/// <summary>
/// Can return 3 different values:
/// 1. "exists": No new project on the server.
/// 2. "incorrectCache": If the cache indicates that local database got data that the server doesnt have.
/// 3. "newData": There are new projects available on the server.
/// 4. null: Check if Authenticater.Authorized has been set to false, if not the app could most likely not reach the server.
/// </summary>
/// <returns></returns>
private async Task <String> CheckServerForNewData(List <string> studyGroups = null, Dictionary <string, string> filter = null)
{
string queryParams = CreateQueryParams(studyGroups, null, filter);
//"api/v1/jobs/lastmodifed"
string adress = Adress + "/" + "lastmodified" + queryParams;
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData - adress: " + adress);
Uri url = new Uri(adress);
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData - url.ToString: " + url.ToString());
var client = new HttpClient();
DbStudent dbStudent = new DbStudent();
string accessToken = dbStudent.GetStudentAccessToken();
if (string.IsNullOrWhiteSpace(accessToken))
{
Authenticater.Authorized = false;
return(null);
}
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData - bearer: " + accessToken);
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
string jsonString = null;
try
{
var response = await client.GetAsync(url);
System.Diagnostics.Debug.WriteLine("CheckServerForNewData response " + response.StatusCode.ToString());
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData failed due to lack of Authorization");
Authenticater.Authorized = false;
}
else if (response.StatusCode == HttpStatusCode.OK)
{
//results = await response.Content.ReadAsAsync<IEnumerable<Job>>();
jsonString = await response.Content.ReadAsStringAsync();
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: End Of Stack Trace");
return(null);
}
if (jsonString != null)
{
// using <string, object> instead of <string, string> makes the date be stored in the right format when using .ToString()
Dictionary <string, object> dict = JsonConvert.DeserializeObject <Dictionary <string, object> >(jsonString);
if (dict.ContainsKey("uuid") && dict.ContainsKey("modified") && dict.ContainsKey("hash") && dict.ContainsKey("amountOfProjects"))
{
string uuid = dict["uuid"].ToString();
DateTime dateTime = (DateTime)dict["modified"];
long modified = long.Parse(dateTime.ToString("yyyyMMddHHmmss"));
string uuids = dict["hash"].ToString();
int amountOfProjects = 0;
try
{
amountOfProjects = Int32.Parse(dict["amountOfProjects"].ToString());
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: Exception msg: " + ex.Message);
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: Stack Trace: \n" + ex.StackTrace);
System.Diagnostics.Debug.WriteLine("ProjectController - CheckServerForNewData: End Of Stack Trace");
return(null);
}
DbProject dbProject = new DbProject();
bool existInDb = dbProject.ExistsInDb(uuid, modified);
if (!existInDb)
{
return("newData");
//return existInDb;
}
var localProjects = dbProject.GetProjectsFromDbBasedOnFilter(studyGroups, filter, true);
int localDbCount = localProjects.Count();
StringBuilder sb = new StringBuilder();
foreach (var project in localProjects)
{
sb.Append(project.uuid);
}
string localUuids = Hasher.CalculateMd5Hash(sb.ToString());
// if there is a greater amount of jobs on that search filter then the job that exist
// in the database has been inserted throught another search filter
if (uuids != localUuids)
{
if (amountOfProjects > localDbCount)
{
return("newData");
//return !existInDb;
}
return("incorrectCache");
}
return("exists");
//return existInDb;
}
}
return(null);
}
/// <summary>
/// Peter ikke se på denne metoden, den er kun for å teste databasen :D
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void TestProjectsFilterDb_OnClicked(object sender, EventArgs e)
{
List <string> studyGroups = new List <string>();
string helse = Hasher.Base64Encode("helse");
string datateknologi = Hasher.Base64Encode("datateknologi");
studyGroups.Add(helse);
studyGroups.Add(datateknologi);
//LEGG FAGOMRÅDER TIL AKTIVT FILTER HER MED EN SWITCH ELLER LIGNENDE
Dictionary <string, string> filter = new Dictionary <string, string>();
string DAT304 = Hasher.Base64Encode("DAT-304");
string virksomhet = Hasher.Base64Encode("virksomhet");
filter.Add("courses", DAT304);
filter.Add("types", virksomhet);
DbProject pc = new DbProject();
var projects = pc.GetProjectsFromDbBasedOnFilter(null, filter);
if (projects == null)
{
System.Diagnostics.Debug.WriteLine("TestProjectsFilterDb: was null aka failed!");
}
else
{
System.Diagnostics.Debug.WriteLine("TestProjectsFilterDb: projects.Count(): " +
projects.Count());
foreach (var project in projects)
{
System.Diagnostics.Debug.WriteLine("projects title: " + project.title);
if (project.companies != null)
{
System.Diagnostics.Debug.WriteLine("Companies is not null: " + project.companies[0].id);
}
}
}
var projects2 = pc.GetProjectsFromDbBasedOnFilter(studyGroups);
if (projects2 == null)
{
System.Diagnostics.Debug.WriteLine("TestProjectsFilterDb: was null aka failed!");
}
else
{
System.Diagnostics.Debug.WriteLine("GetProjectsFromDbBasedOnFilter: projects2.Count(): " +
projects2.Count());
foreach (var project in projects2)
{
System.Diagnostics.Debug.WriteLine("project2 title: " + project.title);
if (project.companies != null)
{
System.Diagnostics.Debug.WriteLine("Companies is not null: " + project.companies[0].id);
System.Diagnostics.Debug.WriteLine("Companies is not null: " + project.companies[0].name);
