// function that receives a card and a system and tells you whether they are compatible
public bool CheckForMatch(Card card, SystemCard system)
{
bool match = true; // true until proven false by tests below
// Step 1: See whether Sample Rate is adequate
if (system.DesiredContent == "Frequency")
{
// Card must have 2x signal frequency as its sample rate
if ((system.SignalFrequency * 2) > card.SampleRate)
{
match = false;
}
}
else if (system.DesiredContent == "Waveform")
{
// Card must have 10x signal frequency as its sample rate
if ((system.SignalFrequency * 10) > card.SampleRate)
{
match = false;
}
}
else if (system.DesiredContent == "Level")
{
// Card frequency does not matter
}
// Step 2: Check for ground loops
if (system.IsGrounded && (card.TerminalConfig == "Single-Ended"))
{
match = false;
}
// Step 3: Check for necessary Signal Conditioning
if ((system.SensorType == "Thermocouple") && (card.SignalConditioning != "CJC"))
{
match = false;
}
else if ((system.SensorType == "Strain Gauge") && (card.SignalConditioning != "Bridge"))
{
match = false;
}
else if ((system.SensorType == "IEPE Microphone") && (card.SignalConditioning != "IEPE"))
{
match = false;
}
// Step 4: Make sure signal Amplitude can be read
if (system.SignalAmplitude > card.MeasurementRange)
{
match = false;
}
return(match);
}
// Give a list of n sensors in a random order
public List <SystemCard> GenerateSystemList()
{
// get all records and convert them to models
SensorDatabase database = new SensorDatabase();
database.OpenConnection();
List <SensorRecord> records = database.RequestAllSensors();
List <SystemCard> cards = new List <SystemCard>();
foreach (SensorRecord record in records)
{
SystemCard holderCard = new SystemCard();
holderCard.PopulateSystemFromRecord(record);
cards.Add(holderCard);
}
ShuffleSystemCards(cards);
return(cards);
}
private void ShuffleSystemCards(List <SystemCard> list)
{
RNGCryptoServiceProvider provider = new RNGCryptoServiceProvider();
int n = list.Count;
while (n > 1)
{
byte[] box = new byte[1];
do
{
provider.GetBytes(box);
}while (!(box[0] < n * (Byte.MaxValue / n)));
int k = (box[0] % n);
n--;
SystemCard value = list[k];
list[k] = list[n];
list[n] = value;
}
}
// Given a sensor, give 1 right card and 2 random cards
public List <Card> DealCardsForSensor(SystemCard system)
{
List <Card> cards = ListAllCards();
// run them through matcher in random order until a match is found
CardMatcher matcher = new CardMatcher();
int necessaryCards = 3;
List <Card> dealtCards = new List <Card>();
foreach (Card card in cards)
{
if (matcher.CheckForMatch(card, system))
{
dealtCards.Add(card);
}
else if (necessaryCards > 1)
{
dealtCards.Add(card);
necessaryCards--;
}
}
return(dealtCards);
}
