in the original ZonedEvent,
// used by CalendarRenderer.RenderJson
public static ZonelessEvent UniversalFromLocalAndTzinfo(ZonelessEvent evt, TimeZoneInfo tzinfo)
{
var _dts = evt.dtstart;
var _dtstart = new DateTime(_dts.Year, _dts.Month, _dts.Day, _dts.Hour, _dts.Minute, _dts.Second);
evt.dtstart = TimeZoneInfo.ConvertTimeToUtc(_dtstart, tzinfo);
if (evt.dtend != null)
{
var _dte = evt.dtend;
var _dtend = new DateTime(_dte.Year, _dte.Month, _dte.Day, _dte.Hour, _dte.Minute, _dte.Second);
evt.dtend = TimeZoneInfo.ConvertTimeToUtc(_dtend, tzinfo);
}
return(evt);
}
public static bool SimilarButNonIdenticalUrls(ZonelessEvent evt1, ZonelessEvent evt2, int min_length)
{
if (evt1.url == null || evt1.url.Length < min_length || evt2.url == null || evt2.url.Length < min_length)
{
return(false);
}
if (evt1.url.Substring(0, min_length) == evt2.url.Substring(0, min_length))
{
if (evt1.url != evt2.url)
{
return(true);
}
}
return(false);
}
// take a string representation of a set of events, in some format
// take a per-event renderer for that format
// take an event object
// call the renderer to add the event object to the string representation
// currently uses: RenderEvtAsHtml, RenderEvtAsXml
private void AppendEvent(StringBuilder eventstring, EventRenderer event_renderer, ZonelessEvent evt, Dictionary<string,object> args)
{
eventstring.Append(event_renderer(evt, this.calinfo, args ) );
}
private static void UpdateSourcesDict(Dictionary<string, int> sources_dict, TimeOfDay current_time_of_day, ZonelessEvent evt, string datekey)
{
var source_key = MakeSourceKey(current_time_of_day, datekey, evt);
sources_dict.IncrementOrAdd(source_key);
}
public static bool IsZeroHourMinSec(ZonelessEvent evt)
{
return (evt.dtstart.Hour == 0 && evt.dtstart.Minute == 0 && evt.dtstart.Second == 0);
}
public static bool FeedComesFrom(ZonelessEvent evt, string source)
{
if (evt.source.StartsWith(source))
return true;
foreach (var url_and_source in evt.urls_and_sources)
if (url_and_source.Value.StartsWith(source))
return true;
return false;
}
public string RenderEvtAsHtml(ZonelessEvent evt, Calinfo calinfo, Dictionary<string,object> args)
{
if (evt.urls_and_sources == null)
evt.urls_and_sources = new Dictionary<string, string>() { { evt.url, evt.source } };
string dtstart;
if (evt.allday && evt.dtstart.Hour == 0)
dtstart = " ";
else
dtstart = evt.dtstart.ToString("ddd hh:mm tt");
var month_day = evt.dtstart.ToString("M/d");
string categories = "";
List<string> catlist_links = new List<string>();
if (!String.IsNullOrEmpty(evt.categories))
{
List<string> catlist = evt.categories.Split(',').ToList();
foreach (var cat in catlist)
{
var category_url = string.Format("/{0}/html?view={1}", this.id, cat);
catlist_links.Add(string.Format(@"<a title=""open the {1} view"" href=""{0}"">{1}</a>", category_url, cat));
}
categories = string.Format(@" <span class=""cat"">{0}</span>", string.Join(", ", catlist_links.ToArray()));
}
string label = "e" + this.event_counter.ToString();
String description = ( String.IsNullOrEmpty(evt.description) || evt.description.Length < 10 ) ? "" : evt.description.UrlsToLinks();
string show_desc = ( ! String.IsNullOrEmpty(description) ) ? String.Format(@"<span class=""sd""><a title=""show description ({0} chars)"" href=""javascript:show_desc('{1}')"">...</a></span>", description.Length, label) : "";
if (args.ContainsKey("inline_descriptions") && (bool)args["inline_descriptions"] == true) // for view_calendar
{
var location = string.IsNullOrEmpty(evt.location) ? "" : String.Format("{0}<br/><br/>", evt.location);
show_desc = String.Format(@"<div style=""text-indent:0""><p>{0}</div>", location + description);
