Make getFormulaFragmentId() a public function. (#400)

Author: Laimiux

formula-android/src/main/java/com/instacart/formula/android/FormulaFragment.kt

@@ -7,7 +7,6 @@ import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import com.instacart.formula.FormulaAndroid
 import com.instacart.formula.android.internal.FormulaFragmentDelegate
-import com.instacart.formula.android.internal.getFormulaFragmentId
 import com.instacart.formula.android.internal.getOrSetArguments
 import java.lang.Exception
 

formula-android/src/main/java/com/instacart/formula/android/FragmentId.kt

@@ -1,5 +1,9 @@
 package com.instacart.formula.android
 
+import androidx.fragment.app.Fragment
+import com.instacart.formula.android.internal.getFragmentInstanceId
+import com.instacart.formula.android.internal.getFragmentKey
+
 /**
  * An object used to identify a fragment. It combines both a user generated [key] and
  * a generated [String] id.
@@ -12,4 +16,14 @@ package com.instacart.formula.android
 data class FragmentId(
     val instanceId: String,
     val key: FragmentKey
-)
+)
+
+/**
+ * Gets a [FragmentId] for a given [Fragment].
+ */
+fun Fragment.getFormulaFragmentId(): FragmentId {
+    return FragmentId(
+        instanceId = getFragmentInstanceId(),
+        key = getFragmentKey()
+    )
+}

formula-android/src/main/java/com/instacart/formula/android/internal/FragmentFlowRenderView.kt

@@ -16,6 +16,7 @@ import com.instacart.formula.android.BackCallback
 import com.instacart.formula.android.FeatureEvent
 import com.instacart.formula.android.FragmentId
 import com.instacart.formula.android.ViewFactory
+import com.instacart.formula.android.getFormulaFragmentId
 import java.util.LinkedList
 
 /**

formula-android/src/main/java/com/instacart/formula/android/internal/FragmentLifecycle.kt

@@ -19,7 +19,7 @@ internal object FragmentLifecycle {
     }
 }
 
-private fun Fragment.getFragmentKey(): FragmentKey {
+internal fun Fragment.getFragmentKey(): FragmentKey {
     val fragment = this as? BaseFormulaFragment<*>
     return fragment?.getFragmentKey() ?: EmptyFragmentKey(tag.orEmpty())
 }
@@ -28,7 +28,7 @@ private fun Fragment.getFragmentKey(): FragmentKey {
  * Gets a persisted across configuration changes fragment identifier or initializes
  * one if it doesn't exist.
  */
-private fun Fragment.getFragmentInstanceId(): String {
+internal fun Fragment.getFragmentInstanceId(): String {
     return if (this is BaseFormulaFragment<*>) {
         val arguments = getOrSetArguments()
         val id = arguments.getString(FormulaFragment.ARG_FORMULA_ID, "")
@@ -42,13 +42,6 @@ private fun Fragment.getFragmentInstanceId(): String {
     }
 }
 
-internal fun Fragment.getFormulaFragmentId(): FragmentId {
-    return FragmentId(
-        instanceId = getFragmentInstanceId(),
-        key = getFragmentKey()
-    )
-}
-
 internal fun Fragment.getOrSetArguments(): Bundle {
     return arguments ?: run {
         Bundle().apply {