// Returns the difference between the existing total and the new total
// (which is the count of new cases). Sets the new total as the current
// total. This method needs to be called in date order or the new cases
// will not be counted correctly.
public Cases GetNewCases(string state, Cases newTotal)
{
state = state.ToLowerInvariant();
if (currentTotals.ContainsKey(state))
{
// If there are already some cases for this state, calculate
// the difference betwen the current total and this new total
// to get the count of new cases.
var current = currentTotals[state];
currentTotals[state] = newTotal;
return(current.Difference(newTotal));
}
else
{
// If there is no record for the current state, the number of
// new cases is going to be equal to the total (because this
// is the state's first time reporting).
currentTotals[state] = newTotal;
return(newTotal);
}
}
public DailyStateData(DateTimeOffset date, Cases totalCases, Cases newCases)
{
Date = date;
Total = totalCases;
New = newCases;
}
public Data FormatAndCalculateData(SortedList <DateTimeOffset, DailyReport> reports)
{
var runningTotals = new RunningTotals();
var stateSet = new HashSet <string>();
var data = new Data();
// Prepare the dataset and target container for processing.
//
// Reports don't have data for each state for each day (as some states only
// started reporting cases later in the outbreak). Need to do a first pass
// of the data to find all of the states available for Australia.
foreach (var day in reports)
{
// Keep a record of all of the dates, this will likely be the
// x-axis labels wherever it is graphed.
data.Dates.Add(day.Key);
foreach (var state in day.Value.Data)
{
var stateName = state.Key;
if (stateSet.Add(stateName))
{
// Add a new dataset container for this state, we'll add
// data to it in the next pass.
var newStateData = new StateData()
{
DisplayName = state.Value.FormattedStateName
};
data.States.Add(stateName, newStateData);
}
}
}
// There is a report every day, so we're just starting from the
// first day of data and working our way forward. These days need to
// be in order or the running totals will not work.
foreach (var reportDay in reports)
{
var reportDayDate = reportDay.Key;
var reportDayStates = reportDay.Value;
foreach (var stateName in stateSet)
{
var state = data.States[stateName];
// If there is no data for the state on this day, it will be
// recorded as all zeros. This will make sure we have a full
// set of data for all states for all days. If there is data
// for this day, we'll overwrite this value below.
var totalCasesForState = new Cases();
if (reportDayStates.Data.ContainsKey(stateName))
{
var reportDayStateData = reportDayStates.Data[stateName];
totalCasesForState = new Cases(
reportDayStateData.Confirmed,
reportDayStateData.Deaths,
reportDayStateData.Recovered
);
}
var newCasesForState = runningTotals.GetNewCases(stateName, totalCasesForState);
var dailyStateData = new DailyStateData(reportDayDate, totalCasesForState, newCasesForState);
state.Data.Add(dailyStateData);
}
}
return(data);
}
public DailyStateData(DateTimeOffset date)
{
Date = date;
Total = new Cases();
New = new Cases();
}