Add functionality to add new computers via the web interface

[MRID0007]

Description:

This pull request introduces the functionality to add new computers via the web interface, enhancing the usability of the GO-REST-WOL application. Below is a detailed description of the changes made:

1. Front-end Changes (pages/index.html):

• New Form for Adding Computers:

  • Added an HTML form to allow users to input the name, MAC address, and broadcast IP address of a new computer.
  • The form includes the following fields:
    • Computer Name
    • MAC Address
    • Broadcast IP Address

• JavaScript for Form Handling:

  • Implemented a JavaScript function to handle the form submission.
  • The function sends a POST request to the /api/add/computer endpoint with the new computer details.
  • If the request is successful, a success message "Computer added successfully" is displayed, and the new computer is added to the table dynamically.

• Snackbar Notifications:

  • Updated the snackbar notification mechanism to display appropriate success or error messages based on the response from the server.

<form id="newComputerForm">
  <div class="form-group">
    <label for="computerName">Computer Name</label>
    <input type="text" class="form-control" id="computerName" placeholder="Enter computer name" required>
  </div>
  <div class="form-group">
    <label for="macAddress">MAC Address</label>
    <input type="text" class="form-control" id="macAddress" placeholder="Enter MAC address" required>
  </div>
  <div class="form-group">
    <label for="broadcastIp">Broadcast IP Address</label>
    <input type="text" class="form-control" id="broadcastIp" placeholder="Enter broadcast IP address" required>
  </div>
  <button type="submit" class="btn btn-primary">Add Computer</button>
</form>

2. Back-end Changes:

rest.go:

• New Endpoint for Adding Computers:
  • Added a new REST API endpoint /api/add/computer to handle POST requests for adding new computers.
  • The handler function restAddComputer processes the incoming request, appends the new computer to the list, and saves the updated list to the CSV file.

// restAddComputer - REST Handler for adding a new computer
func restAddComputer(w http.ResponseWriter, r *http.Request) {
  w.Header().Set("Content-Type", "application/json")

  var newComputer Computer
  if err := json.NewDecoder(r.Body).Decode(&newComputer); err != nil {
    http.Error(w, err.Error(), http.StatusBadRequest)
    return
  }

  // Append the new computer to the list
  ComputerList = append(ComputerList, newComputer)

  // Save the updated list to the CSV file
  if err := saveComputerList(DefaultComputerFilePath, ComputerList); err != nil {
    http.Error(w, err.Error(), http.StatusInternalServerError)
    return
  }

  // Return success message
  response := WakeUpResponseObject{
    Success: true,
    Message: "Computer added successfully",
    ErrorObject: nil,
  }
  json.NewEncoder(w).Encode(response)
}

main.go:

• Registering the New Endpoint:
  • Registered the new /api/add/computer endpoint in the HTTP router.

// Define route for adding a new computer
router.HandleFunc("/api/add/computer", restAddComputer).Methods("POST")

data.go:

• Function to Save Computer List to CSV:
  • Implemented a function saveComputerList to save the updated computer list to the computer.csv file.

// SaveComputerList saves the computer list to a CSV file
func saveComputerList(computerCsvFilePath string, computers []Computer) error {
  file, err := os.OpenFile(computerCsvFilePath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
  if err != nil {
    return err
  }
  defer file.Close()

  return gocsv.MarshalFile(&computers, file)
}

3. Testing:

• Local Testing:

  • Built and tested the Docker image locally to ensure the new functionality works as expected.
  • Verified that new computers can be added via the web interface and the Wake-on-LAN functionality remains operational.

• Synology NAS Testing:

  • Deployed and tested the updated application on a Synology NAS to replicate the production environment.
  • Confirmed that the new functionality works seamlessly in this environment as well.

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By merging this pull request, you will enable users to add new computers via the web interface, improving the overall usability and functionality of the GO-REST-WOL application.