/// <summary>
/// Returns null in case of notfound anything or what ever
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
SortedDictionary <string, WordDefinition> GetWordsDefinitionFromText(string text, TextSearchStorageOptions opt)
{
SortedDictionary <string, WordDefinition> wordsCounter = new SortedDictionary <string, WordDefinition>();
try
{
if (String.IsNullOrEmpty(text))
{
return(wordsCounter);
}
StringBuilder sb = new StringBuilder();
string word = "";
WordDefinition wordDefinition = null;
//Support for previous versions without FullTextOnly
if (!opt.FullTextOnly && opt.SearchWordMinimalLength == 0)
{
opt.FullTextOnly = true;
opt.SearchWordMinimalLength = 2;
}
Action processWord = () =>
{
//We take all words, so we can later find even by email address [email protected] ... we will need jj and gmx.net
if (sb.Length > 0 && sb.Length >= opt.SearchWordMinimalLength)
{
word = sb.ToString().ToLower();
List <string> wrds = new List <string>();
wrds.Add(word);
int i = 1;
if (!opt.FullTextOnly) //If equals to 0, we store only words for full text search
{
while (word.Length - i >= opt.SearchWordMinimalLength)
{
wrds.Add(word.Substring(i));
i++;
}
}
// System.Diagnostics.Debug.WriteLine("--------------");
foreach (var w in wrds)
{
//System.Diagnostics.Debug.WriteLine(w);
if (wordsCounter.TryGetValue(w, out wordDefinition))
{
wordDefinition.CountInDocu++;
}
else
{
wordDefinition = new WordDefinition()
{
CountInDocu = 1
};
wordsCounter[w] = wordDefinition;
}
}
}
if (sb.Length > 0)
{
sb.Remove(0, sb.Length);
}
//sb.Clear();
};
int wordLen = 0;
int maximalWordLengthBeforeSplit = 50;
foreach (var c in text)
{
//No words reviews (must be checked in outer systems)
if (c != ' ')
{
sb.Append(c);
wordLen++;
if (wordLen >= maximalWordLengthBeforeSplit)
{
//Processing ready word
processWord();
wordLen = 0;
}
}
else
{
//Processing ready word
processWord();
wordLen = 0;
}
//---REVIEW ON START
//if (c == '-' || c == '@') //Complex names or email address inside
// continue;
//if (Char.IsLetterOrDigit(c) || Char.IsSymbol(c))
//{
// sb.Append(c);
// wordLen++;
// if (wordLen >= maximalWordLengthBeforeSplit)
// {
// //Processing ready word
// processWord();
// wordLen = 0;
// }
//}
//else
//{
// //Processing ready word
// processWord();
// wordLen = 0;
//}
//---REVIEW ON STOP
}
//Processing last word
processWord();
//if (wordsCounter.Count() > 0)
// return wordsCounter;
}
catch (System.Exception ex)
{
}
return(wordsCounter);
}
/// <summary>
///
/// </summary>
/// <param name="tran"></param>
/// <param name="tableName">Search document space/physical dbreeze table, that's why must be synchronized</param>
/// <param name="documentId"></param>
/// <param name="searchables"></param>
/// <param name="opt"></param>
/// <param name="iMode"></param>
public void InsertDocumentText(Transaction tran, string tableName, byte[] documentId, string searchables, TextSearchStorageOptions opt, eInsertMode iMode)
{
//tran._transactionUnit.TransactionsCoordinator._engine.Configuration.
if (String.IsNullOrEmpty(tableName) || documentId == null)
{
return;
}
if ((iMode == eInsertMode.Append || iMode == eInsertMode.Remove) && String.IsNullOrEmpty(searchables))
{
return;
}
SortedDictionary <string, WordDefinition> pST = this.GetWordsDefinitionFromText(searchables, opt); //flattend searchables
StringBuilder sbPs = new StringBuilder();
//Registering all tables for text-search in current transaction
ITS its = null;
if (!itbls.TryGetValue(tableName, out its))
{
its = new ITS()
{
e2i = tran.InsertTable <byte>(tableName, 1, 0),
i2e = tran.InsertTable <byte>(tableName, 2, 0),
srch = tran.InsertTable <byte>(tableName, 3, 0),
};
its.e2i.ValuesLazyLoadingIsOn = false;
its.i2e.ValuesLazyLoadingIsOn = false;
its.srch.ValuesLazyLoadingIsOn = false;
itbls.Add(tableName, its);
}
//Internal document ID
int iId = 0;
//Searching document by externalID
var r1 = its.e2i.Select <byte[], int>(documentId);
if (r1.Exists) //DOCUMENT EXISTS
{
iId = r1.Value;
//Getting old searchables for this document
byte[] oldSrch = its.srch.Select <byte[], byte[]>(iId.To_4_bytes_array_BigEndian().Concat(new byte[] { 0 }), true).Value;
HashSet <string> oldSearchables = GetSearchablesFromByteArray_AsHashSet(oldSrch); //always instantiated hashset
switch (iMode)
{
case eInsertMode.Insert:
//Comparing
if (oldSearchables.Intersect(pST.Keys).Count() == oldSearchables.Count)
{
return; //Going out, nothing to insert
}
foreach (var ps1i in pST)
{
sbPs.Append(ps1i.Key);
sbPs.Append(" ");
}
break;
case eInsertMode.Append:
case eInsertMode.Remove:
if ((iMode == eInsertMode.Append) && oldSearchables.Intersect(pST.Keys).Count() == oldSearchables.Count)
{
return; //Going out, nothing to insert
}
foreach (var ew in pST.Keys)
{
if (iMode == eInsertMode.Append)
{
oldSearchables.Add(ew);
}
else
{
oldSearchables.Remove(ew);
}
}
foreach (var el in oldSearchables)
{
sbPs.Append(el);
sbPs.Append(" ");
}
break;
}
}
else
{ //DOCUMENT NEW
if (pST.Count < 1)
{
return; //Going out, nothing to insert
}
//Document is new
if (iMode == eInsertMode.Append)
{
iMode = eInsertMode.Insert;
}
else if (iMode == eInsertMode.Remove)
{
return; //Going out
}
iId = its.i2e.Max <int, byte[]>().Key;
iId++;
its.e2i.Insert <byte[], int>(documentId, iId);
its.i2e.Insert <int, byte[]>(iId, documentId);
foreach (var ps1i in pST)
{
sbPs.Append(ps1i.Key);
sbPs.Append(" ");
}
}
this.InsertWasPerformed = true;
//Inserting into affected table
if (!opt.DeferredIndexing)
{
its.ChangedDocIds.Add(iId);
}
else
{
if (!defferedDocIds.ContainsKey(tableName))
{
defferedDocIds[tableName] = new HashSet <uint>();
}
defferedDocIds[tableName].Add((uint)iId);
}
//Inserting searchables to be indexed
its.srch.Insert <byte[], byte[]>(iId.To_4_bytes_array_BigEndian().Concat(new byte[] { 1 }), GetByteArrayFromSearchbles(sbPs.ToString()));
}
