refactor(dashboard): the chart component is now cleaned up and easier to extend

apps/dashboard/src/components/report-chart/common/previous-diff-indicator.tsx

@@ -0,0 +1,92 @@
+import { useNumber } from '@/hooks/useNumerFormatter';
+import { cn } from '@/utils/cn';
+import { ArrowDownIcon, ArrowUpIcon } from 'lucide-react';
+
+import { useReportChartContext } from '../context';
+
+export function getDiffIndicator<A, B, C>(
+  inverted: boolean | undefined,
+  state: string | undefined | null,
+  positive: A,
+  negative: B,
+  neutral: C
+): A | B | C {
+  if (state === 'neutral' || !state) {
+    return neutral;
+  }
+
+  if (inverted === true) {
+    return state === 'positive' ? negative : positive;
+  }
+  return state === 'positive' ? positive : negative;
+}
+
+// TODO: Fix this mess!
+
+interface PreviousDiffIndicatorProps {
+  diff?: number | null | undefined;
+  state?: string | null | undefined;
+  children?: React.ReactNode;
+  inverted?: boolean;
+  className?: string;
+  size?: 'sm' | 'lg';
+}
+
+export function PreviousDiffIndicator({
+  diff,
+  state,
+  inverted,
+  size = 'sm',
+  children,
+  className,
+}: PreviousDiffIndicatorProps) {
+  const {
+    report: { previousIndicatorInverted, previous },
+  } = useReportChartContext();
+  const variant = getDiffIndicator(
+    inverted ?? previousIndicatorInverted,
+    state,
+    'bg-emerald-300',
+    'bg-rose-300',
+    undefined
+  );
+  const number = useNumber();
+
+  if (diff === null || diff === undefined || previous === false) {
+    return children ?? null;
+  }
+
+  const renderIcon = () => {
+    if (state === 'positive') {
+      return <ArrowUpIcon strokeWidth={3} size={10} color="#000" />;
+    }
+    if (state === 'negative') {
+      return <ArrowDownIcon strokeWidth={3} size={10} color="#000" />;
+    }
+    return null;
+  };
+
+  return (
+    <>
+      <div
+        className={cn(
+          'flex items-center gap-1 font-mono font-medium',
+          size === 'lg' && 'gap-2',
+          className
+        )}
+      >
+        <div
+          className={cn(
+            `flex size-4 items-center justify-center rounded-full`,
+            variant,
+            size === 'lg' && 'size-8'
+          )}
+        >
+          {renderIcon()}
+        </div>
+        {number.format(diff)}%
+      </div>
+      {children}
+    </>
+  );
+}