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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"
)
// 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 {
Limit int `json:"limit"`
Offset int `json:"offset"`
}
// ListResponse is a list response.
type ListResponse struct {
Total uint64 `json:"total"`
Limit int `json:"limit"`
Offset int `json:"offset"`
Channels []*blockchain.NodeItem `json:"channels"`
}
// List returns a list of channels.
func (api *ChannelAPI) List(r *http.Request, args *ListArgs, response *ListResponse) error {
channels, err := api.blockchain.GetChannels(args.Limit, args.Offset)
if err != nil {
return fmt.Errorf("failed to get channels list: %w", err)
}
response.Total = api.blockchain.GetChannelsCount()
response.Limit = args.Limit
response.Offset = args.Offset
response.Channels = channels
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 []*blockchain.NodeItem `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([]*blockchain.NodeItem, 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, node)
}
return nil
}
// GetNodeItemArgs is a response.
type GetNodeItemArgs struct {
NodeHash string `json:"node_hash"`
}
// GetNodeItemResponse is a response.
type GetNodeItemResponse struct {
Node *blockchain.NodeItem `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 = item
return nil
}
// FilesFromEntryOrFolderArgs is a request.
type FilesFromEntryOrFolderArgs struct {
NodeHash string `json:"node_hash"`
}
// 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)
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
}