Merge pull request #13 from juanmacebal/add-json-support

added support for JSON format in global constants input

Author: umanamente

README.md

@@ -17,9 +17,16 @@ This node uses N8N Credential to store the global variables.
 1. Add "`Global Constants`" node to your workflow.
    ![Global Constants node](./docs/images/usage/1_select_node.png)
 2. In the node configuration, either select an existing credential or create a new one.
-3. Add the key-value pairs you want to use as global constants.
-   ![Define constants](./docs/images/usage/2_define_constants.png)
-4. Use the global constants in your workflow
-	 ![Use constants](./docs/images/usage/3_use_node.png)
-
+3. Select the format for your global constants:
+   - Key-value pairs format: Use "name=value" pairs, one per line
+   - JSON format: Provide constants as a JSON object
+4. Add your constants according to the chosen format:
+   
+   KeyKey-value pairs
+   ![Define constants String](./docs/images/usage/2_define_constants_string.png)
+
+   JSON
+   ![Define constants](./docs/images/usage/2_define_constants_json.png)
+5. Use the global constants in your workflow
+   ![Use constants](./docs/images/usage/3_use_node.png)
 

credentials/CredentialsUtils.ts

@@ -1,19 +1,27 @@
 export function splitConstants(globalConstantsMultiline: string): { [key: string]: string } {
-  const lines = globalConstantsMultiline.split('\n');
-  var retArr: { [key: string]: string } = {};
-  for (const line of lines) {
-    // trim the line
-    const constant = line.trim();
-    if (!constant) {
-      continue;
+
+  // Check if the string is a JSON object
+  try {
+    const jsonObj = JSON.parse(globalConstantsMultiline.trim());
+    return jsonObj as { [key: string]: string };
+  } catch (e) {
+    // Not a JSON object, continue with the old logic
+    const lines = globalConstantsMultiline.split('\n');
+    var retArr: { [key: string]: string } = {};
+    for (const line of lines) {
+      // trim the line
+      const constant = line.trim();
+      if (!constant) {
+        continue;
+      }
+      // skip if it doesn't contain "="
+      if (!constant.includes('=')) {
+        continue;
+      }
+      // split only first "=" to allow values with "=" in them
+      const [name, ...value] = constant.split('=');
+      retArr[name.trim()] = value.join('=').trim();
     }
-    // skip if it doesn't contain "="
-    if (!constant.includes('=')) {
-      continue;
-    }
-    // split only first "=" to allow values with "=" in them
-    const [name, ...value] = constant.split('=');
-    retArr[name.trim()] = value.join('=').trim();
+    return retArr;
   }
-  return retArr;
 }

credentials/GlobalConstantsCredentials.credentials.ts

@@ -9,6 +9,23 @@ export class GlobalConstantsCredentials implements ICredentialType {
 	displayName = 'Global Constants';
 
 	properties: INodeProperties[] = [
+		{
+			displayName: 'Format',
+			name: 'format',
+			type: 'options',
+			options: [
+				{
+					name: 'Key-value pairs',
+					value: 'string',
+				},
+				{
+					name: 'JSON',
+					value: 'json',
+				},
+			],
+			default: 'string',
+			description: 'Choose the format for your global constants',
+		},
 		{
 			displayName: 'Global Constants',
 			name: 'globalConstants',
@@ -19,10 +36,28 @@ export class GlobalConstantsCredentials implements ICredentialType {
 			typeOptions: {
 				rows: 10,
 			},
+			displayOptions: {
+				show: {
+					format: ['string'],
+				},
+			},
+		},
+		{
+			displayName: 'Global Constants',
+			name: 'globalConstants',
+			type: 'json',
+			default: '{}',
+			hint: 'Provide your constants as a JSON object. Example: { "obj": { "key": "value" }, "list": ["value1", "value2"] }',
+			displayOptions: {
+				show: {
+					format: ['json'],
+				},
+			},
 		},
 	];
 }
 
 export interface GlobalConstantsCredentialsData {
+	format: 'string' | 'json';
 	globalConstants: string;
 }