threshold/internal/server/repository.go

// Copyright IBM Corp. 2020, 2026
// SPDX-License-Identifier: BUSL-1.1

package server

import (
	"context"
	"io"
	"reflect"
	"time"

	"repo.anhonesthost.net/CyberCoveLLC/threshold/internal/db"
	"repo.anhonesthost.net/CyberCoveLLC/threshold/internal/errors"
	"repo.anhonesthost.net/CyberCoveLLC/threshold/internal/kms"
)

const (
	// DefaultLiveness is a default used for various timing parameters, such as
	// grace period for status updates, server liveness, etc.
	DefaultLiveness = 15 * time.Second
)

// Repository is the server database repository
type Repository struct {
	reader db.Reader
	writer db.Writer
	kms    *kms.Kms
	// defaultLimit provides a default for limiting the number of results returned from the repo
	defaultLimit int
	randomReader io.Reader
}

// NewRepository creates a new server Repository. Supports the options: WithLimit
// which sets a default limit on results returned by repo operations.
func NewRepository(ctx context.Context, r db.Reader, w db.Writer, kms *kms.Kms, opt ...Option) (*Repository, error) {
	const op = "server.NewRepository"
	if r == nil {
		return nil, errors.New(ctx, errors.InvalidParameter, op, "nil reader")
	}
	if w == nil {
		return nil, errors.New(ctx, errors.InvalidParameter, op, "nil writer")
	}
	if kms == nil {
		return nil, errors.New(ctx, errors.InvalidParameter, op, "nil kms")
	}

	opts := GetOpts(opt...)
	if opts.withLimit == 0 {
		// zero signals the boundary defaults should be used.
		opts.withLimit = db.DefaultLimit
	}
	return &Repository{
		reader:       r,
		writer:       w,
		kms:          kms,
		defaultLimit: opts.withLimit,
		randomReader: opts.withRandomReader,
	}, nil
}

func isNil(i any) bool {
	if i == nil {
		return true
	}
	switch reflect.TypeOf(i).Kind() {
	case reflect.Ptr, reflect.Map, reflect.Array, reflect.Chan, reflect.Slice:
		return reflect.ValueOf(i).IsNil()
	}
	return false
}