}
if (args.ContainsKey("show_desc") && (bool)args["show_desc"] == false) // in case need to suppress, not used yet
show_desc = "";
string add_to_cal = String.Format(@"<span class=""atc""><a title=""add to calendar"" href=""javascript:add_to_cal('{0}')"">+</a></span>", label);
if (args.ContainsKey("add_to_cal") && (bool)args["add_to_cal"] == false) // for view_calendar
add_to_cal = "";
string visibility = "";
string more = "";
string source_key = "";
string source_attr = "";
int sequence_count = 1;
int sequence_position = 1;
string show_more_call;
if (evt.urls_and_sources.Count == 1)
{
source_attr = MakeSourceAttr(evt);
sequence_count = (int)args["sequence_count"];
source_key = (string)args["source_key"];
sequence_position = (int)args["sequence_position"];
}
visibility = (sequence_count > 1 && sequence_position > 1) ? @" style=""display:none"" " : "";
if (sequence_count > 1 && sequence_position == 1)
{
show_more_call = "javascript:show_more('" + source_key + "')";
more = string.Format(@" <span class=""{0}""><a title=""show {2} more from {3}"" href=""{1}"">show {2} more</a></span>",
source_key,
show_more_call,
sequence_count - 1,
evt.source
);
}
else
{
more = "";
}
var html = string.Format(
@"<a name=""{0}""></a>
<div id=""{0}"" class=""bl {10} {12}"" {13} xmlns:v=""http://rdf.data-vocabulary.org/#"" typeof=""v:Event"" >
<span class=""md"">{14}</span>
<span class=""st"" property=""v:startDate"" content=""{1}"">{2}</span>
<span href=""{3}"" rel=""v:url""></span>
<span class=""ttl"">{4}</span>
<span class=""src"" property=""v:description"">{5}</span> {6}
{7}
{8}
{9}
{11}
</div>",
label, // 0
String.Format("{0:yyyy-MM-ddTHH:mm}", evt.dtstart), // 1
dtstart, // 2
evt.url, // 3
MakeTitleForRDFa(evt), // 4
evt.urls_and_sources.Keys.Count == 1 ? evt.source : "", // 5 suppress source if multiple
categories, // 6
MakeGeoForRDFa(evt), // 7
show_desc, // 8
add_to_cal, // 9
source_attr, // 10
more, // 11
source_key, // 12
visibility, // 13
month_day // 14
);
this.event_counter += 1;
return html;
}
// render a single event as an xml element
private string RenderEvtAsXml(ZonelessEvent evt, Calinfo calinfo, Dictionary<string,object> args)
{
var xml = new StringBuilder();
xml.Append("<event>\n");
xml.Append(string.Format("<title>{0}</title>\n", HttpUtility.HtmlEncode(evt.title)));
xml.Append(string.Format("<url>{0}</url>\n", HttpUtility.HtmlEncode(evt.url)));
xml.Append(string.Format("<source>{0}</source>\n", HttpUtility.HtmlEncode(evt.source)));
xml.Append(string.Format("<dtstart>{0}</dtstart>\n", evt.dtstart.ToString(DATETIME_FORMAT_FOR_XML)));
if (evt.dtend != null)
xml.Append(string.Format("<dtend>{0}</dtend>\n", evt.dtend.ToString(DATETIME_FORMAT_FOR_XML)));
xml.Append(string.Format("<allday>{0}</allday>\n", evt.allday));
xml.Append(string.Format("<categories>{0}</categories>\n", HttpUtility.HtmlEncode(evt.categories)));
xml.Append(string.Format("<description>{0}</description>\n", HttpUtility.HtmlEncode(evt.description)));
xml.Append(string.Format("<location>{0}</location>\n", HttpUtility.HtmlEncode(evt.location)));
var lat = ! String.IsNullOrEmpty(evt.lat) ? evt.lat : "";
var lon = ! String.IsNullOrEmpty(evt.lon) ? evt.lon : "";
xml.Append(string.Format("<lat>{0}</lat>\n", lat));
xml.Append(string.Format("<lon>{0}</lon>\n", lon));
xml.Append("</event>\n");
return xml.ToString();
}
public static string MakeTitleForRDFa(ZonelessEvent evt, string dom_id, Dictionary<string,object> args)
{
var is_eventsonly = args.HasValue("eventsonly", true);
var coalesced_links = BuildCoalescedLinks(evt, dom_id);
bool is_coalesced = !String.IsNullOrEmpty(coalesced_links);
