Co2 footprint calculation page

[kneerunjun]

• [x] IS able to take inputs from the user
• [x] Is able to respond with answers - emissions and footprint
• [x] accessible from top navigation
• [x] accessing the page gets you all 0 values
• [ ] handles errors on the back - shows legible error message on the front
• [x] flag for vegetarian, calculations that do not consider fish as food

[kneerunjun]

All the elements on the form would look better with

<div class="form-group">
  <label class="control-label">Input addons</label>
  <div class="form-group">
    <div class="input-group mb-3">
      <div class="input-group-prepend">
        <span class="input-group-text">$</span>
      </div>
      <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
      <div class="input-group-append">
        <span class="input-group-text">.00</span>
      </div>
    </div>
  </div>
</div>

[kneerunjun]

Error condition for plant yield not handled

// this can be calculated for vegeterian as well, in that case only the plant yeild is considered
        if result.Vegeterian != "on" {
            if result.PlantYeildKgs != 0 {
                result.Footprint = result.Emissions / result.PlantYeildKgs
            } 
        } else {
            result.Footprint = result.Emissions / (result.FishYeildKgs + result.PlantYeildKgs)
        }

[kneerunjun]

c.Set("content", &ResultOrErr{
   Result: nil,
   Err:    &InvalidArgument{Err: fmt.Errorf("Plant yield for calculating Co2 footprint cannot be zero")},
})
return

Its much better to send the content as ResultOrErr To page dispatch as this then can render the error page correctly