#39 created post request for notes

takeNotes-src/postNote/.prettierignore

@@ -0,0 +1,106 @@
+*.DS_Store
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
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+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
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+*.tgz
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+# TernJS port file
+.tern-port

takeNotes-src/postNote/app.js

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+// default imports
+const AWS = require("aws-sdk");
+const DDB = new AWS.DynamoDB({ apiVersion: "2012-10-08" });
+const { v4: uuidv4 } = require("uuid");
+
+// environment variables
+const { TABLE_NAME, ENDPOINT_OVERRIDE, REGION } = process.env;
+const options = { region: REGION };
+AWS.config.update({ region: REGION });
+
+if (ENDPOINT_OVERRIDE !== "") {
+  options.endpoint = ENDPOINT_OVERRIDE;
+}
+
+const docClient = new AWS.DynamoDB.DocumentClient(options);
+
+// response helper
+const response = (statusCode, body, additionalHeaders) => ({
+  statusCode,
+  body: JSON.stringify(body),
+  headers: {
+    "Content-Type": "application/json",
+    "Access-Control-Allow-Origin": "*",
+    ...additionalHeaders,
+  },
+});
+
+function isValidRequest(context, event) {
+  let isIdValid =
+    event !== null &&
+    event.pathParameters !== null &&
+    event.pathParameters.id !== null;
+
+  let body = event.body;
+  let isBodyValid = body !== null && body.notes !== null;
+
+  return isIdValid && isBodyValid;
+}
+
+function updateRecord(recordId, eventBody, id) {
+  let d = new Date();
+  console.log("record id: " + recordId + " eventBody: " + eventBody.notes);
+  let noteBody = eventBody.note;
+
+  const metaFields = {
+    id: id,
+    created: d.toISOString(),
+    updated: d.toISOString(),
+  };
+
+  const note = { ...metaFields, ...noteBody };
+  const params = {
+    TableName: TABLE_NAME,
+    Key: {
+      id: recordId,
+    },
+    UpdateExpression: `set updated = :u, docBody.notes.#noteId = :n`,
+    ExpressionAttributeNames: { "#noteId": id },
+    ExpressionAttributeValues: {
+      ":u": d.toISOString(),
+      ":n": note,
+    },
+    ConditionExpression: "attribute_not_exists(docBody.notes.#noteId)",
+    ReturnValues: "ALL_NEW",
+  };
+  console.log("params: " + params);
+  return docClient.update(params);
+}
+
+// Lambda Handler
+exports.postNote = async (event, context, callback) => {
+  console.log("event: " + event);
+  console.log("body: " + event.body);
+  if (!isValidRequest(context, event)) {
+    return response(400, { message: "Error: Invalid request" });
+  }
+
+  try {
+    const id = uuidv4();
+    let data = await updateRecord(
+      event.pathParameters.id,
+      JSON.parse(event.body),
+      id
+    ).promise();
+    return response(200, { data: data, id: id });
+  } catch (err) {
+    return response(500, { message: err.message });
+  }
+};

takeNotes-src/postNote/package.json

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+{
+  "name": "post",
+  "version": "1.0.0",
+  "description": "POST handler for TakeNotes users API",
+  "main": "src/app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "style": "npx prettier --write ."
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "aws-sdk": "^2.834.0",
+    "uuid": "^8.3.2"
+  }
+}

template.yaml

@@ -124,6 +124,31 @@ Resources:
             RestApiId: !Ref TakeNotesApi
             Auth:
               Authorizer: CognitoAuthorizer
+  PostTakeNotesUserNotes:
+    Type: AWS::Serverless::Function
+    Properties:
+      CodeUri: takeNotes-src/postNote/
+      Handler: app.postNote
+      Tracing: Active
+      Policies:
+        - DynamoDBCrudPolicy:
+            TableName: !Ref TakeNotesTable
+        - CloudWatchPutMetricPolicy: {}
+      Environment:
+        Variables:
+          TABLE_NAME: !Ref TakeNotesTable
+          AWS_NODEJS_CONNECTION_REUSE_ENABLED: "1"
+          ENDPOINT_OVERRIDE: ""
+          REGION: !Ref AWS::Region
+      Events:
+        PostNote:
+          Type: Api
+          Properties:
+            Path: /users/{id}/notes/
+            Method: POST
+            RestApiId: !Ref TakeNotesApi
+            Auth:
+              Authorizer: CognitoAuthorizer
   PutTakeNotesUser:
     Type: AWS::Serverless::Function
     Properties: