1 files changed, 189 insertions, 0 deletions
diff --git a/webui/src/list/Filter.tsx b/webui/src/list/Filter.tsx
new file mode 100644
index 00000000..30b52de8
--- /dev/null
+++ b/webui/src/list/Filter.tsx
@@ -0,0 +1,189 @@
+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';
+import clsx from 'clsx';
+import { LocationDescriptor } from 'history';
+import React, { useState, useRef } from 'react';
+import { Link } from 'react-router-dom';
+
+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;
+  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 };