private static void IncrementPhraseWindow(PhraseWindow phraseWindow)
{
string sqlConditions =
$"PrecedingWord3Id = {phraseWindow.PrecedingWord3Id.ToStringOrDefault()}" +
$" and PrecedingWord2Id = {phraseWindow.PrecedingWord2Id.ToStringOrDefault()}" +
$" and PrecedingWord1Id = {phraseWindow.PrecedingWord1Id.ToStringOrDefault()}" +
$" and SuggestedWordId = {phraseWindow.SuggestedWordId}";
int today = PersistenceService.DB.TodayAsInt();
string sql = $"Select ID from WordSequences where {sqlConditions} limit 1";
DataTable data = PersistenceService.DB.ExecuteQuery(sql);
if (data.Rows.Count == 0)
{
sql = "Insert into WordSequences(PrecedingWord3Id, PrecedingWord2Id, PrecedingWord1Id, SuggestedWordId, UsageCount, LastUsedDate)" +
$" values (" +
$" {phraseWindow.PrecedingWord3Id.ToStringOrDefault()}," +
$" {phraseWindow.PrecedingWord2Id.ToStringOrDefault()}," +
$" {phraseWindow.PrecedingWord1Id.ToStringOrDefault()}," +
$" {phraseWindow.SuggestedWordId}, 1, {today})";
}
else
{
sql = $"Update WordSequences set UsageCount = UsageCount + 1, LastUsedDate = {today} " +
$" where {sqlConditions}";
}
PersistenceService.DB.ExecuteNonQuery(sql);
}
/// <summary>
/// This method will run a 4 word sliding window across the sentence and update
/// the database so we can learn which word sequences the user uses most often.
/// For a 5 word sentence the entries will be
/// null, null, null, word1
/// null, null, word1, word2
/// null, word1, word2, word3
/// word1, word2, word3, word4
/// word2, word3, word4, word5
/// </summary>
/// <param name="wordIds"></param>
public static void IncrementPhraseUsage(IEnumerable <int> wordIds)
{
IEnumerable <PhraseWindow> phraseWindows = PhraseWindow.CreatePhraseWindows(wordIds);
foreach (PhraseWindow phraseWindow in phraseWindows)
{
IncrementPhraseWindow(phraseWindow);
}
}
public static IEnumerable <PhraseWindow> CreatePhraseWindows(IEnumerable <int> wordIds)
{
var result = new List <PhraseWindow>();
var suggestedWordId = wordIds.First();
wordIds = wordIds.Skip(1);
var wordWindow = new PhraseWindow(suggestedWordId);
result.Add(wordWindow);
foreach (int wordId in wordIds)
{
wordWindow = wordWindow.Next(wordId);
result.Add(wordWindow);
}
return(result);
}
