syntax = "proto3";

package envoy.type.matcher;

option java_outer_classname = "StringProto";
option java_multiple_files = true;
option java_package = "io.envoyproxy.envoy.type.matcher";
option go_package = "matcher";

import "validate/validate.proto";

// [#protodoc-title: StringMatcher]

// Specifies the way to match a string.
message StringMatcher {
  oneof match_pattern {
    option (validate.required) = true;

    // The input string must match exactly the string specified here.
    //
    // Examples:
    //
    // * *abc* only matches the value *abc*.
    string exact = 1;

    // The input string must have the prefix specified here.
    // Note: empty prefix is not allowed, please use regex instead.
    //
    // Examples:
    //
    // * *abc* matches the value *abc.xyz*
    string prefix = 2 [(validate.rules).string.min_bytes = 1];

    // The input string must have the suffix specified here.
    // Note: empty prefix is not allowed, please use regex instead.
    //
    // Examples:
    //
    // * *abc* matches the value *xyz.abc*
    string suffix = 3 [(validate.rules).string.min_bytes = 1];

    // The input string must match the regular expression specified here.
    // The regex grammar is defined `here
    // <https://en.cppreference.com/w/cpp/regex/ecmascript>`_.
    //
    // Examples:
    //
    // * The regex *\d{3}* matches the value *123*
    // * The regex *\d{3}* does not match the value *1234*
    // * The regex *\d{3}* does not match the value *123.456*
    string regex = 4 [(validate.rules).string.max_bytes = 1024];
  }
}

// Specifies a list of ways to match a string.
message ListStringMatcher {
  repeated StringMatcher patterns = 1;
}