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# UML Diagram
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## Use Case Model
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# Actors
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- User
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- Farmer
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- System
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- Payment Gateway
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# Use Cases
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- Register/Login
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- Browse Products
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- Place Order
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- View Farmer Profile
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- Leave Review
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- View Order History
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# Use Case: Place Order
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## Actors
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- Consumer
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- System
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- Payment Gateway
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## Preconditions
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- User must be logged in.
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- Cart must contain products.
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## Steps
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1. User selects "Proceed to Checkout."
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2. System calculates total cost.
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3. User enters payment details.
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4. Payment Gateway validates payment.
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5. System confirms the order and provides a summary.
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## Postconditions
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- Order is recorded.
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- User receives confirmation.
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### 1. *User Registration*
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- *Actors:* Consumer
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- *Preconditions:* User has internet access.
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- *Postconditions:* User has an account and can log in.
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- *Main Flow:*
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1. User navigates to the sign-in/sign-up page.
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2. User fills out the registration form (name, email, password).
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3. User submits the form.
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4. System confirms registration and directs the user to their profile.
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---
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# Use Case: Register/Login
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## Actors
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- User
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## Preconditions
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- The user must have access to the internet.
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## Postconditions
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- A user account is created, or the user is logged in to access their profile and features.
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## Main Flow
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1. User navigates to the registration or login page.
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2. User enters required information:
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- For login: email and password.
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- For registration: email, password, and additional details like name.
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3. The system validates the input.
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4. For registration:
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- The system stores user information.
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- The system sends a confirmation email.
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5. The user is redirected to their profile/dashboard.
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---
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# Use Case: Browse Products
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### 2. *Product Search and Order Placement*
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- *Actors:* Consumer
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- *Preconditions:* User is logged in.
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- *Postconditions:* User has successfully placed an order.
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- *Main Flow:*
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1. User navigates to the product catalog.
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2. User searches for a specific product or browses categories.
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3. User adds desired items to the cart.
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4. User reviews the cart and proceeds to checkout.
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5. User enters payment information and confirms the order.
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## Actors
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- User
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## Preconditions
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- The user is logged in to the system.
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## Postconditions
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- The user views available products, filtered and sorted as needed.
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## Main Flow
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1. User navigates to the product catalog.
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2. User browses the catalog or enters keywords in the search bar.
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3. User applies filters (e.g., product category, price range) and sorts products (e.g., by price or availability).
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4. System displays the filtered/sorted results.
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5. User selects a product for more details.
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---
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# Use Case: Leave Review
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### 3. *Farmer Profile and Review*
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- *Actors:* Consumer
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- *Preconditions:* User is logged in and has purchased from a farmer.
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- *Postconditions:* User has submitted a review.
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- *Main Flow:*
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1. User navigates to the farmer’s profile page.
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2. User reads information about the farmer and their practices.
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3. User clicks on the review section.
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4. User submits a rating and a written review.
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5. System updates the farmer’s profile with the new review.
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## Actors
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- User
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## Preconditions
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- The user has completed a purchase from a farmer.
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## Postconditions
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- The system records the user’s review and updates the farmer’s profile.
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## Main Flow
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1. User navigates to the farmer's profile or order history.
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2. User selects "Leave a Review."
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3. User enters a star rating and optional written feedback.
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4. System validates the review and adds it to the farmer’s profile.
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5. Other users can view the submitted review.
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---
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# Justifications
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### 1. *User Registration and Profiles*
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- *Justification:* Enhances user engagement by personalizing the shopping experience, making it easier for users to return and reorder.
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