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import Category from "../../types/category";
import './Histogram.scss';
function Histogram({ categories }: Props) {
const maxAbsBalanceToBudgetRatio = Math.max(
...categories.map((c) => Math.abs(c.balanceToBudgetRatio))
);
return (
<table>
<thead>
<tr>
<th>Category</th>
<th>Balance-to-Budget Ratio</th>
<th>Balance</th>
</tr>
</thead>
<tbody>
{
categories
.sort((c1, c2) => c1.balanceToBudgetRatio - c2.balanceToBudgetRatio)
.map((category) => Row({ category, maxAbsBalanceToBudgetRatio }))
}
</tbody>
</table>
);
}
function Row({ category, maxAbsBalanceToBudgetRatio }: RowProps) {
const normalisedRatio = category.balanceToBudgetRatio / maxAbsBalanceToBudgetRatio;
const variant = getRowVariant(new Number(normalisedRatio).valueOf());
return (
<tr>
<td class="name">{category.name}</td>
<td
class={`ratio ratio--${variant}`}
style={`--normal-abs-ratio: ${Math.abs(normalisedRatio)};`}
>
<span class="ratio__text">
{category.balanceToBudgetRatio.toFixed(2)}
</span>
<span class="ratio__bar"></span>
</td>
<td class="balance">{category.currentBalance.toString()}</td>
</tr>
);
}
function getRowVariant(balanceToBudgetRatio: number) {
if (balanceToBudgetRatio < 0) {
return 'arrears';
}
if (balanceToBudgetRatio >= 1) {
return 'spend';
}
return 'save';
}
type Props = {
categories: Category[],
};
type RowProps = {
category: Category,
maxAbsBalanceToBudgetRatio: number,
};
export default Histogram;
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