add pagination

Former-commit-id: 8ca367e69d32d36e90c101e2c59bd1609b9b7ac0 [formerly 8ca367e69d32d36e90c101e2c59bd1609b9b7ac0 [formerly c072643cade74f2f07698daffd7009579eade69d [formerly 7b8c08e0cf]]]
Former-commit-id: f924ab003eb325c4c754a3aac97eff81836fbb67
Former-commit-id: b8c5df995b0ec7f95b3457264433ea65567cc6f3 [formerly 6f120209f2a5531b584a246f3eb9aa4d23532866]
Former-commit-id: 9a63835ebcc7cbaa7e5a8896700d2c74d652b6d2

README.md

@@ -38,6 +38,8 @@ List of shortcuts:
 |----|------|
 |`<up>`|navigate up|
 |`<down>`|navigate down|
+|`<right>`|next page|
+|`<left>`|previous page|
 |`<ctrl-u>`|page up|
 |`<ctrl-d>`|page down|
 |`<enter>`|visit highlighted coin on CoinMarketCap|

bin/cointop32.REMOVED.git-id

@@ -1 +1 @@
-8581fe52805451f3f959248757480db12e4a3b0d
+ed65aa79a4f28f144b4b21c2481224f0466a5181

bin/cointop64.REMOVED.git-id

@@ -1 +1 @@
-5a10db031042fc4de090c186e9870f60510e4d68
+7410bf82087f7933ba1f4b27e49187dca72d6436

cointop/cointop.go

@@ -34,8 +34,11 @@ type Cointop struct {
 	sortdesc      bool
 	sortby        string
 	api           api.Interface
+	allcoins      []*apitypes.Coin
 	coins         []*apitypes.Coin
-	coinsmap      map[string]apitypes.Coin
+	allcoinsmap   map[string]apitypes.Coin
+	page          int
+	perpage       int
 	refreshmux    sync.Mutex
 	refreshticker *time.Ticker
 }
@@ -54,6 +57,10 @@ func Run() {
 		g:             g,
 		api:           api.NewCMC(),
 		refreshticker: time.NewTicker(1 * time.Minute),
+		sortby:        "rank",
+		sortdesc:      false,
+		page:          0,
+		perpage:       100,
 	}
 	g.SetManagerFunc(ct.layout)
 	if err := ct.keybindings(g); err != nil {

cointop/keybindings.go

@@ -21,6 +21,8 @@ func (ct *Cointop) setKeybinding(key interface{}, callback func(g *gocui.Gui, v
 }
 
 func (ct *Cointop) keybindings(g *gocui.Gui) error {
+	ct.setKeybinding(gocui.KeyArrowRight, ct.nextPage)
+	ct.setKeybinding(gocui.KeyArrowLeft, ct.prevPage)
 	ct.setKeybinding(gocui.KeyArrowDown, ct.cursorDown)
 	ct.setKeybinding('j', ct.cursorDown)
 	ct.setKeybinding(gocui.KeyArrowUp, ct.cursorUp)

cointop/layout.go

@@ -1,6 +1,8 @@
 package cointop
 
 import (
+	"math"
+
 	"github.com/jroimartin/gocui"
 	apitypes "github.com/miguelmota/cointop/pkg/api/types"
 	"github.com/miguelmota/cointop/pkg/pad"
@@ -75,8 +77,8 @@ func (ct *Cointop) layout(g *gocui.Gui) error {
 		ct.tableview.Highlight = true
 		ct.tableview.SelBgColor = gocui.ColorCyan
 		ct.tableview.SelFgColor = gocui.ColorBlack
+		ct.updateCoins()
 		ct.updateTable()
-		ct.sort("rank", false)
 		ct.rowChanged()
 	}
 
@@ -95,21 +97,67 @@ func (ct *Cointop) layout(g *gocui.Gui) error {
 	return nil
 }
 
-func (ct *Cointop) updateTable() error {
+func (ct *Cointop) updateCoins() error {
 	list := []*apitypes.Coin{}
-	coinsmap, err := ct.api.GetAllCoinData()
+	allcoinsmap, err := ct.api.GetAllCoinData()
 	if err != nil {
 		return err
 	}
 
-	ct.coinsmap = coinsmap
-	for i := range ct.coinsmap {
-		coin := ct.coinsmap[i]
-		list = append(list, &coin)
+	ct.allcoinsmap = allcoinsmap
+	if len(ct.allcoins) == 0 {
+		for i := range ct.allcoinsmap {
+			coin := ct.allcoinsmap[i]
+			list = append(list, &coin)
+		}
+		ct.allcoins = list
+		ct.sort(ct.sortby, ct.sortdesc, ct.allcoins)
+	} else {
+		// update list in place without changing order
+		for i := range ct.allcoinsmap {
+			cm := ct.allcoinsmap[i]
+			for k := range ct.allcoins {
+				c := ct.allcoins[k]
+				if c.ID == cm.ID {
+					/*
+						if c.ID == "ethereum" {
+							// test
+							cm.PriceUSD = float64(time.Now().Unix())
+						}
+					*/
+					c.ID = cm.ID
+					c.Name = cm.Name
+					c.Symbol = cm.Symbol
+					c.Rank = cm.Rank
+					c.PriceUSD = cm.PriceUSD
+					c.PriceBTC = cm.PriceBTC
+					c.USD24HVolume = cm.USD24HVolume
+					c.MarketCapUSD = cm.MarketCapUSD
+					c.AvailableSupply = cm.AvailableSupply
+					c.TotalSupply = cm.TotalSupply
+					c.PercentChange1H = cm.PercentChange1H
+					c.PercentChange24H = cm.PercentChange24H
+					c.PercentChange7D = cm.PercentChange7D
+					c.LastUpdated = cm.LastUpdated
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func (ct *Cointop) updateTable() error {
+	start := ct.page * ct.perpage
+	end := start + ct.perpage
+	if end >= len(ct.allcoins)-1 {
+		start = int(math.Floor(float64(start/100)) * 100)
+
+		end = len(ct.allcoins) - 1
 	}
 
