Switch to GoLand.

The Coindesk API doesn't have data going all the way back. But since history
isn't changing, we can simply put in known prices.

Also, extend the CDPR cells to have four digits instead of just two.

.golangci.yaml

@@ -0,0 +1,15 @@
+linters:
+  disable-all: true
+  enable:
+  - errcheck
+  - godot
+  - goimports
+  - gosimple
+  - govet
+  - ineffassign
+  - nilerr
+  - nilnil
+  - staticcheck
+  - typecheck
+  - unused
+  - usestdlibvars

.idea/.gitignore

@@ -0,0 +1 @@
+workspace.xml

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/moonmath.iml" filepath="$PROJECT_DIR$/.idea/moonmath.iml" />
+    </modules>
+  </component>
+</project>

.idea/moonmath.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

.vscode/launch.json

@@ -1,20 +0,0 @@
-{
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Launch",
-            "type": "go",
-            "request": "launch",
-            "mode": "debug",
-            "console": "integratedTerminal",
-            "program": "${workspaceFolder}/moonmath.go",
-            "args": [
-                "--config-file",
-                "moonmath.toml"
-            ]
-        }
-    ]
-}

.vscode/settings.json

@@ -1,18 +0,0 @@
-{
-    "cSpell.words": [
-        "alecthomas",
-        "bitcoinity",
-        "Bitfinex",
-        "Bitstamp",
-        "bubbletea",
-        "CDPR",
-        "charmbracelet",
-        "Coindesk",
-        "knadh",
-        "koanf",
-        "lipgloss",
-        "moonmath",
-        "OHLC",
-        "sourcegraph"
-    ]
-}

coindesk/assets.go

@@ -1,5 +1,6 @@
 package coindesk
 
+//goland:noinspection ALL
 const (
 	BTC      Asset = "BTC"
 	ETH      Asset = "ETH"

config/config.go

@@ -16,62 +16,58 @@ import (
 
 var k = koanf.New(".")
 
-func Load(path string) (all All, err error) {
+func Load(filePath string) (r Root, err error) {
 	err = k.Load(structs.Provider(Default, "koanf"), nil)
 	if err != nil {
 		return
 	}
-	if path != "" {
-		err = k.Load(file.Provider(path), yaml.Parser())
+	if filePath != "" {
+		err = k.Load(file.Provider(filePath), yaml.Parser())
 		if err != nil {
 			return
 		}
 	}
-	err = k.Unmarshal("", &all)
-	if err != nil {
-		return
-	}
+	err = k.Unmarshal("", &r)
 
 	return
 }
 
-var Default All
+var Default Root
 
-type All struct {
-	Defaults Data                    `koanf:"defaults"`
-	Assets   map[coindesk.Asset]Data `koanf:"assets"`
+type Root struct {
+	Defaults Asset                    `koanf:"defaults"`
+	Assets   map[coindesk.Asset]Asset `koanf:"assets"`
 }
 
-type Data struct {
+type Asset struct {
 	Asset         coindesk.Asset      `koanf:"asset"`
 	Goals         []moon.Goal         `koanf:"goals"`
 	ConstantBases []moon.ConstantBase `koanf:"constantBases"`
 	RelativeBases []moon.RelativeBase `koanf:"relativeBases"`
 }
 
-func (all All) GetData(asset coindesk.Asset) (data Data) {
-	data, ok := all.Assets[asset]
-	if !ok {
-		data = all.Defaults
-	}
-	if data.Asset == "" {
-		data.Asset = asset
-	}
-	if data.Goals == nil || len(data.Goals) == 0 {
-		data.Goals = all.Defaults.Goals
-	}
-	if data.ConstantBases == nil || len(data.ConstantBases) == 0 {
-		data.ConstantBases = all.Defaults.ConstantBases
-	}
-	if data.RelativeBases == nil || len(data.RelativeBases) == 0 {
-		data.RelativeBases = all.Defaults.RelativeBases
-	}
+func (r Root) ForAsset(a coindesk.Asset) (cfg Asset) {
+	cfg = merge(r.Assets[a], r.Defaults)
+	cfg.Asset = a
 	return
 }
 
