Implement initial authentication flow

app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationFragment.kt

@@ -1,18 +1,32 @@
 package gq.kirmanak.mealie.ui.auth
 
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.EditText
+import android.widget.Toast
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.viewModels
+import androidx.lifecycle.lifecycleScope
+import com.google.android.material.textfield.TextInputLayout
 import dagger.hilt.android.AndroidEntryPoint
 import gq.kirmanak.mealie.databinding.FragmentAuthenticationBinding
 
+private const val TAG = "AuthenticationFragment"
+
 @AndroidEntryPoint
 class AuthenticationFragment : Fragment() {
     private var _binding: FragmentAuthenticationBinding? = null
     private val binding: FragmentAuthenticationBinding
         get() = checkNotNull(_binding) { "Binding requested when fragment is off screen" }
+    private val viewModel by viewModels<AuthenticationViewModel>()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        checkIfAuthenticatedAlready()
+    }
 
     override fun onCreateView(
         inflater: LayoutInflater,
@@ -23,6 +37,63 @@ class AuthenticationFragment : Fragment() {
         return binding.root
     }
 
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.button.setOnClickListener {
+            onLoginClicked()
+        }
+    }
+
+    private fun checkIfAuthenticatedAlready() {
+        lifecycleScope.launchWhenCreated {
+            Toast.makeText(
+                requireContext(),
+                if (viewModel.isAuthenticated()) "User is authenticated"
+                else "User isn't authenticated",
+                Toast.LENGTH_SHORT
+            ).show()
+        }
+    }
+
+    private fun onLoginClicked() {
+        val email: String
+        val pass: String
+        val url: String
+        with(binding) {
+            email = checkIfInputIsEmpty(emailInput, emailInputLayout) {
+                "Email is empty"
+            } ?: return
+            pass = checkIfInputIsEmpty(passwordInput, passwordInputLayout) {
+                "Pass is empty"
+            } ?: return
+            url = checkIfInputIsEmpty(urlInput, urlInputLayout) {
+                "URL is empty"
+            } ?: return
+        }
+        lifecycleScope.launchWhenResumed {
+            val exception = viewModel.authenticate(email, pass, url)
+            Log.e(TAG, "onLoginClicked: ", exception)
+            Toast.makeText(
+                requireContext(),
+                "Exception is ${exception?.message ?: "null"}",
+                Toast.LENGTH_SHORT
+            ).show()
+        }
+    }
+
+    private fun checkIfInputIsEmpty(
+        input: EditText,
+        inputLayout: TextInputLayout,
+        errorText: () -> String
+    ): String? {
+        val text = input.text?.toString()
+        if (text.isNullOrBlank()) {
+            inputLayout.error = errorText()
+            return null
+        }
+        return text
+    }
+
     override fun onDestroyView() {
         super.onDestroyView()
         _binding = null

app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationViewModel.kt

@@ -0,0 +1,17 @@
+package gq.kirmanak.mealie.ui.auth
+
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import gq.kirmanak.mealie.data.auth.AuthRepo
+import javax.inject.Inject
+
+@HiltViewModel
+class AuthenticationViewModel @Inject constructor(
+    private val authRepo: AuthRepo
+) : ViewModel() {
+    suspend fun isAuthenticated(): Boolean = authRepo.isAuthenticated()
+
+    suspend fun authenticate(username: String, password: String, baseUrl: String): Throwable? {
+        return authRepo.authenticate(username, password, baseUrl)
+    }
+}