package diff

import "strings"

/*

normalizeTemplatedPath converts a path to its normalized form, without parameter names

For example:

/person/{personName} -> /person/{}

Return values:

1. The normalized path

2. Number of params

3. List of param names

This implementation is based on Paths.normalizeTemplatedPath in openapi3

*/

func normalizeTemplatedPath(path string) (string, uint, []string) {

if strings.IndexByte(path, '{') < 0 {

return path, 0, nil

}

var buffTpl strings.Builder

buffTpl.Grow(len(path))

var (

cc rune

count uint

isVariable bool

vars = []string{}

buffVar strings.Builder

)

for i, c := range path {

if isVariable {

if c == '}' {

// End path variable

isVariable = false

vars = append(vars, buffVar.String())

buffVar = strings.Builder{}

// First append possible '*' before this character

// The character '}' will be appended

if i > 0 && cc == '*' {

buffTpl.WriteRune(cc)

}

} else {

buffVar.WriteRune(c)

continue

}

} else if c == '{' {

// Begin path variable

isVariable = true

// The character '{' will be appended

count++

}

// Append the character

buffTpl.WriteRune(c)

cc = c

}

return buffTpl.String(), count, vars

}