Fix import path for effects operators

Author: zbarbuto

Diff for: src/rxjsPipeableOperatorsOnlyRule.ts

@@ -205,14 +205,21 @@ function findImportedRxjsOperators(sourceFile: ts.SourceFile): Set<string> {
  * @param startIndex Position where the {@link Lint.Replacement} can be inserted
  */
 function createImportReplacements(operatorsToAdd: Set<string>, startIndex: number): Lint.Replacement[] {
-  return [...Array.from(operatorsToAdd.values())].map(operator =>
-    NGRX_OPERATORS.has(operator)
-      ? Lint.Replacement.appendText(startIndex, `\nimport {${operator}} from '@ngrx/store';\n`)
-      : Lint.Replacement.appendText(
-          startIndex,
-          `\nimport {${operator}} from 'rxjs/operators/${operator}';\n`
-        )
-  );
+  return [...Array.from(operatorsToAdd.values())].map(operator => {
+    let importPath: string;
+    if (NGRX_EFFECT_OPERATORS.has(operator)) {
+      importPath = '@ngrx/effects';
+    }
+    if (NGRX_STORE_OPERATORS.has(operator)) {
+      importPath = '@ngrx/store';
+    } else {
+      importPath = `rxjs/operators/${operator}`;
+    }
+    return Lint.Replacement.appendText(
+      startIndex,
+      `\nimport {${operator}} from '${importPath}';\n`
+    );
+  });
 }
 
 /**
@@ -302,7 +309,8 @@ function replaceWithPipeableOperators(
   return [operatorReplacement, ...separatorReplacements, ...moreReplacements];
 }
 
-const NGRX_OPERATORS = new Set(['ofType', 'select']);
+const NGRX_STORE_OPERATORS = new Set(['select']);
+const NGRX_EFFECT_OPERATORS = new Set(['ofType']);
 
 /**
  * Set of all instance operators, including those renamed as part of lettable