WIP: Implements the Login functionality

- Adds multiple android dependencies, for DI and some utilities
- Updates colors and styles
- Adds an Application
- Adds the Login Fragment and ViewModel

3 files changed, 147 insertions, 0 deletions

diff --git a/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginActivity.kt b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginActivity.kt
new file mode 100644
index 0000000..3aec7b8
--- /dev/null
+++ b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginActivity.kt
@@ -0,0 +1,14 @@
+package mx.trackermap.TrackerMap.android.session
+
+import android.os.Bundle
+import android.os.PersistableBundle
+import android.util.Log
+import androidx.appcompat.app.AppCompatActivity
+import mx.trackermap.TrackerMap.android.R
+
+class LoginActivity: AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.login_activity)
+    }
+}
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diff --git a/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginFragment.kt b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginFragment.kt
new file mode 100644
index 0000000..5039a7c
--- /dev/null
+++ b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginFragment.kt
@@ -0,0 +1,76 @@
+package mx.trackermap.TrackerMap.android.session
+
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.core.widget.doAfterTextChanged
+import androidx.fragment.app.Fragment
+import com.zhuinden.liveevent.observe
+import mx.trackermap.TrackerMap.android.databinding.LoginBinding
+import org.koin.androidx.viewmodel.ext.android.viewModel
+
+class LoginFragment : Fragment() {
+
+    private var _binding: LoginBinding? = null
+    private val binding get() = _binding!!
+    private val loginViewModel: LoginViewModel by viewModel()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = LoginBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        setupEvents()
+        setupObservers()
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+
+    private fun setupEvents() {
+        binding.usernameEditText.doAfterTextChanged {
+            loginViewModel.email.value = it.toString()
+        }
+        binding.passwordEditText.doAfterTextChanged {
+            loginViewModel.password.value = it.toString()
+        }
+        binding.signinButton.setOnClickListener {
+            loginViewModel.login()
+        }
+    }
+
+    private fun setupObservers() {
+        loginViewModel.loginResult.observe(this) { result ->
+            Log.d("LoginFragment", result.toString())
+            when (result) {
+                LoginViewModel.LoginResult.Loading -> {
+                    Toast.makeText(context, "Loading...", Toast.LENGTH_SHORT).show()
+                }
+                LoginViewModel.LoginResult.EmailMissing -> {
+                    Toast.makeText(context, "Email is missing", Toast.LENGTH_SHORT).show()
+                }
+                LoginViewModel.LoginResult.PasswordMissing -> {
+                    Toast.makeText(context, "Password is missing", Toast.LENGTH_SHORT).show()
+                }
+                LoginViewModel.LoginResult.Failure -> {
+                    Toast.makeText(context, "Failed login", Toast.LENGTH_SHORT).show()
+                }
+                LoginViewModel.LoginResult.Success -> {
+                    Toast.makeText(context, "Success", Toast.LENGTH_SHORT).show()
+                }
+            }
+        }
+    }
+}
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diff --git a/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginViewModel.kt b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginViewModel.kt
new file mode 100644
index 0000000..9df78aa
--- /dev/null
+++ b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/session/LoginViewModel.kt
@@ -0,0 +1,57 @@
+package mx.trackermap.TrackerMap.android.session
+
+import android.util.Log
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.SavedStateHandle
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.zhuinden.eventemitter.EventEmitter
+import com.zhuinden.eventemitter.EventSource
+import kotlinx.coroutines.launch
+import mx.trackermap.TrackerMap.client.apis.SessionApi
+
+class LoginViewModel(
+    private val sessionApi: SessionApi,
+    savedStateHandle: SavedStateHandle
+) : ViewModel() {
+
+    sealed class LoginResult {
+        object Loading: LoginResult()
+        object EmailMissing : LoginResult()
+        object PasswordMissing : LoginResult()
+        object Failure : LoginResult()
+        object Success : LoginResult()
+    }
+
+    val email: MutableLiveData<String> = savedStateHandle.getLiveData("user", "")
+    val password: MutableLiveData<String> = savedStateHandle.getLiveData("password", "")
+
+    private val loginResultEmitter = EventEmitter<LoginResult>()
+    val loginResult: EventSource<LoginResult> = loginResultEmitter
+
+    fun login() {
+        val email = email.value!!.toString().trim()
+        val password = password.value!!.toString().trim()
+
+        if (email.isEmpty()) {
+            loginResultEmitter.emit(LoginResult.EmailMissing)
+            return
+        }
+
+        if (password.isEmpty()) {
+            loginResultEmitter.emit(LoginResult.PasswordMissing)
+            return
+        }
+
+        loginResultEmitter.emit(LoginResult.Loading)
+        viewModelScope.launch {
+            try {
+                val user = sessionApi.sessionPost(email, password)
+                Log.d("LoginViewModel", user.toString())
+                loginResultEmitter.emit(LoginResult.Success)
+            } catch (e: Exception) {
+                loginResultEmitter.emit(LoginResult.Failure)
+            }
+        }
+    }
+}
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