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packages/nodes-base/nodes/PostBin/GenericFunctions.ts

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+import type {
+	IExecuteSingleFunctions,
+	IHttpRequestOptions,
+	IN8nHttpFullResponse,
+	INodeExecutionData,
+} from 'n8n-workflow';
+import { NodeApiError } from 'n8n-workflow';
+
+// Regular expressions used to extract binId from parameter value
+const BIN_ID_REGEX = /\b\d{13}-\d{13}\b/g;
+
+/**
+ * Extracts the PostBin Bin Id from the specified string.
+ * This method should be able to extract bin Id from the
+ * PostBin URL or from the string in the following format:
+ * `Bin '<binId>'.`
+ *
+ */
+function parseBinId(context: IExecuteSingleFunctions) {
+	const binId = context.getNodeParameter('binId') as string;
+	// Test if the Bin id is in the expected format
+	BIN_ID_REGEX.lastIndex = 0;
+	const idMatch = BIN_ID_REGEX.exec(binId);
+
+	// Return what is matched
+	if (idMatch) {
+		return idMatch[0];
+	}
+
+	// If it's not recognized, error out
+	throw new NodeApiError(
+		context.getNode(),
+		{},
+		{
+			message: 'Bin ID format is not valid',
+			description: 'Please check the provided Bin ID and try again.',
+			parseXml: false,
+		},
+	);
+}
+
+/**
+ * Creates correctly-formatted PostBin API URL based on the entered binId.
+ * This function makes sure binId is in the expected format by parsing it
+ * from current node parameter value.
+ *
+ */
+export async function buildBinAPIURL(
+	this: IExecuteSingleFunctions,
+	requestOptions: IHttpRequestOptions,
+): Promise<IHttpRequestOptions> {
+	const binId = parseBinId(this);
+	// Assemble the PostBin API URL and put it back to requestOptions
+	requestOptions.url = `/api/bin/${binId}`;
+
+	return requestOptions;
+}
+
+/**
+ * Creates correctly-formatted PostBin Bin test URL based on the entered binId.
+ * This function makes sure binId is in the expected format by parsing it
+ * from current node parameter value.
+ *
+ */
+export async function buildBinTestURL(
+	this: IExecuteSingleFunctions,
+	requestOptions: IHttpRequestOptions,
+): Promise<IHttpRequestOptions> {
+	const binId = parseBinId(this);
+
+	// Assemble the PostBin API URL and put it back to requestOptions
+	requestOptions.url = `/${binId}`;
+	return requestOptions;
+}
+
+/**
+ * Creates correctly-formatted PostBin API URL based on the entered binId and reqId.
+ * This function makes sure binId is in the expected format by parsing it
+ * from current node parameter value.
+ *
+ */
+export async function buildRequestURL(
+	this: IExecuteSingleFunctions,
+	requestOptions: IHttpRequestOptions,
+): Promise<IHttpRequestOptions> {
+	const reqId = this.getNodeParameter('requestId', 'shift') as string;
+	const binId = parseBinId(this);
+
+	requestOptions.url = `/api/bin/${binId}/req/${reqId}`;
+	return requestOptions;
+}
+
+/**
+ * Converts the bin response data and adds additional properties
+ *
+ */
+export async function transformBinResponse(
+	this: IExecuteSingleFunctions,
+	items: INodeExecutionData[],
+	_response: IN8nHttpFullResponse,
+): Promise<INodeExecutionData[]> {
+	items.forEach(
+		(item) =>
+			(item.json = {
+				binId: item.json.binId,
+				nowTimestamp: item.json.now,
+				nowIso: new Date(item.json.now as string).toISOString(),
+				expiresTimestamp: item.json.expires,
+				expiresIso: new Date(item.json.expires as string).toISOString(),
+				requestUrl: 'https://www.postb.in/' + (item.json.binId as string),
+				viewUrl: 'https://www.postb.in/b/' + (item.json.binId as string),
+			}),
+	);
+	return items;
+}