/// <summary>
/// Gets the Students StudyGroups used for push notifications from the server.
/// </summary>
/// <returns></returns>
public async Task<List<StudyGroup>> GetStudentsStudyGroupFromServer()
{
DbStudent db = new DbStudent();
Student student = db.GetStudent();
if (student == null)
{
Authenticater.Authorized = false;
return null;
}
string encodedUsername = Hasher.Base64Encode(student.username);
Uri url = new Uri(Adress + "/" + encodedUsername);
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent uri: " + url.ToString());
string accessToken = db.GetStudentAccessToken();
if (accessToken == null)
{
Authenticater.Authorized = false;
return null;
}
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
string jsonString = null;
try
{
var response = await client.GetAsync(url).ConfigureAwait(false);
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent failed due to lack of Authorization");
Authenticater.Authorized = false;
return null;
}
System.Diagnostics.Debug.WriteLine("UpdateStudyGroupStudent response " + response.StatusCode.ToString());
jsonString = await response.Content.ReadAsStringAsync();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("StudentsController - UpdateStudyGroupStudent: End Of Stack Trace");
return null;
}
if (jsonString != null)
{
return ExtractStudyGroupsFromJson(jsonString);
//DeleteAllStudyGroupStudent();
//CreateStudyGroupStudents(student.username, studyGroupIds);
}
return null;
}
/// <summary>
/// Gets all StudyGroups from the servers REST Api.
/// </summary>
public async Task UpdateStudyGroupsFromServer()
{
DbStudyGroup db = new DbStudyGroup();
System.Diagnostics.Debug.WriteLine("StudyGroupsController - GetStudyGroupsFromServer: initiated");
DbStudent dbStudent = new DbStudent();
string accessToken = dbStudent.GetStudentAccessToken();
if (accessToken == null)
{
Authenticater.Authorized = false;
return;
}
Uri url = new Uri(Adress);
System.Diagnostics.Debug.WriteLine("StudyGroupsController - url " + url.ToString());
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
try
{
var response = await client.GetAsync(url);
if (response.StatusCode == HttpStatusCode.OK) {
System.Diagnostics.Debug.WriteLine("GetStudyGroupsFromServer response " + response.StatusCode.ToString());
var results = await response.Content.ReadAsAsync<IEnumerable<StudyGroup>>();
db.DeleteAllStudyGroups();
foreach (var studygroup in results)
{
// ugly gui filter hack
studygroup.filterChecked = false;
db.InsertStudyGroup(studygroup);
}
}
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
Authenticater.Authorized = false;
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("StudyGroupsController - GetStudyGroupsFromServer: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("StudyGroupsController - GetStudyGroupsFromServer: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("StudyGroupsController - GetStudyGroupsFromServer: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("StudyGroupsController - GetStudyGroupsFromServer: End Of Stack Trace");
}
}
public async Task CompareServerHash()
{
DbStudent dbStudent = new DbStudent();
string accessToken = dbStudent.GetStudentAccessToken();
if (accessToken == null)
{
Authenticater.Authorized = false;
return;
}
Uri url = new Uri(Adress + "/hash");
System.Diagnostics.Debug.WriteLine("CoursesController - url " + url.ToString());
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
try
{
var response = await client.GetAsync(url);
if (response.StatusCode == HttpStatusCode.OK)
{
System.Diagnostics.Debug.WriteLine("CompareServerHash response " + response.StatusCode.ToString());
string json = await response.Content.ReadAsStringAsync();
string hash = ExtractServersHash(json);
string localHash = CreateLocalHash();
if (hash != localHash)
{
await UpdateCoursesFromServer();
}
}
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
Authenticater.Authorized = false;
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("CoursesController - CompareServerHash: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("CoursesController - CompareServerHash: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("CoursesController - CompareServerHash: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("CoursesController - CompareServerHash: End Of Stack Trace");
}
}
/// <summary>
/// Gets all Courses from the servers REST Api.
/// </summary>
public async Task UpdateCoursesFromServer()
{
DbCourse db = new DbCourse();
System.Diagnostics.Debug.WriteLine("CoursesController - UpdateCoursesFromServer: initiated");
DbStudent dbStudent = new DbStudent();
string accessToken = dbStudent.GetStudentAccessToken();
if (accessToken == null)
{
Authenticater.Authorized = false;
return;
}
Uri url = new Uri(Adress);
System.Diagnostics.Debug.WriteLine("CoursesController - url " + url.ToString());
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
try
{
var response = await client.GetAsync(url);
if (response.StatusCode == HttpStatusCode.OK)
{
System.Diagnostics.Debug.WriteLine("UpdateCoursesFromServer response " + response.StatusCode.ToString());
var newCourses = await response.Content.ReadAsAsync<IEnumerable<Course>>();
db.DeleteAllCourses();
db.InsertCourses(newCourses);
}
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
Authenticater.Authorized = false;
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("CoursesController - UpdateCoursesFromServer: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("CoursesController - UpdateCoursesFromServer: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("CoursesController - UpdateCoursesFromServer: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("CoursesController - UpdateCoursesFromServer: End Of Stack Trace");
}
}
/// <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>
/// Updates the Project from the servers REST Api.
///
/// This implementation also get the minimum data from the related
/// Companies to build a proper notification list.
