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channel.go
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channel.go
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package rpc
import (
"errors"
"fmt"
"net/http"
"github.com/filefilego/filefilego/blockchain"
"github.com/filefilego/filefilego/common/hexutil"
"github.com/filefilego/filefilego/search"
"github.com/filefilego/filefilego/transaction"
"google.golang.org/protobuf/proto"
)
// ChannelAPI represents the channel rpc service.
type ChannelAPI struct {
blockchain blockchain.Interface
search search.IndexSearcher
}
// NewChannelAPI creates a new channel API to be served using JSONRPC.
func NewChannelAPI(bchain blockchain.Interface, search search.IndexSearcher) (*ChannelAPI, error) {
if bchain == nil {
return nil, errors.New("blockchain is nil")
}
if search == nil {
return nil, errors.New("search is nil")
}
return &ChannelAPI{
blockchain: bchain,
search: search,
}, nil
}
// ListArgs is a list args
type ListArgs struct {
CurrentPage int `json:"current_page"`
PageSize int `json:"page_size"`
Order string `json:"order"`
}
// ListResponse is a list response.
type ListResponse struct {
Total uint64 `json:"total"`
CurrentPage int `json:"current_page"`
PageSize int `json:"page_size"`
Channels []NodeItemJSON `json:"channels"`
}
// List returns a list of channels.
func (api *ChannelAPI) List(r *http.Request, args *ListArgs, response *ListResponse) error {
if args.Order != "asc" && args.Order != "desc" {
return fmt.Errorf("invalid order: %s", args.Order)
}
channels, err := api.blockchain.GetChannels(args.CurrentPage, args.PageSize, args.Order)
if err != nil {
return fmt.Errorf("failed to get channels list: %w", err)
}
response.Total = api.blockchain.GetChannelsCount()
response.CurrentPage = args.CurrentPage
response.PageSize = args.PageSize
response.Channels = make([]NodeItemJSON, len(channels))
for i, v := range channels {
response.Channels[i] = transformNodeItemToJSON(v)
}
return nil
}
// CreateNodeItemsTxDataPayloadArgs is a create channel node item request payload.
type CreateNodeItemsTxDataPayloadArgs struct {
Nodes []NodeItemJSON `json:"nodes"`
}
// CreateNodeItemsTxDataPayloadResponse is a response which contains the transaction data payload for creating the channel node items.
// It contains the required fees for creating the provided node items based on their type.
type CreateNodeItemsTxDataPayloadResponse struct {
TransactionDataPayloadHex string `json:"transaction_data_payload_hex"`
TotalFeesRequired string `json:"total_fees_required"`
}
// CreateNodeItemsTxDataPayload a channel node items that returns the transaction data payload, which in turn can be used in a transaction data payload.
func (api *ChannelAPI) CreateNodeItemsTxDataPayload(r *http.Request, args *CreateNodeItemsTxDataPayloadArgs, response *CreateNodeItemsTxDataPayloadResponse) error {
if len(args.Nodes) == 0 {
return errors.New("empty node items")
}
nodesEnvelope := blockchain.NodeItems{
Nodes: make([]*blockchain.NodeItem, 0),
}
for _, v := range args.Nodes {
item := blockchain.NodeItem{
Name: v.Name,
Enabled: v.Enabled,
NodeType: blockchain.NodeItemType(v.NodeType),
Timestamp: v.Timestamp,
Admins: make([][]byte, 0),
Posters: make([][]byte, 0),
Attributes: make([][]byte, 0),
}
if v.NodeHash != "" {
nodeHash, err := hexutil.Decode(v.NodeHash)
if err != nil {
return fmt.Errorf("failed to decode node hash: %w", err)
}
item.NodeHash = nodeHash
}
if v.ParentHash != "" {
parentHash, err := hexutil.Decode(v.ParentHash)
if err != nil {
return fmt.Errorf("failed to decode parent hash: %w", err)
}
item.ParentHash = parentHash
}
if v.Owner != "" {
owner, err := hexutil.Decode(v.Owner)
if err != nil {
return fmt.Errorf("failed to decode owner: %w", err)
}
item.Owner = owner
}
if v.MerkleRoot != "" {
merkleRoot, err := hexutil.Decode(v.MerkleRoot)
if err != nil {
return fmt.Errorf("failed to decode merkle root hash: %w", err)
}
item.MerkleRoot = merkleRoot
}
if v.FileHash != "" {
fileHash, err := hexutil.Decode(v.FileHash)
if err != nil {
return fmt.Errorf("failed to decode file hash: %w", err)
}
item.FileHash = fileHash
}
if v.ContentType != "" {
item.ContentType = &v.ContentType
}
if v.Description != "" {
item.Description = &v.Description
}
if v.Size != 0 {
item.Size = &v.Size
}
for _, v := range v.Admins {
adm, err := hexutil.Decode(v)
if err != nil {
return fmt.Errorf("failed to decode admin address: %w", err)
}
item.Admins = append(item.Admins, adm)
}
for _, v := range v.Posters {
poster, err := hexutil.Decode(v)
if err != nil {
return fmt.Errorf("failed to decode poster address: %w", err)
}
item.Posters = append(item.Posters, poster)
}
for _, v := range v.Attributes {
item.Attributes = append(item.Attributes, []byte(v))
}
nodesEnvelope.Nodes = append(nodesEnvelope.Nodes, &item)
}
totalFeesRequired := blockchain.CalculateChannelActionsFees(nodesEnvelope.Nodes)
nodeEnvelopeBytes, err := proto.Marshal(&nodesEnvelope)
if err != nil {
return fmt.Errorf("failed to marshal nodes envelope: %w", err)
}
dataPayload := transaction.DataPayload{
Type: transaction.DataType_CREATE_NODE,
Payload: make([]byte, len(nodeEnvelopeBytes)),
}
copy(dataPayload.Payload, nodeEnvelopeBytes)
dataPayloadBytes, err := proto.Marshal(&dataPayload)
if err != nil {
return fmt.Errorf("failed to marshal transaction data payload: %w", err)
}
response.TransactionDataPayloadHex = hexutil.Encode(dataPayloadBytes)
response.TotalFeesRequired = hexutil.EncodeBig(totalFeesRequired)
return nil
}
// SearchArgs is a search args.
