Minor reformatting.

Instead of pre-allocating the grid and using tricky indexing to fill in
the cells, just fully regenerate it. But do it columnwise first, and
then transpose it.

.vscode/launch.json

@@ -5,14 +5,16 @@
     "version": "0.2.0",
     "configurations": [
         {
-            "name": "Launch file",
+            "name": "Launch",
             "type": "go",
             "request": "launch",
             "mode": "debug",
             "console": "integratedTerminal",
-            "program": "${file}"
+            "program": "${workspaceFolder}/moonmath.go",
+            "args": [
+                "--config-file",
+                "moonmath.toml"
+            ]
         }
-
-
     ]
 }

.vscode/settings.json

@@ -1,5 +1,6 @@
 {
     "cSpell.words": [
+        "alecthomas",
         "bitcoinity",
         "Bitfinex",
         "Bitstamp",
@@ -7,6 +8,8 @@
         "CDPR",
         "charmbracelet",
         "Coindesk",
+        "knadh",
+        "koanf",
         "lipgloss",
         "moonmath",
         "OHLC",

README.md

@@ -12,6 +12,14 @@ program. It's written in Go using the [Bubble Tea][tea] library, and uses
 [tea]: https://github.com/charmbracelet/bubbletea
 [coin]: https://www.coindesk.com
 
+### Configuration
+
+By default, the program will use Bitcoin along with various goals and bases
+of comparison. With the `--config-file` flag, however, one can specify a TOML
+file that overrides these defaults.
+
+See [this one for Ethereum](./config/eth.toml) for an example.
+
 ### "Theory"
 
 Given a pair of quotes taken at the start and end of some period,
@@ -39,8 +47,7 @@ $$ x = {{log(p_f) - log(p_e)} \over log(r)} $$
 
 ### Future Improvements
 
-* Support other assets available from Coindesk.
+* Add more default configurations for various assets.
-* Configurable projection milestones.
 * Allow projection by date, e.g. use the CDPR to calculate what the price
   would be on a particular date.
 * Log errors to a file.

bitcoinity/model_test.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"testing"
 
-	"code.humancabbage.net/moonmath/bitcoinity"
+	"code.humancabbage.net/sam/moonmath/bitcoinity"
 )
 
 func TestUnmarshalGetTickerResponse(t *testing.T) {

coindesk/asset_tickers.json

@@ -0,0 +1 @@
+{"statusCode":200,"message":"OK","data":{"BTC":{"iso":"BTC","name":"Bitcoin","slug":"bitcoin","change":{"percent":-6.3,"value":-4187.634882541},"ohlc":{"o":66436.26558132548,"h":66436.26558132548,"l":61526.78744328402,"c":62248.630698784444},"circulatingSupply":19658987,"marketCap":1223745021675.2043,"ts":1710898259000,"src":"tb"}}}

