private static async Task <SectionValues> GetV3SectionValuesAsync(
IUpstreamEdFiApiInvoker invoker,
HttpRequestHeaders headers,
SectionLookupKey lookupKey,
short schoolYearFromRoute)
{
// Get the referenced section by natural key
var response = await invoker.Get(
typeof(V3Section),
headers,
new[]
{
new KeyValuePair <string, string>("localCourseCode", lookupKey.LocalCourseCode),
new KeyValuePair <string, string>("schoolId", lookupKey.SchoolId.ToString()),
new KeyValuePair <string, string>("schoolYear", lookupKey.SchoolYear.ToString()),
new KeyValuePair <string, string>("sectionIdentifier", lookupKey.SectionIdentifier),
new KeyValuePair <string, string>("sessionName", lookupKey.SessionName),
},
schoolYearFromRoute)
.ConfigureAwait(false);
StreamReader sr = new StreamReader(response.ResponseStream);
string responseContent = await sr.ReadToEndAsync().ConfigureAwait(false);
if (response.Status == HttpStatusCode.OK)
{
// Get the Section-derived members
var v3Section = JsonConvert.DeserializeObject <V3Section[]>(responseContent, _serializerSettings).SingleOrDefault();
if (v3Section == null)
{
throw new Exception($"Unable to find referenced Section using the following values: {JsonConvert.SerializeObject(lookupKey, Formatting.Indented)}");
}
// Invasive defensive validation against "invalid" data for V2
if (lookupKey.SchoolId != v3Section.LocationReference.SchoolId)
{
throw new Exception($"Unable to convert the SectionReference from host (v3.1) to client (v2.5) because the LocationReference contains a School that differs from the containing Section, which is not supported under v2.5.");
}
// TODO: Validate presence of V2 required values, or ensure that V3 requires them (i.e. via required collections)
var sectionValues = new SectionValues(
classPeriodName: v3Section.SectionClassPeriods.FirstOrDefault()?.ClassPeriodReference.ClassPeriodName ?? "Undefined",
classroomIdentificationCode: v3Section.LocationReference.ClassroomIdentificationCode ?? "Undefined",
sectionIdentifier: v3Section.SectionIdentifier,
sequenceOfCourse: v3Section.SequenceOfCourse ?? -1,
retrievedDateTime: DateTime.Now);
return(sectionValues);
}
throw new Exception($"Error obtaining V3 Section resource during mapping of V2 SectionReference: {response.Status} - {responseContent}");
}
private static async Task ApplyPropertiesFromV3SectionAsync(
IUpstreamEdFiApiInvoker invoker,
HttpRequestHeaders headers,
V3SectionReference source,
V2SectionReference destination,
short schoolYearFromRoute)
{
var sectionLookupKey = new SectionLookupKey(source.LocalCourseCode, source.SchoolId, source.SchoolYear, source.SectionIdentifier, source.SessionName);
await Task.Run(() =>
{
var values = _sectionValuesByNaturalKey.GetOrAdd(sectionLookupKey, k =>
GetV3SectionValuesAsync(invoker, headers, k, schoolYearFromRoute)
.ConfigureAwait(false)
.GetAwaiter()
.GetResult());
// Are the retrieved values stale?
if ((DateTime.Now - values.RetrievedDateTime).TotalSeconds > _cacheDurationSeconds.Value)
{
// Refresh the values
SectionValues ignored;
_sectionValuesByNaturalKey.TryRemove(sectionLookupKey, out ignored);
values = _sectionValuesByNaturalKey.GetOrAdd(sectionLookupKey, k =>
GetV3SectionValuesAsync(invoker, headers, k, schoolYearFromRoute)
.ConfigureAwait(false)
.GetAwaiter()
.GetResult());
}
// Straight mappings from source
destination.LocalCourseCode = source.LocalCourseCode;
destination.SchoolId = source.SchoolId;
destination.SchoolYear = source.SchoolYear;
// Mappings from upstream host's Section
destination.ClassPeriodName = values.ClassPeriodName;
destination.ClassroomIdentificationCode = values.ClassroomIdentificationCode;
destination.SequenceOfCourse = values.SequenceOfCourse;
// NOTE: Assumes UniqueSectionCode is unique enough to use as the SectionIdentifier.
destination.UniqueSectionCode = values.SectionIdentifier;
})
.ConfigureAwait(false);
}