System.Diagnostics.Debug.WriteLine("Companies is not null: " + project.companies[0].logo);
}
}
}
var projects3 = pc.GetProjectsFromDbBasedOnFilter(studyGroups, filter);
if (projects3 == null)
{
System.Diagnostics.Debug.WriteLine("TestProjectsFilterDb: was null aka failed!");
}
else
{
System.Diagnostics.Debug.WriteLine("GetProjectsFromDbBasedOnFilter: projects3.Count(): " +
projects3.Count());
foreach (var project in projects3)
{
System.Diagnostics.Debug.WriteLine("projects3 title: " + project.title);
if (project.companies != null)
{
System.Diagnostics.Debug.WriteLine("Companies is not null: " + project.companies[0].id);
}
}
}
Dictionary <string, string> filter2 = new Dictionary <string, string>();
//string titles = Hasher.Base64Encode("Strømavleser vha gammel mobil");
filter2.Add("titles", "Strømavleser vha gammel mobil");
Dictionary <string, string> filter3 = new Dictionary <string, string>();
filter3.Add("titles", "vha");
var projects4 = pc.GetProjectsFromDbBasedOnFilter(studyGroups, filter2);
var projects5 = pc.GetProjectsFromDbBasedOnFilter(null, filter3);
if (projects4 == null || projects5 == null)
{
System.Diagnostics.Debug.WriteLine("TestProjectsFilterDb: was null aka failed!");
}
else
{
System.Diagnostics.Debug.WriteLine("GetProjectsFromDbBasedOnFilter: projects4.Count(): " +
projects4.Count());
System.Diagnostics.Debug.WriteLine("GetProjectsFromDbBasedOnFilter: projects5.Count(): " +
projects5.Count());
foreach (var project in projects4)
{
System.Diagnostics.Debug.WriteLine("projects4 title: " + project.title);
if (project.companies != null)
{
System.Diagnostics.Debug.WriteLine("Companies is not null: " + project.companies[0].id);
}
}
}
}
/// <summary>
/// Gets a project based on optional filters.
/// </summary>
/// <param name="studyGroups">studyGroups can be a list of numerous studygroups ex: helse, idrettsfag, datateknologi </param>>
/// <param name="filter">A dictionary where key can be: titles (values:title of the project), types (values: virksomhet, faglærer, etc...),
/// courses (values: "IS-304" "DAT-304" osv).
/// Supports only 1 key at this current implementation!</param>
/// <returns></returns>
public async Task <IEnumerable <Project> > GetProjectsBasedOnFilter(List <string> studyGroups = null,
Dictionary <string, string> filter = null)
{
DbProject db = new DbProject();
//string adress = "http://kompetansetorgetserver1.azurewebsites.net/api/v1/projects";
string instructions = await CheckServerForNewData(studyGroups, filter);
if (!Authenticater.Authorized)
{
return(null);
}
if (instructions != null)
{
System.Diagnostics.Debug.WriteLine("GetJobsBasedOnFilter - instructions" + instructions);
if (instructions == "exists")
{
IEnumerable <Project> filteredProjects = db.GetProjectsFromDbBasedOnFilter(studyGroups, filter);
filteredProjects = db.GetAllCompaniesRelatedToProjects(filteredProjects.ToList());
return(filteredProjects);
}
}
DbStudent dbStudent = new DbStudent();
string accessToken = dbStudent.GetStudentAccessToken();
if (string.IsNullOrWhiteSpace(accessToken))
{
Authenticater.Authorized = false;
return(null);
}
string sortBy = "publish";
string queryParams = CreateQueryParams(studyGroups, sortBy, filter);
Uri url = new Uri(Adress + queryParams);
System.Diagnostics.Debug.WriteLine("GetProjectsBasedOnFilter - url: " + url.ToString());
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
string jsonString = null;
IEnumerable <Project> projects = null;
try
{
var response = await client.GetAsync(url).ConfigureAwait(false);
System.Diagnostics.Debug.WriteLine("GetProjectsBasedOnFilter response " + response.StatusCode.ToString());
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent failed due to lack of Authorization");
Authenticater.Authorized = false;
}
else if (response.StatusCode == HttpStatusCode.OK)
{
jsonString = await response.Content.ReadAsStringAsync();
if (instructions != null && instructions == "incorrectCache")
{
var cachedProjects = db.GetProjectsFromDbBasedOnFilter(studyGroups, filter);
projects = DeserializeMany(jsonString);
// Get all jobs from that local dataset that was not in the dataset provided by the server
// These are manually deleted projects and have to be cleared from cache.
// linear search is ok because of small data set
var manuallyDeletedProjects = cachedProjects.Where(p => !projects.Any(cp2 => cp2.uuid == p.uuid));
db.DeleteObsoleteProjects(manuallyDeletedProjects.ToList());
}
else
{
projects = DeserializeMany(jsonString);
}
}
else
{
System.Diagnostics.Debug.WriteLine("GetProjectsBasedOnFilter - Using the local database");
projects = db.GetProjectsFromDbBasedOnFilter(studyGroups, filter);
projects = db.GetAllCompaniesRelatedToProjects(projects.ToList());
}
return(projects);
}
catch (Exception e)
{
// Hack workaround if mobil data and wifi is turned off
try
{
System.Diagnostics.Debug.WriteLine("GetProjectsBasedOnFilter - Using the local database");
projects = db.GetProjectsFromDbBasedOnFilter(studyGroups, filter);
projects = db.GetAllCompaniesRelatedToProjects(projects.ToList());
return(projects);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("ProjectsController - GetProjectsBasedOnFilter: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("ProjectsController - GetProjectsBasedOnFilter: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("ProjectsController - GetProjectsBasedOnFilter: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("ProjectsController - GetProjectsBasedOnFilter: End Of Stack Trace");
return(null);
}
}
}