Replace with safe call works now on UNSAFE_IMPLICIT_INVOKE #KT-12628 Fixed

(cherry picked from commit 208798d)

idea/src/org/jetbrains/kotlin/idea/quickfix/QuickFixRegistrar.kt

@@ -205,6 +205,7 @@ class QuickFixRegistrar : QuickFixContributor {
         UNNECESSARY_NOT_NULL_ASSERTION.registerFactory(RemoveExclExclCallFix)
         UNSAFE_INFIX_CALL.registerFactory(ReplaceInfixCallFix)
         UNSAFE_CALL.registerFactory(ReplaceInfixCallFix) // [] only
+        UNSAFE_IMPLICIT_INVOKE_CALL.registerFactory(ReplaceInfixCallFix)
 
         AMBIGUOUS_ANONYMOUS_TYPE_INFERRED.registerActions(SpecifyTypeExplicitlyFix())
         PROPERTY_WITH_NO_TYPE_NO_INITIALIZER.registerActions(SpecifyTypeExplicitlyFix())

idea/src/org/jetbrains/kotlin/idea/quickfix/ReplaceInfixCallFix.kt

@@ -51,6 +51,11 @@ class ReplaceInfixCallFix(element: KtExpression) : KotlinQuickFixAction<KtExpres
                     element.replace(newExpression)
                 }
             }
+            is KtCallExpression -> {
+                val newExpression = psiFactory.createExpressionByPattern(
+                        "$0?.invoke($1)", element.calleeExpression ?: return, element.valueArguments.joinToString(", ") { it.text })
+                element.replace(newExpression)
+            }
             is KtBinaryExpression -> {
                 if (element.operationToken == KtTokens.IDENTIFIER) {
                     val newExpression = psiFactory.createExpressionByPattern(
@@ -78,9 +83,19 @@ class ReplaceInfixCallFix(element: KtExpression) : KotlinQuickFixAction<KtExpres
                 if (expression.arrayExpression == null) return null
                 return ReplaceInfixCallFix(expression)
             }
-            val binaryExpression = expression.parent as? KtBinaryExpression ?: return null
-            if (binaryExpression.left == null || binaryExpression.right == null) return null
-            return ReplaceInfixCallFix(binaryExpression)
+            val parent = expression.parent
+            return when (parent) {
+                is KtBinaryExpression -> {
+                    if (parent.left == null || parent.right == null) null
+                    else ReplaceInfixCallFix(parent)
+                }
+                is KtCallExpression -> {
+                    if (parent.calleeExpression == null) null
+                    else if (parent.parent is KtQualifiedExpression) null
+                    else ReplaceInfixCallFix(parent)
+                }
+                else -> null
+            }
         }
     }
 }

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvoke.kt

@@ -0,0 +1,3 @@
+// "Replace with safe (?.) call" "true"
+
+fun foo(exec: (() -> Unit)?) = exec<caret>()

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvoke.kt.after

@@ -0,0 +1,3 @@
+// "Replace with safe (?.) call" "true"
+
+fun foo(exec: (() -> Unit)?) = exec?.invoke()

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvokeWithReceiver.kt

@@ -0,0 +1,7 @@
+// "Replace with safe (?.) call" "false"
+// ACTION: Convert to block body
+// ACTION: Replace overloaded operator with function call
+// ACTION: Wrap with '?.let { ... }' call
+// ERROR: Reference has a nullable type '(String.() -> Unit)?', use explicit '?.invoke()' to make a function-like call instead
+
+fun foo(exec: (String.() -> Unit)?) = "".exec<caret>()

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -6096,6 +6096,18 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("unsafeInvoke.kt")
+            public void testUnsafeInvoke() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvoke.kt");
+                doTest(fileName);
+            }
+
+            @TestMetadata("unsafeInvokeWithReceiver.kt")
+            public void testUnsafeInvokeWithReceiver() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvokeWithReceiver.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("unsafePlus.kt")
             public void testUnsafePlus() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/nullables/unsafeInfixCall/unsafePlus.kt");