Define routing interfaces for company flow, setup navigation through …

…interfaces between main module and company flow
Android-Academy-Global · Aug 16, 2020 · 1fcecd0 · 1fcecd0
1 parent 2c9db88
commit 1fcecd0
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Showing 6 changed files with 68 additions and 16 deletions.
diff --git a/app/src/main/java/com/aaglobal/jnc_playground/ui/tabs/search/SearchContainerFragment.kt b/app/src/main/java/com/aaglobal/jnc_playground/ui/tabs/search/SearchContainerFragment.kt
@@ -5,8 +5,11 @@ import android.view.View
 import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
 import com.aaglobal.jnc_playground.R
+import com.aaglobal.jnc_playground.company.CompanyDetailsFragment.Companion.COMPANY_FLOW_RESULT_FLAG
+import com.aaglobal.jnc_playground.company.di.CompanyDI
+import com.aaglobal.jnc_playground.company.routing.CompanyFragmentDetailsRouterSource
+import com.aaglobal.jnc_playground.company.routing.CompanyFragmentRouterSource
 import com.aaglobal.jnc_playground.core.utils.addFragmentLossIfNotExist
-import com.aaglobal.jnc_playground.company.CompanyDetailsFragment
 import com.aaglobal.jnc_playground.ui.vacancy.VacancyFragmentArgs
 import com.aaglobal.jnc_playground.ui.vacancy_list.VacancyListFragment
 import com.aaglobal.jnc_playground.ui.vacancy_list.VacancyListRouterSource
@@ -22,12 +25,15 @@ class SearchContainerFragment : Fragment(R.layout.fragment_search_container) {
         // Read result from nested navigation flow
         val companyFlowResult = findNavController().currentBackStackEntry
             ?.savedStateHandle
-            ?.remove<Boolean>(CompanyDetailsFragment.COMPANY_FLOW_RESULT_FLAG)
+            ?.remove<Boolean>(COMPANY_FLOW_RESULT_FLAG)
         fragment_search_container__text__company_flow_result.text = getString(
             R.string.fragment_search_container__company_flow_result, companyFlowResult?.toString()
         )
 
         fragment_search_container__button__open_company_flow.setOnClickListener {
+            // We need to init interfaces for routing
+            initCompanyDI()
+            // And only after that we can go into module navigation
             findNavController().navigate(R.id.action__SearchContainerFragment__to__CompanyFlow)
         }
 
@@ -53,4 +59,23 @@ class SearchContainerFragment : Fragment(R.layout.fragment_search_container) {
         )
     }
 
+
+    private fun initCompanyDI() {
+        CompanyDI.companyFragmentRouterSource = object : CompanyFragmentRouterSource {
+            override fun moveToCompanyDetails() {
+                findNavController().navigate(R.id.action__CompanyFragment__to__CompanyDetailsFragment)
+            }
+        }
+        CompanyDI.companyFragmentDetailsRouterSource = object : CompanyFragmentDetailsRouterSource {
+            override fun finishCompanyFlow(flowResult: Boolean) {
+                // Here we are inside nested navigation flow
+                findNavController().popBackStack(R.id.company_flow__nav_graph, true)
+
+                // At this line, "findNavController().currentBackStackEntry" means screen that STARTED current nested flow.
+                // So we can send result!
+                findNavController().currentBackStackEntry?.savedStateHandle?.set(COMPANY_FLOW_RESULT_FLAG, true)
+            }
+        }
+    }
+
 }
diff --git a/features/company/src/main/java/com/aaglobal/jnc_playground/company/CompanyDetailsFragment.kt b/features/company/src/main/java/com/aaglobal/jnc_playground/company/CompanyDetailsFragment.kt
@@ -3,8 +3,7 @@ package com.aaglobal.jnc_playground.company
 import android.os.Bundle
 import android.view.View
 import androidx.fragment.app.Fragment
-import androidx.navigation.fragment.findNavController
-import com.aaglobal.jnc_playground.R
+import com.aaglobal.jnc_playground.company.di.CompanyDI
 import kotlinx.android.synthetic.main.fragment_company_details.*
 