// case 1: eventsonly, coalesced
// <span class="ttl"><a target="elmcity" property="v:summary" title="open event page on source site" href="http://www.harriscenter.org/calendar">Homeschool Program: Biographies of Famous Birds</a></span>
//
// case 2: eventsonly, not coalesced
// <span class="ttl"><span property="v:summary">Crazy Quilters</span> [<a target="elmcity" title="gilsum church" href="http://gilsum.org/church.aspx"> 1 </a><a target="elmcity" title="town of gilsum" href="http://gilsum.org/"> 2 </a>]</span>
//
// case 3: not eventsonly, coalesced
// <span class="ttl"><span property="v:summary"><a href="javascript:show_desc('e3')">Crazy Quilters</a></span> [<a title="gilsum church" href="http://gilsum.org/church.aspx"> 1 </a><a title="town of gilsum" href="http://gilsum.org/"> 2 </a>]</span>
//
// case 4: not eventsonly, not coalesced
// <span class="ttl"><a property="v:summary" title="see details" href='javascript:show_desc("e2")'>Lunchtime Rallies at Central Square</a></span>
// <span class="ttl"><span property="v:summary">Crazy Quilters</span> [<a target="elmcity" title="gilsum church" href="http://gilsum.org/church.aspx"> 1 </a><a target="elmcity" title="town of gilsum" href="http://gilsum.org/"> 2 </a>]</span>
// otherwise this
// <span class="ttl"><span property="v:summary"><a href="javascript:show_desc('e3')">Crazy Quilters</a></span> [<a title="gilsum church" href="http://gilsum.org/church.aspx"> 1 </a><a title="town of gilsum" href="http://gilsum.org/"> 2 </a>]</span>
TitleType title_type;
if (is_coalesced)
title_type = is_eventsonly ? TitleType.EventsOnlyCoalesced : TitleType.NotEventsOnlyCoalesced;
else
title_type = is_eventsonly ? TitleType.EventsOnlyNotCoalesced : TitleType.NotEventsOnlyNotCoalesced;
string title;
if ( title_type == TitleType.EventsOnlyCoalesced )
title = string.Format("<span property=\"v:summary\">{0}</span>", evt.title);
else
title = string.Format("<a property=\"v:summary\" title=\"{0}\" href=\"{1}\">{2}</a>",
is_eventsonly ? "open event page on source site": "see details",
is_eventsonly ? evt.url : string.Format("javascript:show_desc('{0}')", dom_id),
evt.title);
if (is_coalesced)
title += coalesced_links;
return title;
}
private static string MassageDescription(ZonelessEvent evt)
{
string description = "";
if (!String.IsNullOrEmpty(evt.description) )
description = evt.description.Replace("'", "\\'").Replace("\n", "<br>").Replace("\r", "");
string location = "";
if (!String.IsNullOrEmpty(evt.location))
location = String.Format(@"<p class=""elmcity_info_para""><b>Location</b>: {0}</p>", evt.location.Replace("'", "\\'")).Replace("\n", " ").Replace("\r", "");
description = ("<span class=\"desc\">" + location + @"<p class=""elmcity_info_para""><b>Description</b>: " + description + "</p></span>").UrlsToLinks();
return description;
}
private string MakeGeoForRDFa(ZonelessEvent evt)
{
string geo = "";
if (evt.lat != null && evt.lon != null)
geo = string.Format(
@"<span rel=""v:location"">
<span rel=""v:geo"">
<span typeof=""v:Geo"">
<span property=""v:latitude"" content=""{0}"" ></span>
<span property=""v:longitude"" content=""{1}"" ></span>
</span>
</span>
</span>",
evt.lat,
evt.lon
);
return geo;
}
private static string BuildCoalescedLinks(ZonelessEvent evt, string dom_id)
{
if (evt.urls_and_sources.Keys.Count == 1) // nothing to coalesce
return "";
string coalesced_links = " [";
int count = 0;
foreach (var url in evt.urls_and_sources.Keys)
{
var source = evt.urls_and_sources[url];
count++;
coalesced_links += string.Format(@"<a target=""{0}"" title=""{1}"" href=""{2}""> {3} </a>",
Configurator.default_html_window_name,