+func merge(dst, src Asset) Asset {
+	if len(dst.Goals) == 0 {
+		dst.Goals = src.Goals
+	}
+	if len(dst.ConstantBases) == 0 {
+		dst.ConstantBases = src.ConstantBases
+	}
+	if len(dst.RelativeBases) == 0 {
+		dst.RelativeBases = src.RelativeBases
+	}
+	return dst
+}
+
 // GetBases returns the concatenation of the constant and relative bases, sorted
 // from most recent to least recent in time.
-func GetBases(d *Data) (bases []moon.Base) {
+func GetBases(d *Asset) (bases []moon.Base) {
 	for _, b := range d.ConstantBases {
 		bases = append(bases, b)
 	}

config/default.yaml

@@ -28,6 +28,12 @@ defaults:
     time: 2019-12-31T16:00:00-08:00
   - name: 2017-
     time: 2016-12-31T16:00:00-08:00
+  - name: 2013-
+    time: 2012-12-31T16:00:00-08:00
+    startingPrice: 13.30
+  - name: 2011-
+    time: 2010-12-31T16:00:00-08:00
+    startingPrice: 0.30
 
 assets:
   ETH:
@@ -44,6 +50,11 @@ assets:
       value: 20000
     - name: $25k
       value: 25000
+    constantBases:
+    - name: 2020-
+      time: 2019-12-31T16:00:00-08:00
+    - name: 2017-
+      time: 2016-12-31T16:00:00-08:00
   LTC:
     goals:
     - name: $100

go.mod

@@ -36,8 +36,7 @@ require (
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/muesli/termenv v0.15.2 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	go.uber.org/atomic v1.7.0 // indirect
-	go.uber.org/multierr v1.9.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/sync v0.6.0 // indirect
 	golang.org/x/sys v0.18.0 // indirect
 	golang.org/x/term v0.18.0 // indirect

go.sum

@@ -17,7 +17,6 @@ github.com/charmbracelet/lipgloss v0.10.0/go.mod h1:Wig9DSfvANsxqkRsqj6x87irdy12
 github.com/containerd/console v1.0.4 h1:F2g4+oChYvBTsASRTz8NP6iIAi97J3TtSAsLbIFn4ro=
 github.com/containerd/console v1.0.4/go.mod h1:YynlIjWYF8myEu6sdkwKIvGQq+cOckRm6So2avqoYAk=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fatih/structs v1.1.0 h1:Q7juDM0QtcnhCpeyLGQKyg4TOIghuNXrkL32pHAUMxo=
@@ -75,14 +74,10 @@ github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZV
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/sourcegraph/conc v0.3.0 h1:OQTbbt6P72L20UqAkXXuLOj79LfEanQ+YQFNpLA9ySo=
 github.com/sourcegraph/conc v0.3.0/go.mod h1:Sdozi7LEKbFPqYX2/J+iBAM6HpqSLTASQIKqDmF7Mt0=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
-go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/multierr v1.9.0 h1:7fIwc/ZtS0q++VgcfqFDxSBZVv/Xo49/SYnDFupUwlI=
-go.uber.org/multierr v1.9.0/go.mod h1:X2jQV1h+kxSjClGpnseKVIxpmcjrj7MNnI0bnlfKTVQ=
+go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
+go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 golang.org/x/net v0.22.0 h1:9sGLhx7iRIHEiX0oAJ3MRZMUCElJgy7Br1nO+AMN3Tc=
 golang.org/x/net v0.22.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
 golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=