coindesk/assets.go

@@ -0,0 +1,326 @@
+package coindesk
+
+const (
+	BTC      Asset = "BTC"
+	ETH      Asset = "ETH"
+	XRP      Asset = "XRP"
+	BCH      Asset = "BCH"
+	EOS      Asset = "EOS"
+	XLM      Asset = "XLM"
+	LTC      Asset = "LTC"
+	ADA      Asset = "ADA"
+	XMR      Asset = "XMR"
+	DASH     Asset = "DASH"
+	IOTA     Asset = "IOTA"
+	TRX      Asset = "TRX"
+	NEO      Asset = "NEO"
+	ETC      Asset = "ETC"
+	XEM      Asset = "XEM"
+	ZEC      Asset = "ZEC"
+	BTG      Asset = "BTG"
+	LSK      Asset = "LSK"
+	QTUM     Asset = "QTUM"
+	BSV      Asset = "BSV"
+	DOGE     Asset = "DOGE"
+	DCR      Asset = "DCR"
+	USDT     Asset = "USDT"
+	USDC     Asset = "USDC"
+	LINK     Asset = "LINK"
+	XTZ      Asset = "XTZ"
+	ZRX      Asset = "ZRX"
+	DAI      Asset = "DAI"
+	BAT      Asset = "BAT"
+	OXT      Asset = "OXT"
+	ALGO     Asset = "ALGO"
+	ATOM     Asset = "ATOM"
+	KNC      Asset = "KNC"
+	OMG      Asset = "OMG"
+	ANT      Asset = "ANT"
+	REP      Asset = "REP"
+	BAND     Asset = "BAND"
+	BTT      Asset = "BTT"
+	MANA     Asset = "MANA"
+	FET      Asset = "FET"
+	ICX      Asset = "ICX"
+	KAVA     Asset = "KAVA"
+	LRC      Asset = "LRC"
+	MKR      Asset = "MKR"
+	MLN      Asset = "MLN"
+	NANO     Asset = "NANO"
+	NMR      Asset = "NMR"
+	PAXG     Asset = "PAXG"
+	USDP     Asset = "USDP"
+	SC       Asset = "SC"
+	STORJ    Asset = "STORJ"
+	WAVES    Asset = "WAVES"
+	FIL      Asset = "FIL"
+	CVC      Asset = "CVC"
+	DNT      Asset = "DNT"
+	REN      Asset = "REN"
+	BNT      Asset = "BNT"
+	WBTC     Asset = "WBTC"
+	GRT      Asset = "GRT"
+	UNI      Asset = "UNI"
+	DOT      Asset = "DOT"
+	YFI      Asset = "YFI"
+	AAVE     Asset = "AAVE"
+	MATIC    Asset = "MATIC"
+	AMP      Asset = "AMP"
+	CELO     Asset = "CELO"
+	COMP     Asset = "COMP"
+	CRV      Asset = "CRV"
+	RLC      Asset = "RLC"
+	KSM      Asset = "KSM"
+	NKN      Asset = "NKN"
+	SHIB     Asset = "SHIB"
+	SKL      Asset = "SKL"
+	SNX      Asset = "SNX"
+	LUNC     Asset = "LUNC"
+	UMA      Asset = "UMA"
+	ICP      Asset = "ICP"
+	SOL      Asset = "SOL"
+	AVAX     Asset = "AVAX"
+	UST      Asset = "UST"
+	ENJ      Asset = "ENJ"
+	IOTX     Asset = "IOTX"
+	AXS      Asset = "AXS"
+	XYO      Asset = "XYO"
+	SUSHI    Asset = "SUSHI"
+	ANKR     Asset = "ANKR"
+	CHZ      Asset = "CHZ"
+	LPT      Asset = "LPT"
+	COTI     Asset = "COTI"
+	KEEP     Asset = "KEEP"
+	SAND     Asset = "SAND"
+	GALA     Asset = "GALA"
+	APE      Asset = "APE"
+	CRO      Asset = "CRO"
+	ACHP     Asset = "ACHP"
+	JASMY    Asset = "JASMY"
+	REQ      Asset = "REQ"
+	SLP      Asset = "SLP"
+	NEAR     Asset = "NEAR"
+	MBOX     Asset = "MBOX"
+	POLIS    Asset = "POLIS"
+	MOVR     Asset = "MOVR"
+	POLS     Asset = "POLS"
+	QUICK    Asset = "QUICK"
+	MINA     Asset = "MINA"
+	IMX      Asset = "IMX"
+	XEC      Asset = "XEC"
+	NEXO     Asset = "NEXO"
+	RUNE     Asset = "RUNE"
+	QNT      Asset = "QNT"
+	VET      Asset = "VET"
+	CAKE     Asset = "CAKE"
+	BNB      Asset = "BNB"
+	THETA    Asset = "THETA"
+	HBAR     Asset = "HBAR"
+	FTM      Asset = "FTM"
+	RVN      Asset = "RVN"
+	ZIL      Asset = "ZIL"
+	DGB      Asset = "DGB"
+	FTT      Asset = "FTT"
+	ENS      Asset = "ENS"
+	WRX      Asset = "WRX"
+	WAXP     Asset = "WAXP"
+	EGLD     Asset = "EGLD"
+	BUSD     Asset = "BUSD"
+	CEL      Asset = "CEL"
+	OP       Asset = "OP"
+	LUNA     Asset = "LUNA"
+	RAY      Asset = "RAY"
+	FLOW     Asset = "FLOW"
+	AUDIO    Asset = "AUDIO"
+	CKB      Asset = "CKB"
+	VGX      Asset = "VGX"
+	YGG      Asset = "YGG"
+	CHR      Asset = "CHR"
+	STMX     Asset = "STMX"
+	SXP      Asset = "SXP"
+	INJ      Asset = "INJ"
+	JOE      Asset = "JOE"
+	POLY     Asset = "POLY"
+	STX      Asset = "STX"
+	SFP      Asset = "SFP"
+	FARM     Asset = "FARM"
+	XVG      Asset = "XVG"
+	CLV      Asset = "CLV"
+	WOO      Asset = "WOO"
+	GLMR     Asset = "GLMR"
+	STEEM    Asset = "STEEM"
+	RARE     Asset = "RARE"
+	IDEX     Asset = "IDEX"
+	SRM      Asset = "SRM"
+	PYR      Asset = "PYR"
+	MIR      Asset = "MIR"
+	SYS      Asset = "SYS"
+	ALPACA   Asset = "ALPACA"
+	QSP      Asset = "QSP"
+	SCRT     Asset = "SCRT"
+	SUN      Asset = "SUN"
+	APT      Asset = "APT"
+	MASK     Asset = "MASK"