source,
url,
count);
}
coalesced_links += "]";
return coalesced_links;
}
public void AddEvent(string title, string url, string source, string lat, string lon, DateTime dtstart, DateTime dtend, bool allday, string categories, string description, string location)
{
var evt = new ZonelessEvent(title: title, url: url, source: source, dtstart: dtstart, dtend: dtend, lat: lat, lon: lon, allday: allday, categories: categories, description: description, location: location);
evt.NormalizeTitle();
this.events.Add(evt);
}
// recover the UTC datetime that was in the original ZonedEvent,
// used by CalendarRenderer.RenderJson
public static ZonelessEvent UniversalFromLocalAndTzinfo(ZonelessEvent evt, TimeZoneInfo tzinfo)
{
var _dts = evt.dtstart;
var _dtstart = new DateTime(_dts.Year, _dts.Month, _dts.Day, _dts.Hour, _dts.Minute, _dts.Second);
evt.dtstart = TimeZoneInfo.ConvertTimeToUtc(_dtstart, tzinfo);
if (evt.dtend != null)
{
var _dte = evt.dtend;
var _dtend = new DateTime(_dte.Year, _dte.Month, _dte.Day, _dte.Hour, _dte.Minute, _dte.Second);
evt.dtend = TimeZoneInfo.ConvertTimeToUtc(_dtend, tzinfo);
}
return evt;
}
private string MakeGeoForRDFa(ZonelessEvent evt)
{
string geo = "";
if (this.calinfo.hub_enum == HubType.where)
geo = string.Format(
@"<span rel=""v:location"">
<span rel=""v:geo"">
<span typeof=""v:Geo"">
<span property=""v:latitude"" content=""{0}"" ></span>
<span property=""v:longitude"" content=""{1}"" ></span>
</span>
</span>
</span>",
evt.lat != null ? evt.lat : this.calinfo.lat,
evt.lon != null ? evt.lon : this.calinfo.lon
);
return geo;
}
public string RenderEvtAsCsv(ZonelessEvent evt, Calinfo calinfo, Dictionary<string, object> args)
{
var line = (string) args["csv_fields_template"];
var date_fmt = "yyyy-MM-dd";
var time_fmt = "hh:mm:ss";
line = line.Replace("__title__", evt.title.EscapeValueForCsv());
line = line.Replace("__start_day__", evt.dtstart.ToString(date_fmt));
line = line.Replace("__start_time__", evt.dtstart.ToString(time_fmt));
if (evt.dtend != DateTime.MinValue)
{
line = line.Replace("__stop_day__", evt.dtstart.ToString(date_fmt));
line = line.Replace("__stop_time__", evt.dtstart.ToString(time_fmt));
}
else
{
line = line.Replace("__stop_day__", "");
line = line.Replace("__stop_time__", "");
}
line = line.Replace("__uid__", evt.hash);
line = line.Replace("__description__", evt.description.EscapeValueForCsv());
line = line.Replace("__location__", evt.location.EscapeValueForCsv());
line = line.Replace("__url__", evt.url.ToString().EscapeValueForCsv());
line = line.Replace("__categories__", evt.categories.EscapeValueForCsv());
return line + "\n";
}
// render a single event as an xml element
private string RenderEvtAsXml(ZonelessEvent evt, Calinfo calinfo, Dictionary<string,object> args)
{
var xml = new StringBuilder();
xml.Append("<event>\n");
xml.Append(string.Format("<title>{0}</title>\n", HttpUtility.HtmlEncode(evt.title)));
xml.Append(string.Format("<url>{0}</url>\n", HttpUtility.HtmlEncode(evt.url)));
xml.Append(string.Format("<source>{0}</source>\n", HttpUtility.HtmlEncode(evt.source)));
xml.Append(string.Format("<dtstart>{0}</dtstart>\n", evt.dtstart.ToString(DATETIME_FORMAT_FOR_XML)));
if (evt.dtend != null)
xml.Append(string.Format("<dtend>{0}</dtend>\n", evt.dtend.ToString(DATETIME_FORMAT_FOR_XML)));
xml.Append(string.Format("<allday>{0}</allday>\n", evt.allday));
xml.Append(string.Format("<categories>{0}</categories>\n", HttpUtility.HtmlEncode(evt.categories)));
xml.Append(string.Format("<description>{0}</description>\n", HttpUtility.HtmlEncode(evt.description)));
xml.Append(string.Format("<location>{0}</location>\n", HttpUtility.HtmlEncode(evt.location)));
