Add paging to explorer

api/worker.go

@@ -182,7 +182,9 @@ func (w *Worker) GetTransaction(txid string, bestheight uint32, spendingTxs bool
 		Vin:           vins,
 		Vout:          vouts,
 	}
-	glog.Info("GetTransaction ", txid, " finished in ", time.Since(start))
+	if spendingTxs {
+		glog.Info("GetTransaction ", txid, " finished in ", time.Since(start))
+	}
 	return r, nil
 }
 
@@ -297,6 +299,7 @@ func (w *Worker) txFromTxAddress(txid string, ta *db.TxAddresses, bi *db.BlockIn
 // GetAddress computes address value and gets transactions for given address
 func (w *Worker) GetAddress(address string, page int, txsOnPage int, onlyTxids bool) (*Address, error) {
 	start := time.Now()
+	page--
 	if page < 0 {
 		page = 0
 	}
@@ -340,7 +343,10 @@ func (w *Worker) GetAddress(address string, page int, txsOnPage int, onlyTxids b
 	}
 	// paging
 	from := page * txsOnPage
-	totalPages := len(txc) / txsOnPage
+	totalPages := (len(txc) - 1) / txsOnPage
+	if totalPages < 0 {
+		totalPages = 0
+	}
 	if from >= len(txc) {
 		page = totalPages - 1
 		if page < 0 {
@@ -370,7 +376,7 @@ func (w *Worker) GetAddress(address string, page int, txsOnPage int, onlyTxids b
 		} else {
 			uBalSat.Add(&uBalSat, tx.getAddrVoutValue(addrDesc))
 			uBalSat.Sub(&uBalSat, tx.getAddrVinValue(addrDesc))
-			if page > 0 {
+			if page == 0 {
 				if onlyTxids {
 					txids[txi] = tx.Txid
 				} else {
@@ -408,7 +414,9 @@ func (w *Worker) GetAddress(address string, page int, txsOnPage int, onlyTxids b
 		}
 		txi++
 	}
-	if !onlyTxids {
+	if onlyTxids {
+		txids = txids[:txi]
+	} else {
 		txs = txs[:txi]
 	}
 	r := &Address{
@@ -421,8 +429,8 @@ func (w *Worker) GetAddress(address string, page int, txsOnPage int, onlyTxids b
 		UnconfirmedTxApperances: len(txm),
 		Transactions:            txs,
 		Txids:                   txids,
-		Page:                    page,
-		TotalPages:              totalPages,
+		Page:                    page + 1,
+		TotalPages:              totalPages + 1,
 		TxsOnPage:               txsOnPage,
 	}
 	glog.Info("GetAddress ", address, " finished in ", time.Since(start))

server/public.go

@@ -20,7 +20,7 @@ import (
 )
 
 const blockbookAbout = "Blockbook - blockchain indexer for TREZOR wallet https://trezor.io/. Do not use for any other purpose."
-const txsOnPage = 30
+const txsOnPage = 25
 const txsInAPI = 1000
 
 // PublicServer is a handle to public http server
@@ -272,6 +272,8 @@ const (
 	errorTpl = tpl(iota)
 	txTpl
 	addressTpl
+
+	tplCount
 )
 
 type TemplateData struct {
@@ -281,6 +283,10 @@ type TemplateData struct {
 	AddrStr      string
 	Tx           *api.Tx
 	Error        *api.ApiError
+	Page         int
+	PrevPage     int
+	NextPage     int
+	PagingRange  []int
 }
 
 func parseTemplates() []*template.Template {
@@ -290,10 +296,10 @@ func parseTemplates() []*template.Template {
 		"setTxToTemplateData": setTxToTemplateData,
 		"stringInSlice":       stringInSlice,
 	}
-	t := make([]*template.Template, 3)
-	t[errorTpl] = template.Must(template.New("tx").Funcs(templateFuncMap).ParseFiles("./static/templates/error.html", "./static/templates/base.html"))
+	t := make([]*template.Template, tplCount)
+	t[errorTpl] = template.Must(template.New("error").Funcs(templateFuncMap).ParseFiles("./static/templates/error.html", "./static/templates/base.html"))
 	t[txTpl] = template.Must(template.New("tx").Funcs(templateFuncMap).ParseFiles("./static/templates/tx.html", "./static/templates/txdetail.html", "./static/templates/base.html"))
-	t[addressTpl] = template.Must(template.New("address").Funcs(templateFuncMap).ParseFiles("./static/templates/address.html", "./static/templates/txdetail.html", "./static/templates/base.html"))
+	t[addressTpl] = template.Must(template.New("address").Funcs(templateFuncMap).ParseFiles("./static/templates/address.html", "./static/templates/txdetail.html", "./static/templates/paging.html", "./static/templates/base.html"))
 	return t
 }
 