 
@@ -18,18 +17,11 @@ class CompanyDetailsFragment : Fragment(R.layout.fragment_company_details) {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        /**
-         * To return on screen that started this flow, we use `popBackStack` function.
-         *
-         * Such method allows us don't think about propagating "start" screen @id
-         */
+
+        // We use special interface for navigating from this module
         fragment_company_details__button.setOnClickListener {
-            // Here we are inside nested navigation flow
-            findNavController().popBackStack(R.id.company_flow__nav_graph, true)
+            CompanyDI.companyFragmentDetailsRouterSource?.finishCompanyFlow(flowResult = true)
 
-            // At this line, "findNavController().currentBackStackEntry" means screen that STARTED current nested flow.
-            // So we can send result!
-            findNavController().currentBackStackEntry?.savedStateHandle?.set(COMPANY_FLOW_RESULT_FLAG, true)
         }
     }
 

diff --git a/features/company/src/main/java/com/aaglobal/jnc_playground/company/CompanyFragment.kt b/features/company/src/main/java/com/aaglobal/jnc_playground/company/CompanyFragment.kt
@@ -3,7 +3,7 @@ package com.aaglobal.jnc_playground.company
 import android.os.Bundle
 import android.view.View
 import androidx.fragment.app.Fragment
-import androidx.navigation.fragment.findNavController
+import com.aaglobal.jnc_playground.company.di.CompanyDI
 import kotlinx.android.synthetic.main.fragment_company.*
 
 
@@ -12,8 +12,9 @@ class CompanyFragment : Fragment(R.layout.fragment_company) {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
+        // We use special interface for navigating from this module
         fragment_company__button.setOnClickListener {
-            findNavController().navigate(R.id.action__CompanyFragment__to__CompanyDetailsFragment)
+            CompanyDI.companyFragmentRouterSource?.moveToCompanyDetails()
         }
     }
 

diff --git a/features/company/src/main/java/com/aaglobal/jnc_playground/company/di/CompanyDI.kt b/features/company/src/main/java/com/aaglobal/jnc_playground/company/di/CompanyDI.kt
@@ -0,0 +1,18 @@
+package com.aaglobal.jnc_playground.company.di
+
+import com.aaglobal.jnc_playground.company.routing.CompanyFragmentDetailsRouterSource
+import com.aaglobal.jnc_playground.company.routing.CompanyFragmentRouterSource
+
+
+/**
+ * I need to init this object before I start navigating into Companies flow.
+ *
+ * In real app you may be use some DI-framework (e.g. Toothpick) and bind implementations of this interfaces to
+ * appropriate structures of this DI-framework.
+ */
+object CompanyDI {
+
+    var companyFragmentRouterSource: CompanyFragmentRouterSource? = null
+    var companyFragmentDetailsRouterSource: CompanyFragmentDetailsRouterSource? = null
+
+}
diff --git a/...in/java/com/aaglobal/jnc_playground/company/routing/CompanyFragmentDetailsRouterSource.kt b/...in/java/com/aaglobal/jnc_playground/company/routing/CompanyFragmentDetailsRouterSource.kt
@@ -0,0 +1,8 @@
+package com.aaglobal.jnc_playground.company.routing
+
+
+interface CompanyFragmentDetailsRouterSource {
+
+    fun finishCompanyFlow(flowResult: Boolean)
+
+}
diff --git a/.../src/main/java/com/aaglobal/jnc_playground/company/routing/CompanyFragmentRouterSource.kt b/.../src/main/java/com/aaglobal/jnc_playground/company/routing/CompanyFragmentRouterSource.kt
@@ -0,0 +1,8 @@
+package com.aaglobal.jnc_playground.company.routing
+
+
+interface CompanyFragmentRouterSource {
+
+    fun moveToCompanyDetails()
+
+}