//if (this.calinfo.hub_type == HubType.where.ToString())
if (calinfo.hub_enum == HubType.where)
{
var lat = evt.lat != null ? evt.lat : this.calinfo.lat;
var lon = evt.lon != null ? evt.lon : this.calinfo.lon;
xml.Append(string.Format("<lat>{0}</lat>\n", lat));
xml.Append(string.Format("<lon>{0}</lon>\n", lon));
}
xml.Append("</event>\n");
return xml.ToString();
}
public string RenderEvtAsHtml(ZonelessEvent evt, Calinfo calinfo, Dictionary<string,object> args)
{
if (evt.urls_and_sources == null)
evt.urls_and_sources = new Dictionary<string, string>() { { evt.url, evt.source } };
string dtstart;
if (evt.allday && evt.dtstart.Hour == 0)
dtstart = " ";
else
dtstart = evt.dtstart.ToString("ddd hh:mm tt");
var month_day = evt.dtstart.ToString("M/d");
string categories = "";
List<string> catlist_links = new List<string>();
if (!String.IsNullOrEmpty(evt.categories))
{
List<string> catlist = Utils.GetTagListFromTagString(evt.categories);
if (args.ContainsKey("hub_tags") ) // exclude autogenerated hub names
{
var hub_tags = (List<string>)args["hub_tags"];
catlist = catlist.FindAll(c => hub_tags.Contains(c) == false);
}
// catlist = catlist.FindAll(c => c.Contains("{") == false); // don't show squiggly tags inline?
// actually leave them in so client can show related images. curator can suppress display if desired using css
foreach (var cat in catlist)
{
var category_url = string.Format("javascript:show_view('{0}')", cat);
catlist_links.Add(string.Format(@"<a title=""open the {1} view"" href=""{0}"">{1}</a>", category_url, cat));
}
categories = string.Format(@" <span class=""cat"">{0}</span>", string.Join(", ", catlist_links.ToArray()));
}
String description = ( String.IsNullOrEmpty(evt.description) || evt.description.Length < 10 ) ? "" : evt.description.UrlsToLinks();
string dom_id = "e" + evt.uid;
string expander = "";
if ( ! String.IsNullOrEmpty(description) && args.HasValue("eventsonly",true) )
expander = String.Format(@"<span class=""sd""><a title=""show description"" href=""javascript:show_desc('{0}')"">...</a></span>", dom_id);
string add_to_cal = String.Format(@"<span class=""atc""><a title=""add to calendar"" href=""javascript:add_to_cal('{0}')"">+</a></span>", dom_id);
if ( args.HasValue("add_to_cal",false) ) // for view_calendar
add_to_cal = "";
string visibility = "";
string more = "";
string source_key = "";
//string source_attr = ""; // not needed,
int sequence_count = 1;
int sequence_position = 1;
string show_more_call;
if (evt.urls_and_sources.Count == 1)
{
sequence_count = (int)args["sequence_count"];
source_key = (string)args["source_key"];
sequence_position = (int)args["sequence_position"];
}
visibility = (sequence_count > 1 && sequence_position > 1) ? @" style=""display:none"" " : "";
if (sequence_count > 1 && sequence_position == 1)
{
show_more_call = "javascript:show_more('" + source_key + "')";
more = string.Format(@" <span class=""{0}""><a title=""show {2} more from {3}"" href=""{1}"">show {2} more</a></span>",
source_key,
show_more_call,
sequence_count - 1,
evt.source
);
}
else
{
more = "";
}
var html = string.Format(
@"<div id=""{0}"" class=""bl {12}"" {13} xmlns:v=""http://rdf.data-vocabulary.org/#"" typeof=""v:Event"" >
<span style=""display:none"" class=""uid"">{15}</span>
<span style=""display:none"" class=""hash"">{16}</span>
<span class=""md"">{14}</span>
<span class=""st"" property=""v:startDate"" content=""{1}"">{2}</span>
<span href=""{3}"" rel=""v:url""></span>
<span class=""ttl"">{4}</span>
<span class=""src"" property=""v:description"">{5}</span> {6}
{7}
{8}
{9}
{11}
</div>",
dom_id, // 0
