LetsMeet

LetsMeet is a meetup / workshop / event organizer and handler site, where you can post your coming events and interact with others. Lets organize your next futuristic tech event or any other what comes to your mind.

Tech Stack - Backend

• .NET 5
• Mediator Pattern (MediatR)
• FluentValidation
• SignalR
• AutoMapper
• NLog
• Swagger
• Entity Framework Core
• Identity and Authentication
• Security with JSON Web Token
• Cloudinary
• SendGrid

Tech Stack - Frontend

• React
• Semantic UI React
• Axios
• MobX
• React-Calendar
• React-Datepicker
• React-Cropper
• React-Dropzone
• React-Infinite-Scroller
• React-Toastify
• Formik

Mediator Pattern

Imagine an application in which there are many objects that are communicating with each other. The mediator design pattern is useful when the number of objects grows so large that it becomes difficult to maintain the references to the objects. The mediator is essentially an object that encapsulates how one or more objects interact with each other. The mediator design pattern controls how these objects communicate, and helps to reduce the number of dependencies among them that you have to manage.

In the mediator design pattern, the objects don’t communicate with one another directly but through the mediator. When an object needs to communicate with another object or a set of objects, it transmits the message to the mediator. The mediator then transmits the message to each receiver object in a form that is understandable to it.

By eliminating the direct communication between objects, the mediator design pattern promotes loose coupling. The other benefit of using the mediator design pattern is that it improves code readability and maintainability.

SignalR

ASP.NET SignalR is a library for ASP.NET developers that makes it incredibly simple to add real-time web functionality to your applications. What is "real-time web" functionality? It's the ability to have your server-side code push content to the connected clients as it happens, in real-time.

Endpoints of the Backend

Entity	Type	URL	Description	Success	Authorize
Activity	GET	/api/activities	Get all activities with pagination.	200 OK	Yes
	GET	/api/activities?pageSize=2&pageNumber=2	Get all activities with 2 activities per page and get the second page of activities.	200 OK	Yes
	GET	/api/activities?isgoing=true	Activities of the logged in user where he/she is going.	200 OK	Yes
	GET	/api/activities?ishost=true	Activities of the logged in user where he/she is the host of this activities.	200 OK	Yes
	GET	/api/activities?startDate=2021-04-08	Get all upcoming activities from this start date.	200 OK	Yes
	GET	/api/activities?startDate=2021-04-14&isGoing=true	Get all upcoming activities from this start date where the logged in user going.	200 OK	Yes
	GET	/api/activities/{id}	Get the activity by Id.	200 OK	Yes
	POST	/api/activities	Create an activity.	200 OK	Yes
	PUT	/api/activities/{id}	Update an activity.	200 OK	Yes & Logged in user is the host.
	DELETE	/api/activities/{id}	Delete an activity.	200 OK	Yes & Logged in user is the host.
	POST	/api/activities/{id}/attend	Subscribe to an activity / Unsubscribe from an activity.	200 OK	Yes
User	POST	/api/account/login	User Login.	200 OK & Token	No
	POST	/api/account/fbLogin?accessToken={accessToken}	User log in with Facebook	200 OK	No
	POST	/api/account/register	User registration.	200 OK	No
	GET	/api/account	Get the current logged in user information like token, main image etc...	200 OK	Yes & Only the logged in user.
	POST	/api/account/verifyEmail?token={token}&email={email}	Email address verification.	200 OK & Then you can log in	No
	GET	/api/account/resendEmailConfirmationLink?email={email}	Resend email address verification email with the link.	200 OK	No
	POST	/api/account/passwordReset?token={token}&email={email}	Password Reset with the new Password in the body.	200 OK	No
	GET	/api/account/passwordResetRequest?email={email}	Password reset request (Get an email with the link to reset the password.)	200 OK	No
	POST	/api/account/refreshToken	User token refresh.	200 OK	Yes
User Photo	POST	/api/photos	Upload a photo.	200 OK	Yes
	DELETE	/api/photos/{photo id}	Delete a photo, the user cannot delete the current main photo.	200 OK	Yes
	PUT	/api/photos/{photo id}/setmain	Set the photo to main. (Only one main - profile picture.)	200 OK	Yes
User Profile	GET	/api/profiles/{username}	Get the profile information about the user by the username.	200 OK	Yes
	PUT	/api/profiles	Update the profile information. (Only "Bio" and "DisplayName")	200 OK	Yes
	GET	/api/profiles/{username}/activities?predicate=past	Get the user past activities.	200 OK	Yes
	GET	/api/profiles/{username}/activities?predicate=future	Get the user future activities.	200 OK	Yes
	GET	/api/profiles/{username}/activities?predicate=hosting	Get the activities where this user is the host.	200 OK	Yes
User Follow	POST	/api/follow/{username}	Follow this user.	200 OK	Yes
	GET	/api/follow/{username}?predicate=following	Get the followings of this user.	200 OK	Yes
	GET	/api/follow/{username}?predicate=followers	Get the followers of this user.	200 OK	Yes