-	ct.coins = list
-	ct.sort(ct.sortby, ct.sortdesc)
+	sliced := ct.allcoins[start:end]
+	ct.coins = sliced
+	ct.sort(ct.sortby, ct.sortdesc, ct.coins)
 	ct.refreshTable()
 	return nil
 }
@@ -120,6 +168,7 @@ func (ct *Cointop) intervalFetchData() {
 			select {
 			case <-ct.refreshticker.C:
 				ct.refreshmux.Lock()
+				ct.updateCoins()
 				ct.updateTable()
 				ct.updateMarket()
 				ct.updateChart()

cointop/navigation.go

@@ -50,7 +50,7 @@ func (ct *Cointop) pageDown(g *gocui.Gui, v *gocui.View) error {
 	numRows := len(ct.coins) - 1
 	_, sy := ct.tableview.Size()
 	rows := sy
-	if (cy + y + rows) > numRows {
+	if (cy + +y + rows) > numRows {
 		// go to last row
 		ct.tableview.SetCursor(cx, numRows)
 		ox, _ := ct.tableview.Origin()
@@ -88,3 +88,19 @@ func (ct *Cointop) pageUp(g *gocui.Gui, v *gocui.View) error {
 	ct.rowChanged()
 	return nil
 }
+
+func (ct *Cointop) prevPage(g *gocui.Gui, v *gocui.View) error {
+	if (ct.page - 1) >= 0 {
+		ct.page = ct.page - 1
+	}
+	ct.updateTable()
+	return nil
+}
+
+func (ct *Cointop) nextPage(g *gocui.Gui, v *gocui.View) error {
+	if ((ct.page + 1) * ct.perpage) <= len(ct.allcoins) {
+		ct.page = ct.page + 1
+	}
+	ct.updateTable()
+	return nil
+}

cointop/sort.go

@@ -3,17 +3,18 @@ package cointop
 import (
 	"github.com/bradfitz/slice"
 	"github.com/jroimartin/gocui"
+	apitypes "github.com/miguelmota/cointop/pkg/api/types"
 )
 
-func (ct *Cointop) sort(sortby string, desc bool) {
+func (ct *Cointop) sort(sortby string, desc bool, list []*apitypes.Coin) {
 	ct.sortby = sortby
 	ct.sortdesc = desc
-	slice.Sort(ct.coins[:], func(i, j int) bool {
+	slice.Sort(list[:], func(i, j int) bool {
 		if ct.sortdesc {
 			i, j = j, i
 		}
-		a := ct.coins[i]
-		b := ct.coins[j]
+		a := list[i]
+		b := list[j]
 		switch sortby {
 		case "rank":
 			return a.Rank < b.Rank
@@ -51,7 +52,7 @@ func (ct *Cointop) sortfn(sortby string, desc bool) func(g *gocui.Gui, v *gocui.
 			desc = !desc
 		}
 
-		ct.sort(sortby, desc)
+		ct.sort(sortby, desc, ct.coins)
 		ct.g.Update(func(g *gocui.Gui) error {
 			ct.tableview.Clear()
 			ct.updateTable()

cointop/status.go

@@ -10,7 +10,7 @@ import (
 func (ct *Cointop) updateStatus(s string) {
 	maxX, _ := ct.g.Size()
 	ct.statusview.Clear()
-	fmt.Fprintln(ct.statusview, pad.Right(fmt.Sprintf("[q]uit %s", s), maxX, " "))
+	fmt.Fprintln(ct.statusview, pad.Right(fmt.Sprintf("[q]uit [← →]page %s", s), maxX, " "))
 }
 
 func (ct *Cointop) showLink() {

cointop/table.go

@@ -89,11 +89,19 @@ func (ct *Cointop) refreshTable() error {
 func (ct *Cointop) selectedRowIndex() int {
 	_, y := ct.tableview.Origin()
 	_, cy := ct.tableview.Cursor()
-	return y + cy
+	idx := y + cy
+	if idx < 0 {
+		idx = 0
+	}
+	if idx >= len(ct.coins) {
+		idx = len(ct.coins) - 1
+	}
+	return idx
 }
 
 func (ct *Cointop) selectedCoin() *apitypes.Coin {
-	return ct.coins[ct.selectedRowIndex()]
+	idx := ct.selectedRowIndex()
+	return ct.coins[idx]
 }
 
 func (ct *Cointop) rowLink() string {