go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/milo/ui/src/common/queries/utils.ts (about)

     1  // Copyright 2022 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  const KV_RE = /([^=]*)(?:=(.*))?$/;
    16  
    17  export const KV_SYNTAX_EXPLANATION =
    18    "case sensitive, both key & value should be URL query encoded if they contain '%', ' ', '+'";
    19  
    20  /**
    21   * Parses a string like `${encodedKey}=${encodedValue}` and return the key and
    22   * the value. Both key and value in the string are assumed to be query param
    23   * encoded.
    24   *
    25   * If there's no value, (e.g. `${encodedKey}`), return null for the value.
    26   */
    27  export function parseKeyValue(source: string): [string, string | null] {
    28    const [, key, value] = source.match(KV_RE)!;
    29    return [
    30      decodeQueryParam(key),
    31      value === undefined ? null : decodeQueryParam(value),
    32    ];
    33  }
    34  
    35  function decodeQueryParam(p: string) {
    36    return decodeURIComponent(p.replace(/\+/g, ' '));
    37  }