String.Format("{0:yyyy-MM-ddTHH:mm}", evt.dtstart), // 1
dtstart, // 2
evt.url, // 3
MakeTitleForRDFa(evt, dom_id, args), // 4
evt.urls_and_sources.Keys.Count == 1 ? evt.source : "", // 5 suppress source if multiple
categories, // 6
MakeGeoForRDFa(evt), // 7
expander, // 8
add_to_cal, // 9
"", // 10 was source_attr, not needed
more, // 11
source_key, // 12
visibility, // 13
month_day, // 14
evt.uid, // 15
evt.hash // 16
);
this.event_counter += 1;
return html;
}
public static string MakeTitleForRDFa(ZonelessEvent evt)
{
if (evt.urls_and_sources.Keys.Count == 1)
{
return string.Format("<a target=\"{0}\" property=\"v:summary\" title=\"{1}\" href=\"{2}\">{3}</a>",
Configurator.default_html_window_name,
//evt.source,
"open event page on source site",
evt.url,
evt.title);
}
if (evt.urls_and_sources.Keys.Count > 1)
{
var evt_title = @"<span property=""v:summary"">" + evt.title + "</span> [";
int count = 0;
foreach (var url in evt.urls_and_sources.Keys )
{
var source = evt.urls_and_sources[url];
count++;
evt_title += string.Format(@"<a target=""{0}"" title=""{1}"" href=""{2}""> {3} </a>",
Configurator.default_html_window_name,
source,
url,
count);
}
evt_title += "]";
return evt_title;
}
GenUtils.PriorityLogMsg("warning", "MakeTitleForRDFa: no title", null);
return "";
}
// render a single event as text
public string RenderEvtAsText(ZonelessEvent evt, Calinfo calinfo, Dictionary<string, object> args)
{
var text = new StringBuilder();
text.AppendLine(evt.title);
var start = evt.dtstart.ToString("M/d/yyyy h:m tt").Replace(":0 ", " ");
text.AppendLine(start);
if ( ! String.IsNullOrEmpty(evt.source) )
text.AppendLine(evt.source);
if ( ! String.IsNullOrEmpty(evt.location) )
text.AppendLine(evt.location);
if ( ! String.IsNullOrEmpty(evt.description) && evt.description != evt.location)
text.AppendLine(evt.description);
text.AppendLine();
return text.ToString();
}
public string RenderEvtAsListItem(ZonelessEvent evt)
{
if (evt.urls_and_sources == null)
evt.urls_and_sources = new Dictionary<string, string>() { { evt.url, evt.source } };
string dtstart;
if (evt.allday && evt.dtstart.Hour == 0)
dtstart = "";
else
dtstart = evt.dtstart.ToString("ddd hh:mm tt");
return string.Format(@"<li>{0} <a href=""{1}"">{2}</a> {3}</li>",
dtstart,
evt.urls_and_sources.First().Key,
evt.title,
evt.urls_and_sources.First().Value);
}
private static string MakeSourceAttr(ZonelessEvent evt)
{
var re_source_attr = new Regex(@"[^\w]+");
return re_source_attr.Replace(evt.source, "");
}
public void AddEvent(string title, string url, string source, string lat, string lon, DateTime dtstart, DateTime dtend, bool allday, string categories, string description, string location)
{
var evt = new ZonelessEvent(title: title, url: url, source: source, dtstart: dtstart, dtend: dtend, lat: lat, lon: lon, allday: allday, categories: categories, description: description, location: location);
this.events.Add(evt);
}
private static string MakeSourceKey(TimeOfDay current_time_of_day, string datekey, ZonelessEvent evt)
{
var source_attr = MakeSourceAttr(evt);
return source_attr + "_" + datekey + "_" + string.Format("{0:HHmm}", evt.dtstart);
}
public static bool IsZeroHourMinSec(ZonelessEvent evt)
{
return(evt.dtstart.Hour == 0 && evt.dtstart.Minute == 0 && evt.dtstart.Second == 0);
}
public static bool SimilarButNonIdenticalUrls(ZonelessEvent evt1, ZonelessEvent evt2, int min_length)
{
if (evt1.url == null || evt1.url.Length < min_length || evt2.url == null || evt2.url.Length < min_length )
return false;
if (evt1.url.Substring(0, min_length) == evt2.url.Substring(0, min_length))
if (evt1.url != evt2.url)
return true;
return false;
}
