new typeahead

src/components/typeahead.tsx

@@ -0,0 +1,175 @@
+import { useState, useRef, useEffect, ReactNode } from "react";
+import { TextInput, Loader, Paper, Stack, Box, Text } from "@mantine/core";
+import { useDebouncedCallback } from "@mantine/hooks";
+
+export interface TypeaheadOption<T = any> {
+  id: string;
+  data: T;
+}
+
+export interface TypeaheadProps<T> {
+  onSelect: (option: TypeaheadOption<T>) => void;
+  searchFn: (query: string) => Promise<TypeaheadOption<T>[]>;
+  renderOption: (option: TypeaheadOption<T>, isSelected?: boolean) => ReactNode;
+  format?: (option: TypeaheadOption<T>) => string;
+  placeholder?: string;
+  debounceMs?: number;
+  disabled?: boolean;
+  initialValue?: string;
+}
+
+const Typeahead = <T,>({
+  onSelect,
+  searchFn,
+  renderOption,
+  format,
+  placeholder = "Search...",
+  debounceMs = 300,
+  disabled = false,
+  initialValue = ""
+}: TypeaheadProps<T>) => {
+  const [searchQuery, setSearchQuery] = useState(initialValue);
+  const [searchResults, setSearchResults] = useState<TypeaheadOption<T>[]>([]);
+  const [isLoading, setIsLoading] = useState(false);
+  const [isOpen, setIsOpen] = useState(false);
+  const [selectedIndex, setSelectedIndex] = useState(-1);
+  const containerRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const debouncedSearch = useDebouncedCallback(async (query: string) => {
+    if (!query.trim()) {
+      setSearchResults([]);
+      setIsOpen(false);
+      return;
+    }
+
+    setIsLoading(true);
+    try {
+      const results = await searchFn(query);
+      setSearchResults(results);
+      setIsOpen(results.length > 0);
+      setSelectedIndex(-1);
+    } catch (error) {
+      console.error('Search failed:', error);
+      setSearchResults([]);
+      setIsOpen(false);
+    } finally {
+      setIsLoading(false);
+    }
+  }, debounceMs);
+
+  const handleSearchChange = (value: string) => {
+    setSearchQuery(value);
+    debouncedSearch(value);
+  };
+
+  const handleOptionSelect = (option: TypeaheadOption<T>) => {
+    onSelect(option);
+    const displayValue = format ? format(option) : String(option.data);
+    setSearchQuery(displayValue);
+    setIsOpen(false);
+    setSelectedIndex(-1);
+  };
+
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (containerRef.current && !containerRef.current.contains(event.target as Node)) {
+        setIsOpen(false);
+      }
+    };
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (!isOpen || searchResults.length === 0) return;
+
+    switch (e.key) {
+      case 'ArrowDown':
+        e.preventDefault();
+        setSelectedIndex(prev => (prev < searchResults.length - 1 ? prev + 1 : prev));
+        break;
+      case 'ArrowUp':
+        e.preventDefault();
+        setSelectedIndex(prev => (prev > 0 ? prev - 1 : prev));
+        break;
+      case 'Enter':
+        e.preventDefault();
+        if (selectedIndex >= 0 && searchResults[selectedIndex]) {
+          handleOptionSelect(searchResults[selectedIndex]);
+        }
+        break;
+      case 'Escape':
+        setIsOpen(false);
+        setSelectedIndex(-1);
+        break;
+    }
+  };
+
+  return (
+    <Box ref={containerRef} pos="relative" w="100%">
+      <TextInput
+        ref={inputRef}
+        value={searchQuery}
+        onChange={(event) => handleSearchChange(event.currentTarget.value)}
+        onKeyDown={handleKeyDown}
+        onFocus={() => {
+          if (searchResults.length > 0) setIsOpen(true);
+        }}
+        placeholder={placeholder}
+        rightSection={isLoading ? <Loader size="xs" /> : null}
+        disabled={disabled}
+      />
+
+      {isOpen && (
+        <Paper
+          shadow="md"
+          p={0}
+          bd="1px solid var(--mantine-color-dimmed)"
+          style={{
+            position: 'absolute',
+            top: '100%',
+            left: 0,
+            right: 0,
+            zIndex: 9999,
+            maxHeight: '160px',
+            overflowY: 'auto',
+            WebkitOverflowScrolling: 'touch',
+            touchAction: 'pan-y',
+            borderTop: 0,
+            borderTopLeftRadius: 0,
+            borderTopRightRadius: 0
+          }}
+          onTouchMove={(e) => e.stopPropagation()}
+        >
+          {searchResults.length > 0 ? (
+            <Stack gap={0}>
+              {searchResults.map((option, index) => (
+                <Box
+                  key={option.id}
+                  style={{
+                    cursor: 'pointer',
+                    backgroundColor: selectedIndex === index ? 'var(--mantine-color-gray-1)' : 'transparent',
+                  }}
+                  onClick={() => handleOptionSelect(option)}
+                  onMouseEnter={() => setSelectedIndex(index)}
+                >
+                  {renderOption(option, selectedIndex === index)}
+                </Box>
+              ))}
+            </Stack>
+          ) : (
+            <Box p="md">
+              <Text size="sm" c="dimmed" ta="center">
+                {searchQuery.trim() ? 'No results found' : 'Start typing to search...'}
+              </Text>
+            </Box>
+          )}
+        </Paper>
+      )}
+    </Box>
+  );
+};
+
+export default Typeahead;