added base changes for the merge cirectory api

webapi/Merge directory.go

@@ -0,0 +1,62 @@
+package webapi
+
+import (
+	"net/http"
+	"strconv"
+)
+
+// SearchResultMergedDirectory contains results for the merged directory.
+type SearchResultMergedDirectory struct {
+	Status    int         `json:"status"`    // Status: 0 = Success with results, 1 = No more results available, 2 = Search ID not found, 3 = No results yet available keep trying
+	Files     [][]apiFile `json:"files"`     // List of files found
+	Statistic interface{} `json:"statistic"` // Statistics of all results (independent from applied filters), if requested. Only set if files are returned (= if statistics changed). See SearchStatisticData.
+}
+
+func (api *WebapiInstance) apiMergeDirectory(w http.ResponseWriter, r *http.Request) {
+	r.ParseForm()
+	offset, _ := strconv.Atoi(r.Form.Get("offset"))
+	limit, err := strconv.Atoi(r.Form.Get("limit"))
+	if err != nil {
+		limit = 100
+	}
+	// ID fields for results for a specific node ID.
+	NodeId, _ := DecodeBlake3Hash(r.Form.Get("node"))
+	hash, _ := DecodeBlake3Hash(r.Form.Get("hash"))
+
+	fileType, err := strconv.Atoi(r.Form.Get("type"))
+	if err != nil {
+		fileType = -1
+	}
+
+	result := api.ExploreFileSharedByNodeThatSharedSimilarFile(fileType, limit, offset, NodeId, hash, true)
+
+	EncodeJSON(api.Backend, w, r, result)
+}
+
+// ExploreFileSharedByNodeThatSharedSimilarFile lists files shared by a nodes which share the same file as a common point
+// Currently this is a greedy search and requires work for optimization
+func (api *WebapiInstance) ExploreFileSharedByNodeThatSharedSimilarFile(fileType int, limit, offset int, nodeID []byte, hash []byte, nodeIDState bool) *SearchResultMergedDirectory {
+	// lookup all NodeID blockchains which have the similar hash
+	// do a search to get all the node IDs sharing the particular file
+	NodeIDs, _ := api.Backend.SearchIndex.SearchNodeIDBasedOnHash(nodeID)
+
+	var result SearchResultMergedDirectory
+
+	for i := range NodeIDs {
+		resultFiles := api.queryRecentShared(api.Backend, fileType, uint64(limit*20/100), uint64(offset), uint64(limit), NodeIDs[i], nodeIDState)
+
+		var ApiFile []apiFile
+
+		// loop over results
+		for n := range resultFiles {
+			ApiFile = append(ApiFile, blockRecordFileToAPI(resultFiles[n]))
+		}
+
+		result.Files = append(result.Files, ApiFile)
+
+	}
+
+	result.Status = 1 // No more results to expect
+
+	return &result
+}