@@ -346,9 +352,65 @@ func (s *PublicServer) explorerAddress(r *http.Request) (tpl, *TemplateData, err
 	data := s.newTemplateData()
 	data.AddrStr = address.AddrStr
 	data.Address = address
+	data.Page = address.Page
+	data.PagingRange, data.PrevPage, data.NextPage = getPagingRange(address.Page, address.TotalPages)
 	return addressTpl, data, nil
 }
 
+func getPagingRange(page int, total int) ([]int, int, int) {
+	if total < 2 {
+		return nil, 0, 0
+	}
+	pp, np := page-1, page+1
+	if np > total {
+		np = total
+	}
+	if pp < 1 {
+		pp = 1
+	}
+	r := make([]int, 0, 8)
+	if total < 6 {
+		for i := 1; i <= total; i++ {
+			r = append(r, i)
+		}
+	} else {
+		r = append(r, 1)
+		if page > 3 {
+			r = append(r, 0)
+		}
+		if pp == 1 {
+			if page == 1 {
+				r = append(r, np)
+				r = append(r, np+1)
+				r = append(r, np+2)
+			} else {
+				r = append(r, page)
+				r = append(r, np)
+				r = append(r, np+1)
+			}
+		} else if np == total {
+			if page == total {
+				r = append(r, pp-2)
+				r = append(r, pp-1)
+				r = append(r, pp)
+			} else {
+				r = append(r, pp-1)
+				r = append(r, pp)
+				r = append(r, page)
+			}
+		} else {
+			r = append(r, pp)
+			r = append(r, page)
+			r = append(r, np)
+		}
+		if page <= total-3 {
+			r = append(r, 0)
+		}
+		r = append(r, total)
+	}
+	return r, pp, np
+}
+
 type resAboutBlockbookPublic struct {
 	Coin            string    `json:"coin"`
 	Host            string    `json:"host"`

static/css/main.css

@@ -192,4 +192,38 @@ h3 {
 .navbar-nav .nav-link {
     padding-right: 0;
     padding-left: .25rem;
+}
+
+.h-container {
+    display: -webkit-box;
+    display: -ms-flexbox;
+    -ms-flex-wrap: wrap;
+    flex-wrap: wrap;
+}
+
+.h-container-6 {
+    width: 50%;
+    margin: 0;
+}
+
+.h-container ul {
+    margin: 0;
+}
+
+.page-link {
+    color: #428bca;
+}
+
+.page-text {
+    display: block;
+    padding: .5rem .3rem;
+    line-height: 1.25;
+}
+
+.page-link {
+    color: #428bca;
+}
+
+.page-item.active .page-link {
+    background-color: #428bca;
 }

static/templates/address.html

@@ -28,7 +28,7 @@
         </tbody>
     </table>
 </div>
-{{if $addr.UnconfirmedTxApperances}}
+{{- if $addr.UnconfirmedTxApperances -}}
 <h3>Unconfirmed</h3>
 <div class="data-div">
     <table class="table data-table">
@@ -44,9 +44,13 @@
         </tbody>
     </table>
 </div>
-{{end}} {{if $addr.Transactions}}
-<h3>Transactions</h3>
-<div class="data-div">
-    {{range $tx := $addr.Transactions}}{{$data := setTxToTemplateData $data $tx}}{{template "txdetail" $data }}{{end}}
+{{- end}}{{if $addr.Transactions -}}
+<div class="h-container">
+    <h3 class="h-container-6">Transactions</h3>
+    <nav class="h-container-6">{{template "paging" $data}}</nav>
 </div>
-{{end}} {{end}}
+<div class="data-div">
+    {{- range $tx := $addr.Transactions}}{{$data := setTxToTemplateData $data $tx}}{{template "txdetail" $data}}{{end -}}
+</div>
+<nav>{{template "paging" $data }}</nav>
+{{end}}{{end}}

static/templates/paging.html

@@ -0,0 +1,11 @@
+{{- define "paging"}}{{$data := . -}}{{if $data.PagingRange -}}
+<ul class="pagination justify-content-end">
+    <li class="page-item"><a class="page-link" href="?page={{$data.PrevPage}}">&lt;</a></li>
+    {{- range $p := $data.PagingRange -}}
+    <li class="page-item{{if eq $data.Page $p}} active{{end}}">
+        {{- if $p}}<a class="page-link" href="?page={{$p}}">{{$p}}</a>
+        {{- else -}}<span class="page-text">...</span>{{- end -}}
+    </li>{{- end -}}
+    <li class="page-item"><a class="page-link" href="?page={{$data.NextPage}}">&gt;</a></li>
+</ul>
+{{- end -}}{{- end -}}