Feat: fileName replace variable (#2803)

* Created `fileName` replace variable

src/backend/variables/builtin/utility/file-name.ts

@@ -0,0 +1,30 @@
+import { ReplaceVariable, Trigger } from "../../../../types/variables";
+import { OutputDataType, VariableCategory } from "../../../../shared/variable-constants";
+import { basename, extname } from "path";
+
+const model : ReplaceVariable = {
+    definition: {
+        handle: "fileName",
+        usage: 'fileName[path\\to\\file.txt]',
+        description: "Returns name of file without extension.",
+        categories: [VariableCategory.ADVANCED],
+        possibleDataOutput: [OutputDataType.TEXT]
+    },
+    evaluator: (
+        trigger: Trigger,
+        filePath?: string
+    ) : string => {
+        if (!filePath) {
+            return "";
+        }
+
+        try {
+            return basename(filePath, extname(filePath));
+        } catch (err) {
+            // Probably a directory or invalid filename
+            return "[Invalid File Path]";
+        }
+    }
+};
+
+export default model;

src/backend/variables/builtin/utility/index.ts

@@ -7,6 +7,7 @@ import evalJS from './eval-js';
 import evalVars from './eval-vars';
 import fileExists from './file-exists';
 import fileLineCount from './file-line-count';
+import fileName from './file-name';
 import fileRead from './file-read';
 import filesInDirectory from './files-in-directory';
 import getEffectQueueLength from "./get-effect-queue-length";
@@ -27,6 +28,7 @@ export default [
     evalVars,
     fileExists,
     fileLineCount,
+    fileName,
     fileRead,
     filesInDirectory,
     getEffectQueueLength,