hard cache

Former-commit-id: cedd3a565c7f8a499500bc9445fa44a70cb1a895 [formerly cedd3a565c7f8a499500bc9445fa44a70cb1a895 [formerly e24f0272bac7c798381be585a83d40817c1648f6 [formerly 878ef53221b0b8614fc850546e78fa1ff7295979]]]
Former-commit-id: 7f8ee8eec60d4fb0ebb73769c3d097fc39ccc2ec
Former-commit-id: 250b98302b7454528741417201b3ecf389647016 [formerly 9b8aa21f0900d9549c217d78c6c25cf4c9374b6f]
Former-commit-id: adfebc801b86ee03021eab460df6fa73915f666b

Gopkg.lock

@@ -61,6 +61,12 @@
   packages = ["."]
   revision = "3e24a7b6661e09b87a9f49d693034219f81602fa"
 
+[[projects]]
+  name = "github.com/patrickmn/go-cache"
+  packages = ["."]
+  revision = "a3647f8e31d79543b2d0f0ae2fe5c379d72cedc0"
+  version = "v2.1.0"
+
 [[projects]]
   branch = "master"
   name = "go4.org"
@@ -85,6 +91,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "8949d0a22e4e0c000e6c21a69eac0b147496e2b65320a4f5a63f966d54524473"
+  inputs-digest = "a379741758ab87277a2159f17b7f9741ece58d2f94b1c959191189f9100a6f29"
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -48,3 +48,7 @@
 [prune]
   go-tests = true
   unused-packages = true
+
+[[constraint]]
+  name = "github.com/patrickmn/go-cache"
+  version = "2.1.0"

cointop/actions.go

@@ -0,0 +1,47 @@
+package cointop
+
+func actionsMap() map[string]bool {
+	return map[string]bool{
+		"first_page":                      true,
+		"help":                            true,
+		"last_page":                       true,
+		"move_to_page_first_row":          true,
+		"move_to_page_last_row":           true,
+		"move_to_page_visible_first_row":  true,
+		"move_to_page_visible_last_row":   true,
+		"move_to_page_visible_middle_row": true,
+		"move_up":                         true,
+		"move_down":                       true,
+		"next_page":                       true,
+		"open_link":                       true,
+		"page_down":                       true,
+		"page_up":                         true,
+		"previous_page":                   true,
+		"quit":                            true,
+		"refresh":                         true,
+		"sort_column_1h_change":           true,
+		"sort_column_24h_change":          true,
+		"sort_column_24h_volume":          true,
+		"sort_column_7d_change":           true,
+		"sort_column_asc":                 true,
+		"sort_column_available_supply":    true,
+		"sort_column_desc":                true,
+		"sort_column_last_updated":        true,
+		"sort_column_market_cap":          true,
+		"sort_column_name":                true,
+		"sort_column_price":               true,
+		"sort_column_rank":                true,
+		"sort_column_symbol":              true,
+		"sort_column_total_supply":        true,
+		"sort_left_column":                true,
+		"sort_right_column":               true,
+		"toggle_row_chart":                true,
+		"open_search":                     true,
+		"toggle_favorite":                 true,
+		"toggle_show_favorites":           true,
+	}
+}
+
+func (ct *Cointop) actionExists(action string) bool {
+	return ct.actionsmap[action]
+}

cointop/cache.go

@@ -0,0 +1,33 @@
+package cointop
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+)
+
+func (ct *Cointop) writeCache(data []byte) error {
+	path := ct.cachePath()
+	err := ioutil.WriteFile(path, data, 0644)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (ct *Cointop) readCache(i interface{}) (interface{}, bool, error) {
+	path := ct.cachePath()
+	b, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, false, err
+	}
+	err = json.Unmarshal(b, &i)
+	if err != nil {
+		return nil, false, err
+	}
+	return i, true, nil
+}
+
+func (ct *Cointop) cachePath() string {
+	return fmt.Sprintf("%v%v", ct.configDirPath(), "/.cache")
+}

cointop/cointop.go

@@ -2,6 +2,7 @@ package cointop
 
 import (
 	"log"
+	"os"
 	"sync"
 	"time"
 
@@ -9,6 +10,7 @@ import (
 	"github.com/miguelmota/cointop/pkg/api"
 	"github.com/miguelmota/cointop/pkg/table"
 	"github.com/miguelmota/cointop/pkg/termui"
+	"github.com/patrickmn/go-cache"
 )
 
 // Cointop cointop
@@ -34,16 +36,23 @@ type Cointop struct {
 	forcerefresh      chan bool
 	selectedcoin      *coin
 	maxtablewidth     int
+	actionsmap        map[string]bool
 	shortcutkeys      map[string]string
 	config            config // toml config
 	searchfield       *gocui.View
 	favorites         map[string]bool
 	filterByFavorites bool
 	savemux           sync.Mutex
+	cache             *cache.Cache
+	debug             bool
 }
 
 // Run runs cointop
 func Run() {
+	var debug bool
+	if os.Getenv("DEBUG") != "" {
+		debug = true
+	}
 	ct := Cointop{
 		api:           api.NewCMC(),
 		refreshticker: time.NewTicker(1 * time.Minute),
@@ -53,8 +62,11 @@ func Run() {
 		perpage:       100,
 		forcerefresh:  make(chan bool),
 		maxtablewidth: 175,
+		actionsmap:    actionsMap(),
 		shortcutkeys:  defaultShortcuts(),
 		favorites:     map[string]bool{},
+		cache:         cache.New(1*time.Minute, 2*time.Minute),
+		debug:         debug,
 	}
 	err := ct.setupConfig()
 	if err != nil {

cointop/config.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"runtime"
 	"strings"
 
