/// <summary>
/// Construct a new language excerpt
/// </summary>
/// <param name="word"></param>
/// <param name="sourceLanguage">The source language to draw from</param>
/// <param name="displayedSyllables">The number of displayed syllables</param>
/// <param name="random">The random number generator to use</param>
public LanguageExcerpt(TransmissionWord word, ACryptoLanguage sourceLanguage, int displayedSyllables, System.Random random)
{
SourceLanguage = sourceLanguage;
usedSyllableIndices = new byte[displayedSyllables];
for (int i = 0; i < displayedSyllables; i++)
{
usedSyllableIndices[i] = 255;
}
List <byte> indexList = new List <byte>(SourceLanguage.syllableCount - word.syllableIndices.Length);
for (byte i = 0; i < SourceLanguage.syllableCount; i++)
{
if (!word.syllableIndices.Contains(i))
{
indexList.Add(i);
}
}
var syllableIndex = 0;
for (int i = 0; i < word.syllableIndices.Length; i++)
{
if (!usedSyllableIndices.Contains(word.syllableIndices[i]))
{
usedSyllableIndices[syllableIndex] = word.syllableIndices[i];
syllableIndex++;
}
}
for (int i = syllableIndex; i < displayedSyllables; i++)
{
var index = random.Next(indexList.Count);
usedSyllableIndices[i] = indexList[index];
indexList.RemoveAt(index);
}
for (int i = 0; i < word.syllableIndices.Length; i++)
{
for (byte j = 0; j < usedSyllableIndices.Length; j++)
{
if (word.syllableIndices[i] == usedSyllableIndices[j])
{
word.syllableIndices[i] = j;
break;
}
}
}
}
/// <summary>
/// Construct a new language excerpt
/// </summary>
/// <param name="sourceLanguage">The source language to draw from</param>
/// <param name="displayedSyllables">The number of displayed syllables</param>
/// <param name="random">The random number generator to use</param>
public LanguageExcerpt(ACryptoLanguage sourceLanguage, int displayedSyllables, System.Random random)
{
SourceLanguage = sourceLanguage;
usedSyllableIndices = new byte[displayedSyllables];
List <byte> indexList = new List <byte>(SourceLanguage.syllableCount);
for (byte i = 0; i < SourceLanguage.syllableCount; i++)
{
indexList.Add(i);
}
for (int i = 0; i < displayedSyllables; i++)
{
var index = random.Next(indexList.Count);
usedSyllableIndices[i] = indexList[index];
indexList.RemoveAt(index);
}
}
/// <summary>
/// Initialises the transmission chain
/// </summary>
/// <param name="seed">The random seed</param>
/// <param name="transmissionCount">The number of transmissions</param>
/// <param name="wordLength">The number of syllables the current word has</param>
/// <param name="displayedSyllables">The number of syllables to display as possibilities</param>
/// <returns>The transmission setup</returns>
public static TransmissionSetup BuildTransmissionSetup(int seed, byte transmissionCount, int wordLength, int displayedSyllables)
{
var random = new System.Random(seed);
var endpoint = WordManager.Instance.CreateEndpoint(wordLength, displayedSyllables, random);
var transmissions = new Transmission[transmissionCount];
List <ACryptoLanguage> buffer = new List <ACryptoLanguage>(LanguageSet);
var usedLanguages = new ACryptoLanguage[transmissionCount];
var excerpts = new LanguageExcerpt[transmissionCount];
for (int i = 0; i < transmissionCount; i++)
{
var index = random.Next(buffer.Count);
usedLanguages[i] = buffer[index];
excerpts[i] = new LanguageExcerpt(usedLanguages[i], displayedSyllables, random);
buffer.RemoveAt(index);
if (i > 0)
{
transmissions[i - 1] = new Transmission(
excerpts[i - 1],
excerpts[i],
random,
displayedSyllables);
}
}
transmissions[transmissionCount - 1] = new Transmission(
excerpts[transmissionCount - 1],
endpoint.HumanLanguage,
random,
displayedSyllables);
var startWord = endpoint.RealWord;
for (int i = transmissionCount - 1; i > -1; i--)
{
startWord = transmissions[i].Encrypt(startWord);
}
Setup = new TransmissionSetup(startWord, endpoint, transmissions);
return(Setup);
}
