syntax = "proto3";

package validate_structural;

import "buf/validate/validate.proto";

message StructuralRules {
  optional string required_value = 1 [(buf.validate.field).required = true];

  string ignored_always = 2 [(buf.validate.field).ignore = IGNORE_ALWAYS];

  string ignored_zero = 3 [(buf.validate.field).ignore = IGNORE_IF_ZERO_VALUE];

  optional string ignored_required = 6 [
    (buf.validate.field).required = true,
    (buf.validate.field).ignore = IGNORE_ALWAYS
  ];

  string ignored_zero_cel = 7 [
    (buf.validate.field).ignore = IGNORE_IF_ZERO_VALUE,
    (buf.validate.field).cel = {
      id: "ignored_zero_cel"
      message: "must be non-empty"
      expression: "this.size() > 0"
    }
  ];

  oneof choice {
    option (buf.validate.oneof).required = true;

    string name = 4;
    int32 id = 5;
  }
}

message MessageOneofRules {
  option (buf.validate.message).oneof = {
    fields: ["left", "right"]
    required: true
  };

  string left = 1;
  string right = 2 [(buf.validate.field).cel = {
    id: "right_non_empty"
    message: "right must be non-empty"
    expression: "this.size() > 0"
  }];
}