moon/moon.go

@@ -2,6 +2,7 @@ package moon
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math"
 	"time"
@@ -75,30 +76,10 @@ func (m *Math) Refresh(ctx context.Context) (err error) {
 	tasks.WithMaxGoroutines(len(m.Columns))
 	//tasks.WithMaxGoroutines(1)
 	now := time.Now()
-
 	for i := range m.Columns {
 		c := &m.Columns[i]
 		tasks.Go(func() error {
-			c.StartingDate = c.Base.From(now)
-			nextDay := c.StartingDate.Add(time.Hour * 24)
-			resp, err := coindesk.GetPriceValues(ctx,
-				m.Asset, c.StartingDate, nextDay)
-			if err != nil {
-				return err
-			}
-			if len(resp.Data.Entries) == 0 {
-				c.Projections.Dates = nil
-				return nil
-			}
-			c.StartingPrice = resp.Data.Entries[0].Price
-			c.Gain = float64(m.CurrentPrice) / float64(c.StartingPrice)
-			days := now.Sub(c.StartingDate).Hours() / 24
-			c.CDPR = CDPR(days, c.Gain)
-			c.Projections = ProjectDates(
-				now, float64(m.CurrentPrice),
-				c.CDPR, m.Goals,
-			)
-			return nil
+			return c.project(ctx, m, now)
 		})
 	}
 	err = tasks.Wait()
@@ -115,46 +96,49 @@ type Column struct {
 	Projections   Projection
 }
 
-func (c *Column) Column() (entries []string) {
-	entries = append(entries, fmt.Sprintf("$%.2f", c.StartingPrice))
-	entries = append(entries, fmt.Sprintf("%.2f%%", (c.CDPR-1)*100))
-	never := c.CDPR <= 1
-	for i := range c.Projections.Dates {
-		var cell string
-		if never {
-			cell = "NEVER!!!!!"
-		} else {
-			cell = c.
-				Projections.
-				Dates[i].
-				Format("2006-01-02")
-		}
-		entries = append(entries, cell)
+func (c *Column) project(ctx context.Context, m *Math, now time.Time) (err error) {
+	err = c.fillStartingPrice(ctx, m.Asset, now)
+	if err != nil {
+		return
 	}
+
+	c.Gain = float64(m.CurrentPrice) / float64(c.StartingPrice)
+	days := now.Sub(c.StartingDate).Hours() / 24
+	c.CDPR = CDPR(days, c.Gain)
+	c.Projections = ProjectDates(
+		now, float64(m.CurrentPrice),
+		c.CDPR, m.Goals,
+	)
 	return
 }
 
-var DefaultGoals = []Goal{
-	{"$100k", 100000},
-	{"$150k", 150000},
-	{"$200k", 200000},
-	{"$250k", 250000},
-	{"$300k", 300000},
-	{"$500k", 500000},
-	{"$1m", 1000000},
+func (c *Column) fillStartingPrice(
+	ctx context.Context, asset coindesk.Asset, now time.Time,
+) error {
+	// if base provides a hardcoded starting price, use it
+	c.StartingDate = c.Base.From(now)
+	c.StartingPrice = coindesk.Price(c.Base.GetStartingPrice())
+	if c.StartingPrice != 0 {
+		return nil
+	}
+
+	// otherwise, look up the starting price via Coindesk
+	nextDay := c.StartingDate.Add(time.Hour * 24)
+	resp, err := coindesk.GetPriceValues(ctx, asset, c.StartingDate, nextDay)
+	if err != nil {
+		err = fmt.Errorf("getting price for %s on %v: %w",
+			asset, c.StartingDate, err)
+		return err
+	}
+	if len(resp.Data.Entries) == 0 {
+		c.Projections.Dates = nil
+		return errEmptyPriceEntries
+	}
+	c.StartingPrice = resp.Data.Entries[0].Price
+	return nil
 }
 
-var DefaultConstantBases = []ConstantBase{
-	{"2020-", time.Unix(1577836800, 0)},
-	{"2017-", time.Unix(1483228800, 0)},
-}
-
-var DefaultRelativeBases = []RelativeBase{
-	{"Month", time.Duration(-30) * time.Hour * 24},
-	{"Quarter", time.Duration(-90) * time.Hour * 24},
-	{"Half-Year", time.Duration(-182) * time.Hour * 24},
-	{"Year", time.Duration(-365) * time.Hour * 24},
-}
+var errEmptyPriceEntries = errors.New("price values response has no entries")
 
 type Goal struct {
 	Name  string  `koanf:"name"`
@@ -165,12 +149,14 @@ type Goal struct {
 type Base interface {
 	From(now time.Time) time.Time
 	Label() string
+	GetStartingPrice() float64
 }
 
