mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-28 17:05:39 +00:00
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
// MIT License
|
|
//
|
|
// Copyright (c) 2019 GraphQL Contributors
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
//
|
|
// This implementation has been adapted from the graphql-js reference implementation
|
|
// https://github.com/graphql/graphql-js/blob/5eb7c4ded7ceb83ac742149cbe0dae07a8af9a30/src/language/blockString.js
|
|
// which is released under the MIT License above.
|
|
|
|
package common
|
|
|
|
import (
|
|
"strings"
|
|
)
|
|
|
|
// Produces the value of a block string from its parsed raw value, similar to
|
|
// CoffeeScript's block string, Python's docstring trim or Ruby's strip_heredoc.
|
|
//
|
|
// This implements the GraphQL spec's BlockStringValue() static algorithm.
|
|
func blockString(raw string) string {
|
|
lines := strings.Split(raw, "\n")
|
|
|
|
// Remove common indentation from all lines except the first (which has none)
|
|
ind := blockStringIndentation(lines)
|
|
if ind > 0 {
|
|
for i := 1; i < len(lines); i++ {
|
|
l := lines[i]
|
|
if len(l) < ind {
|
|
lines[i] = ""
|
|
continue
|
|
}
|
|
lines[i] = l[ind:]
|
|
}
|
|
}
|
|
|
|
// Remove leading and trailing blank lines
|
|
trimStart := 0
|
|
for i := 0; i < len(lines) && isBlank(lines[i]); i++ {
|
|
trimStart++
|
|
}
|
|
lines = lines[trimStart:]
|
|
trimEnd := 0
|
|
for i := len(lines) - 1; i > 0 && isBlank(lines[i]); i-- {
|
|
trimEnd++
|
|
}
|
|
lines = lines[:len(lines)-trimEnd]
|
|
|
|
return strings.Join(lines, "\n")
|
|
}
|
|
|
|
func blockStringIndentation(lines []string) int {
|
|
var commonIndent *int
|
|
for i := 1; i < len(lines); i++ {
|
|
l := lines[i]
|
|
indent := leadingWhitespace(l)
|
|
if indent == len(l) {
|
|
// don't consider blank/empty lines
|
|
continue
|
|
}
|
|
if indent == 0 {
|
|
return 0
|
|
}
|
|
if commonIndent == nil || indent < *commonIndent {
|
|
commonIndent = &indent
|
|
}
|
|
}
|
|
if commonIndent == nil {
|
|
return 0
|
|
}
|
|
return *commonIndent
|
|
}
|
|
|
|
func isBlank(s string) bool {
|
|
return len(s) == 0 || leadingWhitespace(s) == len(s)
|
|
}
|
|
|
|
func leadingWhitespace(s string) int {
|
|
i := 0
|
|
for _, r := range s {
|
|
if r != '\t' && r != ' ' {
|
|
break
|
|
}
|
|
i++
|
|
}
|
|
return i
|
|
}
|