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import clsx from 'clsx';
import { LocationDescriptor } from 'history';
import React, { useState, useRef } from 'react';
import { Link } from 'react-router-dom';
import Menu from '@material-ui/core/Menu';
import MenuItem from '@material-ui/core/MenuItem';
import { SvgIconProps } from '@material-ui/core/SvgIcon';
import { makeStyles } from '@material-ui/core/styles';
import ArrowDropDown from '@material-ui/icons/ArrowDropDown';
export type Query = { [key: string]: Array<string> };
function parse(query: string): Query {
// TODO: extract the rest of the query?
const params: Query = {};
// TODO: support escaping without quotes
const re = /(\w+):([A-Za-z0-9-]+|(["'])(([^\3]|\\.)*)\3)+/g;
let matches;
while ((matches = re.exec(query)) !== null) {
if (!params[matches[1]]) {
params[matches[1]] = [];
}
let value;
if (matches[4]) {
value = matches[4];
} else {
value = matches[2];
}
value = value.replace(/\\(.)/g, '$1');
params[matches[1]].push(value);
}
return params;
}
function quote(value: string): string {
const hasSingle = value.includes("'");
const hasDouble = value.includes('"');
const hasSpaces = value.includes(' ');
if (!hasSingle && !hasDouble && !hasSpaces) {
return value;
}
if (!hasDouble) {
return `"${value}"`;
}
if (!hasSingle) {
return `'${value}'`;
}
value = value.replace(/"/g, '\\"');
return `"${value}"`;
}
function stringify(params: Query): string {
const parts: string[][] = Object.entries(params).map(([key, values]) => {
return values.map(value => `${key}:${quote(value)}`);
});
return new Array<string>().concat(...parts).join(' ');
}
const useStyles = makeStyles(theme => ({
element: {
...theme.typography.body2,
color: '#444',
padding: theme.spacing(0, 1),
fontWeight: 400,
textDecoration: 'none',
display: 'flex',
background: 'none',
border: 'none',
},
itemActive: {
fontWeight: 600,
color: '#333',
},
icon: {
paddingRight: theme.spacing(0.5),
},
}));
type DropdownTuple = [string, string];
type FilterDropdownProps = {
children: React.ReactNode;
dropdown: DropdownTuple[];
itemActive: (key: string) => boolean;
icon?: React.ComponentType<SvgIconProps>;
to: (key: string) => LocationDescriptor;
} & React.ButtonHTMLAttributes<HTMLButtonElement>;
function FilterDropdown({
children,
dropdown,
itemActive,
icon: Icon,
to,
...props
}: FilterDropdownProps) {
const [open, setOpen] = useState(false);
const buttonRef = useRef<HTMLButtonElement>(null);
const classes = useStyles({ active: false });
const content = (
<>
{Icon && <Icon fontSize="small" classes={{ root: classes.icon }} />}
<div>{children}</div>
</>
);
return (
<>
<button
ref={buttonRef}
onClick={() => setOpen(!open)}
className={classes.element}
{...props}
>
{content}
<ArrowDropDown fontSize="small" />
</button>
<Menu
getContentAnchorEl={null}
anchorOrigin={{
vertical: 'bottom',
horizontal: 'left',
}}
transformOrigin={{
vertical: 'top',
horizontal: 'left',
}}
open={open}
onClose={() => setOpen(false)}
anchorEl={buttonRef.current}
>
{dropdown.map(([key, value]) => (
<MenuItem
component={Link}
to={to(key)}
className={itemActive(key) ? classes.itemActive : undefined}
onClick={() => setOpen(false)}
key={key}
>
{value}
</MenuItem>
))}
</Menu>
</>
);
}
export type FilterProps = {
active: boolean;
to: LocationDescriptor; // the target on click
icon?: React.ComponentType<SvgIconProps>;
children: React.ReactNode;
};
function Filter({ active, to, children, icon: Icon }: FilterProps) {
const classes = useStyles();
const content = (
<>
{Icon && <Icon fontSize="small" classes={{ root: classes.icon }} />}
<div>{children}</div>
</>
);
if (to) {
return (
<Link
to={to}
className={clsx(classes.element, active && classes.itemActive)}
>
{content}
</Link>
);
}
return (
<div className={clsx(classes.element, active && classes.itemActive)}>
{content}
</div>
);
}
export default Filter;
export { parse, stringify, quote, FilterDropdown, Filter };
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