 // ConstantBase is a base that is a constant time, e.g. 2020-01-01.
 type ConstantBase struct {
-	Name string    `koanf:"name"`
-	Time time.Time `koanf:"time"`
+	Name          string    `koanf:"name"`
+	Time          time.Time `koanf:"time"`
+	StartingPrice float64   `koanf:"startingPrice"`
 }
 
 func (cb ConstantBase) From(_ time.Time) time.Time {
@@ -181,17 +167,25 @@ func (cb ConstantBase) Label() string {
 	return cb.Name
 }
 
-// RelativeBase is a base that is relative, e.g. "90 days ago."
+func (cb ConstantBase) GetStartingPrice() float64 {
+	return cb.StartingPrice
+}
+
+// RelativeBase is a base that is relative, e.g. "90 days ago".
 type RelativeBase struct {
 	Name   string        `koanf:"name"`
 	Offset time.Duration `koanf:"offset"`
 }
 
 func (rb RelativeBase) From(now time.Time) time.Time {
-	then := now.Add(time.Duration(rb.Offset))
+	then := now.Add(rb.Offset)
 	return then
 }
 
 func (rb RelativeBase) Label() string {
 	return rb.Name
 }
+
+func (rb RelativeBase) GetStartingPrice() float64 {
+	return 0
+}

moon/moon_test.go

@@ -11,6 +11,14 @@ func TestCDPR(t *testing.T) {
 }
 
 func TestProjection(t *testing.T) {
-	p := moon.ProjectDates(time.Now(), 68900, 1.0055, moon.DefaultGoals)
+	p := moon.ProjectDates(time.Now(), 68900, 1.0055, []moon.Goal{
+		{"$100k", 100000},
+		{"$150k", 150000},
+		{"$200k", 200000},
+		{"$250k", 250000},
+		{"$300k", 300000},
+		{"$500k", 500000},
+		{"$1m", 1000000},
+	})
 	_ = p
 }

tui/asset/asset.go

@@ -30,7 +30,7 @@ type Msg struct {
 	inner tea.Msg
 }
 
-func New(cfg config.Data) (m Model) {
+func New(cfg config.Asset) (m Model) {
 	m.math = moon.NewMath(
 		cfg.Asset,
 		cfg.Goals,
@@ -89,10 +89,6 @@ func New(cfg config.Data) (m Model) {
 	return
 }
 
-func (m Model) Handles(a coindesk.Asset) bool {
-	return m.math.Asset == a
-}
-
 func (m Model) Init() tea.Cmd {
 	return tea.Batch(
 		m.indicator.Tick,
@@ -102,6 +98,10 @@ func (m Model) Init() tea.Cmd {
 	)
 }
 
+func (m Model) Handles(a coindesk.Asset) bool {
+	return m.math.Asset == a
+}
+
 func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 	switch msg := msg.(type) {
 	case Msg:
@@ -112,18 +112,19 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			return m, tea.Batch(
 				m.resumeIndicator,
 				m.refresh,
+				m.scheduleRefresh(),
 			)
 		case update:
-			commands := []tea.Cmd{m.scheduleRefresh()}
+			var cmd tea.Cmd
 			if msg.err == nil {
 				m.math = msg.math
 				refillProperties(&m)
 				refillProjections(&m)
-				commands = append(commands, m.stopIndicator())
+				cmd = m.stopIndicator()
 			} else {
 				m.indicator.Style = indicatorErrorStyle
 			}
-			return m, tea.Batch(commands...)
+			return m, cmd
 		case stopIndicator:
 			m.refreshing = false
 			return m, nil
@@ -147,9 +148,9 @@ type update struct {
 type stopIndicator struct{}
 
