feat: add basic util methods

Author: theBenForce

.eslintrc.json

@@ -9,7 +9,7 @@
         "@typescript-eslint"
     ],
     "rules": {
-        "@typescript-eslint/class-name-casing": "warn",
+        "@typescript-eslint/naming-convention": "warn",
         "@typescript-eslint/semi": "warn",
         "curly": "warn",
         "eqeqeq": "warn",

package.json

@@ -117,27 +117,28 @@
 	"devDependencies": {
 		"@semantic-release/changelog": "^5.0.1",
 		"@semantic-release/commit-analyzer": "^8.0.1",
-		"@semantic-release/github": "^7.0.5",
+		"@semantic-release/github": "^7.1.1",
 		"@semantic-release/release-notes-generator": "^9.0.1",
-		"@types/glob": "^7.1.1",
-		"@types/mocha": "^7.0.2",
-		"@types/node": "^13.11.0",
-		"@types/vscode": "^1.44.0",
-		"@typescript-eslint/eslint-plugin": "^2.26.0",
-		"@typescript-eslint/parser": "^2.26.0",
-		"commitizen": "^4.0.4",
-		"cz-conventional-changelog": "^3.1.0",
-		"eslint": "^6.8.0",
+		"@types/glob": "^7.1.3",
+		"@types/mocha": "^8.0.3",
+		"@types/node": "^14.11.1",
+		"@types/vscode": "^1.49.0",
+		"@typescript-eslint/eslint-plugin": "^4.1.1",
+		"@typescript-eslint/parser": "^4.1.1",
+		"commitizen": "^4.2.1",
+		"cz-conventional-changelog": "^3.3.0",
+		"eslint": "^7.9.0",
 		"glob": "^7.1.6",
-		"mocha": "^7.1.1",
-		"prettier": "^2.0.5",
-		"semantic-release": "^17.0.4",
+		"mocha": "^8.1.3",
+		"prettier": "^2.1.2",
+		"semantic-release": "^17.1.2",
 		"semantic-release-vsce": "^3.0.1",
-		"typescript": "^3.8.3",
-		"vsce": "^1.75.0",
-		"vscode-test": "^1.3.0"
+		"typescript": "^4.0.2",
+		"vsce": "^1.79.5",
+		"vscode-test": "^1.4.0"
 	},
 	"dependencies": {
-		"velocityjs": "^2.0.0"
+		"aws-sdk": "^2.755.0",
+		"velocityjs": "^2.0.1"
 	}
 }

src/previewContentProvider.ts

@@ -1,4 +1,5 @@
 import * as vscode from "vscode";
+import {Converter} from "aws-sdk/clients/dynamodb";
 import {render as renderVelocity} from "velocityjs";
 
 function isVelocityFile(document?: vscode.TextDocument): boolean {
@@ -32,7 +33,29 @@ export class VelocityPreviewProvider
 
     const content = editor?.document?.getText() ?? ``;
 
-    return renderVelocity(content);
+    const renderContext = {
+      util: {
+        toJson(vmString: any, context: any): string {
+          return JSON.stringify(vmString);
+        },
+        dynamodb: {
+          toMap(vmString: any, context: any): object {
+            return Converter.input(vmString);
+          },
+          toMapValues(vmString: any, context: any): object {
+            return Converter.marshall(vmString);
+          },
+          toMapJson(vmString: any, context: any): string {
+            return JSON.stringify(Converter.input(vmString));
+          },
+          toMapValuesJson(vmString: any, context: any): string {
+            return JSON.stringify(Converter.marshall(vmString));
+          }
+        }
+      }
+    };
+
+    return renderVelocity(content, renderContext);
   }
 
   async updatePreview() {}

test_templates/dynamo.vtl

@@ -1,5 +1,9 @@
 #set($range = [0..5])
 
+$util.toJson({
+    "foo": "bar"
+})
+
 {
     "test": true
 #foreach($i in $range)