+	DYDX     Asset = "DYDX"
+	CVX      Asset = "CVX"
+	GMT      Asset = "GMT"
+	CTSI     Asset = "CTSI"
+	METIS    Asset = "METIS"
+	FORTH    Asset = "FORTH"
+	RBN      Asset = "RBN"
+	SAMO     Asset = "SAMO"
+	SPELL    Asset = "SPELL"
+	LDO      Asset = "LDO"
+	ARB      Asset = "ARB"
+	BLUR     Asset = "BLUR"
+	GAS      Asset = "GAS"
+	RACA     Asset = "RACA"
+	BABYDOGE Asset = "BABYDOGE"
+	FLOKI    Asset = "FLOKI"
+	HOT      Asset = "HOT"
+	BFC      Asset = "BFC"
+	KISHU    Asset = "KISHU"
+	ELON     Asset = "ELON"
+	SAITAMA  Asset = "SAITAMA"
+	REEF     Asset = "REEF"
+	CEEK     Asset = "CEEK"
+	ATLAS    Asset = "ATLAS"
+	LOOKS    Asset = "LOOKS"
+	WIN      Asset = "WIN"
+	ONE      Asset = "ONE"
+	DENT     Asset = "DENT"
+	GST      Asset = "GST"
+	TWT      Asset = "TWT"
+	HNT      Asset = "HNT"
+	AGLD     Asset = "AGLD"
+	BTRST    Asset = "BTRST"
+	ETHW     Asset = "ETHW"
+	ILV      Asset = "ILV"
+	RARI     Asset = "RARI"
+	STG      Asset = "STG"
+	SYN      Asset = "SYN"
+	TOKE     Asset = "TOKE"
+	BLZ      Asset = "BLZ"
+	FLR      Asset = "FLR"
+	FIS      Asset = "FIS"
+	GNS      Asset = "GNS"
+	ID       Asset = "ID"
+	PEPE     Asset = "PEPE"
+	DIA      Asset = "DIA"
+	TLM      Asset = "TLM"
+	XCN      Asset = "XCN"
+	BIT      Asset = "BIT"
+	RPL      Asset = "RPL"
+	RNDR     Asset = "RNDR"
+	ONEINCH  Asset = "1INCH"
+	BAL      Asset = "BAL"
+	T        Asset = "T"
+	GNO      Asset = "GNO"
+	ASTR     Asset = "ASTR"
+	GLM      Asset = "GLM"
+	OCEAN    Asset = "OCEAN"
+	BICO     Asset = "BICO"
+	CELR     Asset = "CELR"
+	LQTY     Asset = "LQTY"
+	TRAC     Asset = "TRAC"
+	ZEN      Asset = "ZEN"
+	API3     Asset = "API3"
+	PLA      Asset = "PLA"
+	AXL      Asset = "AXL"
+	HFT      Asset = "HFT"
+	MC       Asset = "MC"
+	C98      Asset = "C98"
+	GAL      Asset = "GAL"
+	GTC      Asset = "GTC"
+	RAD      Asset = "RAD"
+	POWR     Asset = "POWR"
+	POND     Asset = "POND"
+	ALICE    Asset = "ALICE"
+	TRU      Asset = "TRU"
+	OGN      Asset = "OGN"
+	DAR      Asset = "DAR"
+	BADGER   Asset = "BADGER"
+	GHST     Asset = "GHST"
+	LCX      Asset = "LCX"
+	ARPA     Asset = "ARPA"
+	MXC      Asset = "MXC"
+	PERP     Asset = "PERP"
+	LOKA     Asset = "LOKA"
+	BOBA     Asset = "BOBA"
+	BOND     Asset = "BOND"
+	ALCX     Asset = "ALCX"
+	KP3R     Asset = "KP3R"
+	TON      Asset = "TON"
+	AR       Asset = "AR"
+	AVA      Asset = "AVA"
+	BONE     Asset = "BONE"
+	BONK     Asset = "BONK"
+	CORE     Asset = "CORE"
+	CSPR     Asset = "CSPR"
+	DG       Asset = "DG"
+	ERN      Asset = "ERN"
+	FXS      Asset = "FXS"
+	GMX      Asset = "GMX"
+	GT       Asset = "GT"
+	GUSD     Asset = "GUSD"
+	HMT      Asset = "HMT"
+	HT       Asset = "HT"
+	KCS      Asset = "KCS"
+	KLAY     Asset = "KLAY"
+	LEO      Asset = "LEO"
+	MPL      Asset = "MPL"
+	OKB      Asset = "OKB"
+	PIT      Asset = "PIT"
+	OSMO     Asset = "OSMO"
+	RLY      Asset = "RLY"
+	SANTOS   Asset = "SANTOS"
+	SUI      Asset = "SUI"
+	SWEAT    Asset = "SWEAT"
+	TUSD     Asset = "TUSD"
+	TVK      Asset = "TVK"
+	UNFI     Asset = "UNFI"
+	USDD     Asset = "USDD"
+	VLX      Asset = "VLX"
+	WEMIX    Asset = "WEMIX"
+	XDC      Asset = "XDC"
+	XRD      Asset = "XRD"
+	FB       Asset = "FB"
+	BRISE    Asset = "BRISE"
+	KAS      Asset = "KAS"
+	XEN      Asset = "XEN"
+	HAM      Asset = "HAM"
+	TAMA     Asset = "TAMA"
+	KDA      Asset = "KDA"
+	CFX      Asset = "CFX"
+	VRA      Asset = "VRA"
+	BDX      Asset = "BDX"
+	RDNT     Asset = "RDNT"
+	WLD      Asset = "WLD"
+	AGIX     Asset = "AGIX"
+	PYUSD    Asset = "PYUSD"
+	MOON     Asset = "MOON"
+	SEI      Asset = "SEI"
+	AKT      Asset = "AKT"
+	MAGIC    Asset = "MAGIC"
+	SNT      Asset = "SNT"
+	ALPHA    Asset = "ALPHA"
+	ALI      Asset = "ALI"
+	CQT      Asset = "CQT"
+	HIGH     Asset = "HIGH"
+	AERGO    Asset = "AERGO"
+	GODS     Asset = "GODS"
+	ZBC      Asset = "ZBC"
+	ACA      Asset = "ACA"
+	MDT      Asset = "MDT"
+	LIT      Asset = "LIT"
+	QI       Asset = "QI"
+	AURORA   Asset = "AURORA"
+	TOMI     Asset = "TOMI"
+	XCH      Asset = "XCH"
+	MANTA    Asset = "MANTA"
+	PYTH     Asset = "PYTH"
+	STRK     Asset = "STRK"
+	ETHFI    Asset = "ETHFI"
+	TIA      Asset = "TIA"
+	EETH     Asset = "EETH"
+)