 func (m Model) refresh() tea.Msg {
-	ctx, cancel := context.WithDeadline(
+	ctx, cancel := context.WithTimeout(
 		context.Background(),
-		time.Now().Add(time.Second*15))
+		refreshTimeout)
 	defer cancel()
 	err := m.math.Refresh(ctx)
 	if err != nil {
@@ -166,7 +167,7 @@ func (m Model) resumeIndicator() tea.Msg {
 }
 
 func (m Model) scheduleRefresh() tea.Cmd {
-	return tea.Tick(time.Second*30,
+	return tea.Tick(refreshInterval,
 		func(t time.Time) tea.Msg {
 			return Msg{m.math.Asset, refresh{}}
 		})
@@ -175,12 +176,16 @@ func (m Model) scheduleRefresh() tea.Cmd {
 func (m Model) stopIndicator() tea.Cmd {
 	// wait a bit to stop the indicator, so that it's more obvious
 	// even when the refresh completes quickly.
-	return tea.Tick(time.Millisecond*500,
+	return tea.Tick(stopIndicatorDelay,
 		func(t time.Time) tea.Msg {
 			return Msg{m.math.Asset, stopIndicator{}}
 		})
 }
 
+var refreshInterval = time.Second * 30
+var refreshTimeout = time.Second * 15
+var stopIndicatorDelay = time.Millisecond * 500
+
 func refillProperties(m *Model) {
 	rows := []table.Row{
 		{"Asset", string(m.math.Asset)},
@@ -190,14 +195,34 @@ func refillProperties(m *Model) {
 }
 
 func refillProjections(m *Model) {
-	rows := []table.Row{m.math.Labels}
+	cols := []table.Row{m.math.Labels}
 	for i := range m.math.Columns {
-		rows = append(rows, m.math.Columns[i].Column())
+		entries := renderEntries(m.math.Columns[i])
+		cols = append(cols, entries)
 	}
-	rows = transpose(rows)
+	rows := transpose(cols)
 	m.projections.SetRows(rows)
 }
 
+func renderEntries(c moon.Column) (entries []string) {
+	entries = append(entries, fmt.Sprintf("$%.2f", c.StartingPrice))
+	entries = append(entries, fmt.Sprintf("%.4f%%", (c.CDPR-1)*100))
+	never := c.CDPR <= 1
+	for i := range c.Projections.Dates {
+		var cell string
+		if never {
+			cell = "NEVER!!!!!"
+		} else {
+			cell = c.
+				Projections.
+				Dates[i].
+				Format("2006-01-02")
+		}
+		entries = append(entries, cell)
+	}
+	return
+}
+
 func transpose(slice []table.Row) []table.Row {
 	xl := len(slice[0])
 	yl := len(slice)

tui/perf/perf.go

@@ -22,7 +22,7 @@ func (m Model) Init() tea.Cmd {
 	return nil
 }
 
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+func (m Model) Update(_ tea.Msg) (Model, tea.Cmd) {
 	return m, nil
 }
 

tui/tui.go

@@ -17,17 +17,16 @@ type Model struct {
 	displayStats bool
 }
 
-func New(assets []coindesk.Asset, cfg config.All, displayStats bool) (m Model) {
+func New(assets []coindesk.Asset, cfg config.Root, displayStats bool) (m Model) {
 	m.stats = perf.New()
 	m.displayStats = displayStats
-	// construct models for each asset, but don't filter out dupes
+	// construct models for each asset, but remove dupes
 	seen := map[coindesk.Asset]struct{}{}
 	for _, a := range assets {
-		_, ok := seen[a]
-		if ok {
+		if _, ok := seen[a]; ok {
 			continue
 		}
-		assetCfg := cfg.GetData(a)
+		assetCfg := cfg.ForAsset(a)
 		assetModel := asset.New(assetCfg)
 		m.assets = append(m.assets, assetModel)
 		seen[a] = struct{}{}