/// </summary>
/// <param name="uuid"></param>
public async Task UpdateProjectFromServer(string uuid)
{
System.Diagnostics.Debug.WriteLine("ProjectController - UpdateProjectFromServer(string uuid): initiated");
string adress = Adress + "/" + uuid;
System.Diagnostics.Debug.WriteLine("UpdateProjectFromServer: var url = " + adress);
DbStudent dbStudent = new DbStudent();
string accessToken = dbStudent.GetStudentAccessToken();
if (string.IsNullOrWhiteSpace(accessToken))
{
Authenticater.Authorized = false;
return;
}
Uri url = new Uri(adress);
var client = new HttpClient();
System.Diagnostics.Debug.WriteLine("ProjectController - UpdateProjectFromServer: HttpClient created");
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
string jsonString = null;
try
{
var response = await client.GetAsync(url);
System.Diagnostics.Debug.WriteLine("UpdateProjectFromServer response " + response.StatusCode.ToString());
//results = await response.Content.ReadAsAsync<IEnumerable<Project>>();
jsonString = await response.Content.ReadAsStringAsync();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("ProjectController - UpdateProjectFromServer: await client.GetAsync(\"url\") Failed");
System.Diagnostics.Debug.WriteLine("ProjectController - UpdateProjectFromServer: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("ProjectController - UpdateProjectFromServer: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("ProjectController - UpdateProjectFromServer: End Of Stack Trace");
return;
}
Deserialize(jsonString);
}
/// <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;
}
}
}
public async Task UpdateServersDb()
{
DbDevice db = new DbDevice();
DbStudent dbStudent = new DbStudent();
Student student = dbStudent.GetStudent();
Device device = db.GetDevice();
string accessToken = dbStudent.GetStudentAccessToken();
if (student == null || accessToken == null || device == null || student.username != device.username)
{
Authenticater.Authorized = false;
return;
}
if (device.tokenSent)
{
return;
}
System.Diagnostics.Debug.WriteLine("DevicesController - UpdateServersDb - bearer: " + accessToken);
string serializedJson = "{\"Device\":[{\"id\":\"" + device.id + "\"," + "\"token\":\"" + device.token + "\"," +
"\"deviceType\":\"" + device.deviceType + "\"}]}";
// {"Device":[{"id":"HT451WM08832","token":"longGCMToken","deviceType":"android"}]}
System.Diagnostics.Debug.WriteLine("DevicesController - UpdateServersDb serializedJson: " + serializedJson);
string encodedUsername = Hasher.Base64Encode(student.username);
//"api/v1/students/{id}"
string updateAdress = studentAdress + "/" + encodedUsername;
System.Diagnostics.Debug.WriteLine("DevicesController - UpdateServersDb - adress: " + updateAdress);
Uri url = new Uri(updateAdress);
System.Diagnostics.Debug.WriteLine("DevicesController - UpdateServersDb - url.ToString: " + url.ToString());
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
var content = new StringContent(serializedJson, Encoding.UTF8, "application/json");
try
{
var response = await client.PostAsync(url, content);
System.Diagnostics.Debug.WriteLine("UpdateServersDb response " + response.StatusCode.ToString());
if (response.StatusCode == HttpStatusCode.OK)
{
device.tokenSent = true;
db.UpdateDevice(device);
return;
}
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
System.Diagnostics.Debug.WriteLine("DevicesController - UpdateServersDb failed due to lack of Authorization");
Authenticater.Authorized = false;
}
// response.StatusCode is either unauthorized or another failed status.
return;
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: await client.PostAsJsonAsync(url, jsonString) Failed");
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: End Of Stack Trace");
return;
}
}
/// <summary>
/// Posts the Students StudyGroups used for push notifications to the server.
/// </summary>
/// <returns></returns>
public async Task<bool> PostStudentsStudyGroupToServer(List<string> studyGroups)
{
DbStudent db = new DbStudent();
Student student = db.GetStudent();
string accessToken = db.GetStudentAccessToken();
if (student == null || accessToken == null)
{
Authenticater.Authorized = false;
return false;
}
string jsonString = "";
if (studyGroups.Count == 0)
{
string id = Hasher.Base64Encode("none");
studyGroups.Add(id);
}
foreach (var studyGroup in studyGroups)
{
string id = Hasher.Base64Decode(studyGroup);
if (string.IsNullOrWhiteSpace(jsonString))
{
jsonString = "{\"StudyGroup\":[{\"id\":\"" + id + "\"}";
}
else
{
jsonString += ",{\"id\":\"" + id + "\"}";
}
}
jsonString += "]}";
// {"StudyGroup":[{"id":"idrettsfag"},{"id":"datateknologi"}]}
// {"studyGroups":[{"id":"helse"},{"id":"ingeniør"},{"id":"samfunnsfag"}]}
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer jsonString: " + jsonString);
string encodedUsername = Hasher.Base64Encode(student.username);
Uri url = new Uri(Adress + "/" + encodedUsername);
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer uri: " + url.ToString());
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
var content = new StringContent(jsonString, Encoding.UTF8, "application/json");
try
{
var response = await client.PostAsync(url, content);
System.Diagnostics.Debug.WriteLine("PostStudentsStudyGroupToServer response " + response.StatusCode.ToString());
if (response.StatusCode == HttpStatusCode.OK)
{
return true;
}
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer failed due to lack of Authorization");
Authenticater.Authorized = false;
}
// response.StatusCode is either unauthorized or another failed status.
return false;
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: await client.PostAsJsonAsync(url, jsonString) Failed");
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: Exception msg: " + e.Message);
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: Stack Trace: \n" + e.StackTrace);
System.Diagnostics.Debug.WriteLine("StudentsController - PostStudentsStudyGroupToServer: End Of Stack Trace");
return false;
}
}