 	"github.com/BurntSushi/toml"
@@ -152,11 +151,10 @@ func (ct *Cointop) configToToml() ([]byte, error) {
 }
 
 func (ct *Cointop) loadShortcutsFromConfig() error {
-	actionsmap := actionsMap()
 	for k, ifc := range ct.config.Shortcuts {
 		v, ok := ifc.(string)
 		if ok {
-			if !actionsmap[v] {
+			if !ct.actionExists(v) {
 				continue
 			}
 			if ct.shortcutkeys[k] == "" {
@@ -167,14 +165,3 @@ func (ct *Cointop) loadShortcutsFromConfig() error {
 	}
 	return nil
 }
-
-func userHomeDir() string {
-	if runtime.GOOS == "windows" {
-		home := os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
-		if home == "" {
-			home = os.Getenv("USERPROFILE")
-		}
-		return home
-	}
-	return os.Getenv("HOME")
-}

cointop/debug.go

@@ -0,0 +1,10 @@
+package cointop
+
+import "log"
+
+func (ct *Cointop) debuglog(s string) {
+	if ct.debug {
+		// TODO: do status debug bar
+		log.Println(s)
+	}
+}

cointop/list.go

@@ -1,10 +1,49 @@
 package cointop
 
+import (
+	"encoding/json"
+	"time"
+
+	types "github.com/miguelmota/cointop/pkg/api/types"
+)
+
 func (ct *Cointop) updateCoins() error {
 	list := []*coin{}
-	allcoinsmap, err := ct.api.GetAllCoinData()
-	if err != nil {
-		return err
+	cachekey := "allcoinsmap"
+
+	var err error
+	var allcoinsmap map[string]types.Coin
+	cached, found := ct.cache.Get(cachekey)
+	if found {
+		// cache hit
+		allcoinsmap, _ = cached.(map[string]types.Coin)
+		ct.debuglog("soft cache hit")
+	} else {
+		ifc, ok, _ := ct.readCache(&allcoinsmap)
+		if ok {
+			// hard cache hit
+			if ifc != nil {
+				ct.debuglog("hard cache hit")
+			}
+		}
+	}
+
+	// cache miss
+	if allcoinsmap == nil {
+		ct.debuglog("cache miss")
+		allcoinsmap, err = ct.api.GetAllCoinData()
+		if err != nil {
+			return err
+		}
+		ct.cache.Set(cachekey, allcoinsmap, 10*time.Second)
+		b, err := json.Marshal(allcoinsmap)
+		if err != nil {
+			return err
+		}
+		err = ct.writeCache(b)
+		if err != nil {
+			return err
+		}
 	}
 
 	if len(ct.allcoinsmap) == 0 {

cointop/shortcuts.go

@@ -1,47 +1,5 @@
 package cointop
 
-func actionsMap() map[string]bool {
-	return map[string]bool{
-		"first_page":                      true,
-		"help":                            true,
-		"last_page":                       true,
-		"move_to_page_first_row":          true,
-		"move_to_page_last_row":           true,
-		"move_to_page_visible_first_row":  true,
-		"move_to_page_visible_last_row":   true,
-		"move_to_page_visible_middle_row": true,
-		"move_up":                         true,
-		"move_down":                       true,
-		"next_page":                       true,
-		"open_link":                       true,
-		"page_down":                       true,
-		"page_up":                         true,
-		"previous_page":                   true,
-		"quit":                            true,
-		"refresh":                         true,
-		"sort_column_1h_change":           true,
-		"sort_column_24h_change":          true,
-		"sort_column_24h_volume":          true,
-		"sort_column_7d_change":           true,
-		"sort_column_asc":                 true,
-		"sort_column_available_supply":    true,
-		"sort_column_desc":                true,
-		"sort_column_last_updated":        true,
-		"sort_column_market_cap":          true,
-		"sort_column_name":                true,
-		"sort_column_price":               true,
-		"sort_column_rank":                true,
-		"sort_column_symbol":              true,
-		"sort_column_total_supply":        true,
-		"sort_left_column":                true,
-		"sort_right_column":               true,
-		"toggle_row_chart":                true,
-		"open_search":                     true,
-		"toggle_favorite":                 true,
-		"toggle_show_favorites":           true,
-	}
-}
-
 func defaultShortcuts() map[string]string {
 	return map[string]string{
 		"up":        "move_up",

cointop/util.go

@@ -1,8 +1,36 @@
 package cointop
 
-import "github.com/miguelmota/cointop/pkg/open"
+import (
+	"bytes"
+	"encoding/gob"
+	"os"
+	"runtime"
+
+	"github.com/miguelmota/cointop/pkg/open"
+)
 
 func (ct *Cointop) openLink() error {
 	open.URL(ct.rowLink())
 	return nil
 }
+
+func getBytes(key interface{}) ([]byte, error) {
+	var buf bytes.Buffer
+	enc := gob.NewEncoder(&buf)
+	err := enc.Encode(key)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+func userHomeDir() string {
+	if runtime.GOOS == "windows" {
+		home := os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
+		if home == "" {
+			home = os.Getenv("USERPROFILE")
+		}
+		return home
+	}
+	return os.Getenv("HOME")
+}