type SearchArgs struct {
Query string `json:"query"`
SearchType string `json:"search_type"`
Size int `json:"size"`
CurrentPage int `json:"current_page"`
}
// SearchResponse is a response with the search results.
type SearchResponse struct {
Nodes []NodeItemJSON `json:"nodes"`
}
// Search search in nodes.
func (api *ChannelAPI) Search(r *http.Request, args *SearchArgs, response *SearchResponse) error {
nodeHashes, err := api.search.Search(r.Context(), args.Query, args.Size, args.CurrentPage, search.Type(args.SearchType))
if err != nil {
return fmt.Errorf("failed to perform search: %w", err)
}
response.Nodes = make([]NodeItemJSON, 0)
for _, v := range nodeHashes {
nodeHash, err := hexutil.Decode(v)
if err != nil {
continue
}
node, err := api.blockchain.GetNodeItem(nodeHash)
if err != nil {
continue
}
response.Nodes = append(response.Nodes, transformNodeItemToJSON(node))
}
return nil
}
// GetNodeItemArgs is a response.
type GetNodeItemArgs struct {
NodeHash string `json:"node_hash"`
}
// NodeItemJSON represents a node item json.
type NodeItemJSON struct {
Name string `json:"name"`
NodeHash string `json:"node_hash"`
Owner string `json:"owner"`
Enabled bool `json:"enabled"`
NodeType int32 `json:"node_type"`
Attributes []string `json:"attributes"`
Admins []string `json:"admins"`
Posters []string `json:"posters"`
Timestamp int64 `json:"timestamp"`
Description string `json:"description"`
MerkleRoot string `json:"merkle_root"`
FileHash string `json:"file_hash"`
Size uint64 `json:"size"`
ParentHash string `json:"parent_hash"`
ContentType string `json:"content_type"`
}
// GetNodeItemResponse is a response.
type GetNodeItemResponse struct {
Node NodeItemJSON `json:"node"`
}
// GetNodeItem gets a node item.
func (api *ChannelAPI) GetNodeItem(r *http.Request, args *GetNodeItemArgs, response *GetNodeItemResponse) error {
nodeHashBytes, err := hexutil.Decode(args.NodeHash)
if err != nil {
return fmt.Errorf("failed to decode node hash: %w", err)
}
item, err := api.blockchain.GetNodeItem(nodeHashBytes)
if err != nil {
return fmt.Errorf("failed to find node: %w", err)
}
response.Node = transformNodeItemToJSON(item)
return nil
}
// FilesFromEntryOrFolderArgs is a request.
type FilesFromEntryOrFolderArgs struct {
NodeHash string `json:"node_hash"`
CurrentPage int `json:"current_page"`
PageSize int `json:"page_size"`
}
// FileMetadata represents a file metadata
type FileMetadata struct {
Name string `json:"name"`
Hash string `json:"hash"`
Size uint64 `json:"size"`
Path string `json:"path"`
}
// FilesFromEntryOrFolderResponse is a response.
type FilesFromEntryOrFolderResponse struct {
Files []FileMetadata `json:"files"`
}
// FilesFromEntryOrFolder all the files of a node which is a dir or an entry recursvely.
func (api *ChannelAPI) FilesFromEntryOrFolder(r *http.Request, args *FilesFromEntryOrFolderArgs, response *FilesFromEntryOrFolderResponse) error {
nodeHashBytes, err := hexutil.Decode(args.NodeHash)
if err != nil {
return fmt.Errorf("failed to decode node hash: %w", err)
}
files, err := api.blockchain.GetFilesFromEntryOrFolderRecursively(nodeHashBytes, args.CurrentPage, args.PageSize)
if err != nil {
return fmt.Errorf("failed to find files in the requested node: %w", err)
}
response.Files = make([]FileMetadata, len(files))
for i, v := range files {
response.Files[i] = FileMetadata{
Name: v.Name,
Hash: v.Hash,
Size: v.Size,
Path: v.Path,
}
}
return nil
}
func transformNodeItemToJSON(item *blockchain.NodeItem) NodeItemJSON {
transformed := NodeItemJSON{
Name: item.Name,
NodeHash: hexutil.Encode(item.NodeHash),
Owner: hexutil.Encode(item.Owner),
Enabled: item.Enabled,
NodeType: int32(item.NodeType),
Timestamp: item.Timestamp,
MerkleRoot: hexutil.Encode(item.MerkleRoot),
FileHash: hexutil.EncodeNoPrefix(item.FileHash),
ParentHash: hexutil.Encode(item.ParentHash),
Attributes: make([]string, len(item.Attributes)),
Admins: make([]string, len(item.Admins)),
Posters: make([]string, len(item.Posters)),
}
if item.Description != nil {
transformed.Description = *item.Description
}
if item.Size != nil {
transformed.Size = *item.Size
}
if item.ContentType != nil {
transformed.ContentType = *item.ContentType
}
for i, v := range item.Attributes {
transformed.Attributes[i] = string(v)
}
for i, v := range item.Admins {
transformed.Admins[i] = hexutil.Encode(v)
}
for i, v := range item.Posters {
transformed.Posters[i] = hexutil.Encode(v)
}
return transformed
}