feat(Linear Node): Add Linear Node (#2971)

* ✨ Linear node

* ⚡ Improvements

packages/nodes-base/nodes/Linear/Linear.node.ts

@@ -0,0 +1,258 @@
+import {
+	IExecuteFunctions,
+} from 'n8n-core';
+
+import {
+	ICredentialDataDecryptedObject,
+	ICredentialsDecrypted,
+	ICredentialTestFunctions,
+	IDataObject,
+	ILoadOptionsFunctions,
+	INodeCredentialTestResult,
+	INodeExecutionData,
+	INodePropertyOptions,
+	INodeType,
+	INodeTypeDescription,
+	JsonObject,
+} from 'n8n-workflow';
+
+import {
+	linearApiRequest,
+	linearApiRequestAllItems,
+	sort,
+	validateCrendetials,
+} from './GenericFunctions';
+
+import {
+	issueFields,
+	issueOperations,
+} from './IssueDescription';
+
+import {
+	query,
+} from './Queries';
+interface IGraphqlBody {
+	query: string;
+	variables: IDataObject;
+}
+export class Linear implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Linear',
+		name: 'linear',
+		icon: 'file:linear.svg',
+		group: ['output'],
+		version: 1,
+		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
+		description: 'Consume Linear API',
+		defaults: {
+			name: 'Linear',
+		},
+		inputs: ['main'],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'linearApi',
+				required: true,
+				testedBy: 'linearApiTest',
+			},
+		],
+		properties: [
+			{
+				displayName: 'Resource',
+				name: 'resource',
+				type: 'options',
+				options: [
+					{
+						name: 'Issue',
+						value: 'issue',
+					},
+				],
+				default: 'issue',
+			},
+			...issueOperations,
+			...issueFields,
+		],
+	};
+
+	methods = {
+		credentialTest: {
+			async linearApiTest(this: ICredentialTestFunctions, credential: ICredentialsDecrypted): Promise<INodeCredentialTestResult> {
+				try {
+					await validateCrendetials.call(this, credential.data as ICredentialDataDecryptedObject);
+				} catch (error) {
+					const { error: err } = error as JsonObject;
+					const errors = (err as IDataObject).errors as [{ extensions: { code: string } }];
+					const authenticationError = Boolean(errors.filter(e => e.extensions.code === 'AUTHENTICATION_ERROR').length);
+					if (authenticationError) {
+						return {
+							status: 'Error',
+							message: 'The security token included in the request is invalid',
+						};
+					}
+				}
+
+				return {
+					status: 'OK',
+					message: 'Connection successful!',
+				};
+			},
+		},
+		loadOptions: {
+			async getTeams(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+				const returnData: INodePropertyOptions[] = [];
+				const body = {
+					query: query.getTeams(),
+					variables: {
+						$first: 10,
+					},
+				};
+				const teams = await linearApiRequestAllItems.call(this, 'data.teams', body);
+
+				for (const team of teams) {
+					returnData.push({
+						name: team.name,
+						value: team.id,
+					});
+				}
+				return returnData;
+			},
+			async getUsers(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+				const returnData: INodePropertyOptions[] = [];
+				const body = {
+					query: query.getUsers(),
+					variables: {
+						$first: 10,
+					},
+				};
+				const users = await linearApiRequestAllItems.call(this, 'data.users', body);
+
+				for (const user of users) {
+					returnData.push({
+						name: user.name,
+						value: user.id,
+					});
+				}
+				return returnData;
+			},
+			async getStates(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+				const returnData: INodePropertyOptions[] = [];
+				const body = {
+					query: query.getStates(),
+					variables: {
+						$first: 10,
+					},
+				};
+				const states = await linearApiRequestAllItems.call(this, 'data.workflowStates', body);
+
+				for (const state of states) {
+					returnData.push({
+						name: state.name,
+						value: state.id,
+					});
+				}
+				return returnData.sort(sort);
+			},
+		},
+	};
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		const items = this.getInputData();
+		const returnData: IDataObject[] = [];
+		const length = items.length as unknown as number;
+		let responseData;
+		const qs: IDataObject = {};
+		const resource = this.getNodeParameter('resource', 0) as string;
+		const operation = this.getNodeParameter('operation', 0) as string;
+		for (let i = 0; i < length; i++) {
+			try {
+				if (resource === 'issue') {
+					if (operation === 'create') {
+						const teamId = this.getNodeParameter('teamId', i) as string;
+						const title = this.getNodeParameter('title', i) as string;
+						const additionalFields = this.getNodeParameter('additionalFields', i) as IDataObject;
+						const body: IGraphqlBody = {
+							query: query.createIssue(),
+							variables: {
+								teamId,
+								title,
+								...additionalFields,
+							},
+						};
+
+						responseData = await linearApiRequest.call(this, body);
+						responseData = responseData.data.issueCreate?.issue;
+					}
+					if (operation === 'delete') {
+						const issueId = this.getNodeParameter('issueId', i) as string;
+						const body: IGraphqlBody = {
+							query: query.deleteIssue(),
+							variables: {
+								issueId,
+							},
+						};
+
+						responseData = await linearApiRequest.call(this, body);
+						responseData = responseData?.data?.issueDelete;
+					}
+					if (operation === 'get') {
+						const issueId = this.getNodeParameter('issueId', i) as string;
+						const body: IGraphqlBody = {
+							query: query.getIssue(),
+							variables: {
+								issueId,
+							},
+						};
+
+						responseData = await linearApiRequest.call(this, body);
+						responseData = responseData.data?.issues?.nodes[0];
+					}
+					if (operation === 'getAll') {
+						const returnAll = this.getNodeParameter('returnAll', i) as boolean;
+						const body: IGraphqlBody = {
+							query: query.getIssues(),
+							variables: {
+								first: 50,
+							},
+						};
+						if (returnAll) {
+							responseData = await linearApiRequestAllItems.call(this, 'data.issues', body);
+						} else {
+							const limit = this.getNodeParameter('limit', 0) as number;
+							body.variables.first = limit;
+							responseData = await linearApiRequest.call(this, body);
+							responseData = responseData.data.issues.nodes;
+						}
+					}
+					if (operation === 'update') {
+						const issueId = this.getNodeParameter('issueId', i) as string;
+						const updateFields = this.getNodeParameter('updateFields', i) as IDataObject;
+						const body: IGraphqlBody = {
+							query: query.updateIssue(),
+							variables: {
+								issueId,
+								...updateFields,
+							},
+						};
+
+						responseData = await linearApiRequest.call(this, body);
+						responseData = responseData?.data?.issueUpdate?.issue;
+					}
+				}
+				if (Array.isArray(responseData)) {
+					returnData.push.apply(returnData, responseData as IDataObject[]);
+				} else {
+					returnData.push(responseData as IDataObject);
+				}
+			} catch (error) {
+				if (this.continueOnFail()) {
+					returnData.push({
+						error: (error as JsonObject).message,
+					});
+					continue;
+				}
+				throw error;
+			}
+		}
+		return [this.helpers.returnJsonArray(returnData)];
+	}
+}