whois.go

package keeper

import (
	"encoding/binary"
	"errors"
	"strings"

	"github.com/cosmos/cosmos-sdk/store/prefix"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/gitopia/gitopia/v3/x/gitopia/types"
)

type WhoisAddress struct {
	Address   string
	OwnerType types.OwnerType
}

// GetWhoisCount get the total number of whois
func (k Keeper) GetWhoisCount(ctx sdk.Context) uint64 {
	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisCountKey))
	byteKey := types.KeyPrefix(types.WhoisCountKey)
	bz := store.Get(byteKey)

	// Count doesn't exist: no element
	if bz == nil {
		return 0
	}

	// Parse bytes
	return binary.BigEndian.Uint64(bz)
}

// SetWhoisCount set the total number of whois
func (k Keeper) SetWhoisCount(ctx sdk.Context, count uint64) {
	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisCountKey))
	byteKey := types.KeyPrefix(types.WhoisCountKey)
	bz := make([]byte, 8)
	binary.BigEndian.PutUint64(bz, count)
	store.Set(byteKey, bz)
}

// AppendWhois appends a whois in the store with a new id and update the count
func (k Keeper) AppendWhois(
	ctx sdk.Context,
	whois types.Whois,
) uint64 {
	// Create the whois
	count := k.GetWhoisCount(ctx)

	// Set the ID of the appended value
	whois.Id = count

	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisKey))
	appendedValue := k.cdc.MustMarshal(&whois)
	store.Set([]byte(whois.Name), appendedValue)

	// Update whois count
	k.SetWhoisCount(ctx, count+1)

	return count
}

// SetWhois set a specific whois in the store
func (k Keeper) SetWhois(ctx sdk.Context, whois types.Whois) {
	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisKey))
	b := k.cdc.MustMarshal(&whois)
	store.Set([]byte(whois.Name), b)
}

// GetWhois returns the whois information
func (k Keeper) GetWhois(ctx sdk.Context, username string) (val types.Whois, found bool) {
	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisKey))
	b := store.Get([]byte(username))
	if b == nil {
		return val, false
	}
	k.cdc.MustUnmarshal(b, &val)
	return val, true
}

// RemoveWhois removes a whois from the store
func (k Keeper) RemoveWhois(ctx sdk.Context, username string) {
	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisKey))
	store.Delete([]byte(username))
}

// GetAllWhois returns all whois
func (k Keeper) GetAllWhois(ctx sdk.Context) (list []types.Whois) {
	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.WhoisKey))
	iterator := sdk.KVStorePrefixIterator(store, []byte{})

	defer iterator.Close()

	for ; iterator.Valid(); iterator.Next() {
		var val types.Whois
		k.cdc.MustUnmarshal(iterator.Value(), &val)
		list = append(list, val)
	}

	return
}

// GetWhoisIDBytes returns the byte representation of the ID
func GetWhoisIDBytes(id uint64) []byte {
	bz := make([]byte, 8)
	binary.BigEndian.PutUint64(bz, id)
	return bz
}

// GetWhoisIDFromBytes returns ID in uint64 format from a byte array
func GetWhoisIDFromBytes(bz []byte) uint64 {
	return binary.BigEndian.Uint64(bz)
}

// Checks if username or address is valid and exists. Also identify its type (USER/DAO).
func (k Keeper) ResolveAddress(ctx sdk.Context, id string) (address *WhoisAddress, err error) {
	if _, err := sdk.AccAddressFromBech32(id); err != nil {
		whois, found := k.GetWhois(ctx, strings.ToLower(id))
		if !found {
			return nil, errors.New("username or address not exists")
		}
		return &WhoisAddress{Address: whois.Address, OwnerType: whois.OwnerType}, nil
	}

	if _, found := k.GetUser(ctx, id); found {
		return &WhoisAddress{Address: id, OwnerType: types.OwnerType_USER}, nil
	}

	if _, found := k.GetDao(ctx, id); found {
		return &WhoisAddress{Address: id, OwnerType: types.OwnerType_DAO}, nil
	}

	return nil, errors.New("username or address not exists")
}