Refactor DeesTable component: modularize data handling and styles

- Moved column computation and data retrieval logic to a new data.ts file for better separation of concerns.
- Created a styles.ts file to encapsulate all CSS styles related to the DeesTable component.
- Updated the DeesTable class to utilize the new data handling functions and styles.
- Introduced selection and filtering features, allowing for single and multi-row selection.
- Enhanced rendering logic to accommodate selection checkboxes and filtering capabilities.
- Re-exported types from types.ts for better type management and clarity.

ts_web/elements/dees-table/data.ts

@@ -0,0 +1,78 @@
+import type { Column, TDisplayFunction } from './types.js';
+
+export function computeColumnsFromDisplayFunction<T>(
+  displayFunction: TDisplayFunction<T>,
+  data: T[]
+): Column<T>[] {
+  if (!data || data.length === 0) return [];
+  const firstTransformedItem = displayFunction(data[0]);
+  const keys: string[] = Object.keys(firstTransformedItem);
+  return keys.map((key) => ({
+    key,
+    header: key,
+    value: (row: T) => displayFunction(row)[key],
+  }));
+}
+
+export function computeEffectiveColumns<T>(
+  columns: Column<T>[] | undefined,
+  augmentFromDisplayFunction: boolean,
+  displayFunction: TDisplayFunction<T>,
+  data: T[]
+): Column<T>[] {
+  const base = (columns || []).slice();
+  if (!augmentFromDisplayFunction) return base;
+  const fromDisplay = computeColumnsFromDisplayFunction(displayFunction, data);
+  const existingKeys = new Set(base.map((c) => String(c.key)));
+  for (const col of fromDisplay) {
+    if (!existingKeys.has(String(col.key))) {
+      base.push(col);
+    }
+  }
+  return base;
+}
+
+export function getCellValue<T>(row: T, col: Column<T>, displayFunction?: TDisplayFunction<T>): any {
+  return col.value ? col.value(row) : (row as any)[col.key as any];
+}
+
+export function getViewData<T>(
+  data: T[],
+  effectiveColumns: Column<T>[],
+  sortKey?: string,
+  sortDir?: 'asc' | 'desc' | null,
+  filterText?: string
+): T[] {
+  let arr = data.slice();
+  const ft = (filterText || '').trim().toLowerCase();
+  if (ft) {
+    arr = arr.filter((row) => {
+      for (const col of effectiveColumns) {
+        if (col.hidden) continue;
+        const val = getCellValue(row, col);
+        const s = String(val ?? '').toLowerCase();
+        if (s.includes(ft)) return true;
+      }
+      return false;
+    });
+  }
+  if (!sortKey || !sortDir) return arr;
+  const col = effectiveColumns.find((c) => String(c.key) === sortKey);
+  if (!col) return arr;
+  const dir = sortDir === 'asc' ? 1 : -1;
+  arr.sort((a, b) => {
+    const va = getCellValue(a, col);
+    const vb = getCellValue(b, col);
+    if (va == null && vb == null) return 0;
+    if (va == null) return -1 * dir;
+    if (vb == null) return 1 * dir;
+    if (typeof va === 'number' && typeof vb === 'number') return (va - vb) * dir;
+    const sa = String(va).toLowerCase();
+    const sb = String(vb).toLowerCase();
+    if (sa < sb) return -1 * dir;
+    if (sa > sb) return 1 * dir;
+    return 0;
+  });
+  return arr;
+}
+