private bool TryGetKnownCost(Site site1, Site site2, out int?cost)
{
ConnectionCostCalculator.SitePairKey key = new ConnectionCostCalculator.SitePairKey(site1, site2);
Dictionary <ConnectionCostCalculator.SitePairKey, int?> dictionary = this.knownCosts;
return(dictionary.TryGetValue(key, out cost));
}
private bool TryCalculateConnectionCost(Site sourceSite, Site destinationSite, out int sourceToDestinationCost)
{
sourceToDestinationCost = int.MaxValue;
bool flag = false;
Dictionary <Site, int> dictionary = new Dictionary <Site, int>();
dictionary[sourceSite] = 0;
if (sourceSite.Equals(destinationSite))
{
sourceToDestinationCost = 0;
flag = true;
}
else
{
while (this.allSitesCount > dictionary.Count)
{
int num = 0;
Site site = null;
foreach (KeyValuePair <Site, int> keyValuePair in dictionary)
{
Site key = keyValuePair.Key;
foreach (SiteLink siteLink in key.SiteLinks)
{
foreach (Site site2 in siteLink.Sites)
{
if (!dictionary.ContainsKey(site2))
{
int num2 = siteLink.Cost + keyValuePair.Value;
if (site == null || num2 < num || (num2 == num && site2.Equals(destinationSite)))
{
site = site2;
num = num2;
}
}
}
}
}
if (site == null)
{
break;
}
dictionary[site] = num;
if (site.Equals(destinationSite))
{
sourceToDestinationCost = num;
flag = true;
break;
}
}
}
if (dictionary.Count > 0 || !flag)
{
Dictionary <ConnectionCostCalculator.SitePairKey, int?> dictionary2 = this.knownCosts;
Dictionary <ConnectionCostCalculator.SitePairKey, int?> dictionary3 = new Dictionary <ConnectionCostCalculator.SitePairKey, int?>(dictionary2);
foreach (KeyValuePair <Site, int> keyValuePair2 in dictionary)
{
Site key2 = keyValuePair2.Key;
ConnectionCostCalculator.SitePairKey key3 = new ConnectionCostCalculator.SitePairKey(sourceSite, key2);
dictionary3[key3] = new int?(keyValuePair2.Value);
}
if (!flag)
{
ConnectionCostCalculator.SitePairKey key4 = new ConnectionCostCalculator.SitePairKey(sourceSite, destinationSite);
dictionary3[key4] = null;
}
Interlocked.Exchange <Dictionary <ConnectionCostCalculator.SitePairKey, int?> >(ref this.knownCosts, dictionary3);
}
return(flag);
}