coindesk/lib_test.go

@@ -1,29 +0,0 @@
-package coindesk_test
-
-import (
-	"context"
-	"fmt"
-	"testing"
-	"time"
-
-	"code.humancabbage.net/moonmath/coindesk"
-)
-
-func TestXxx(t *testing.T) {
-	now := time.Now()
-	then := now.Add(time.Duration(-24) * time.Hour)
-
-	values, err := coindesk.GetPriceValues(context.Background(), coindesk.BTC, then, now)
-	if err != nil {
-		t.Errorf("test failure: %v", err)
-	}
-	_ = values
-	fmt.Println()
-
-	tickers, err := coindesk.GetAssetTickers(context.Background(), coindesk.BTC, coindesk.ETH)
-	if err != nil {
-		t.Errorf("test failure: %v", err)
-	}
-	_ = tickers
-	fmt.Println()
-}

coindesk/model.go

@@ -10,13 +10,6 @@ import (
 // Asset is a cryptocurrency, like Bitcoin, Ethereum, etc.
 type Asset string
 
-const (
-	// BTC is the Bitcoin asset.
-	BTC Asset = "BTC"
-	// ETH is the Ethereum asset.
-	ETH Asset = "ETH"
-)
-
 // Response represents the general top-level format of Coindesk API responses.
 type Response[T any] struct {
 	StatusCode int    `json:"statusCode"`

coindesk/model_test.go

@@ -0,0 +1,31 @@
+package coindesk_test
+
+import (
+	_ "embed"
+	"encoding/json"
+	"testing"
+
+	"code.humancabbage.net/sam/moonmath/coindesk"
+)
+
+func TestUnmarshalPriceValues(t *testing.T) {
+	testUnmarshalResponse[coindesk.PriceValues](t, priceValuesJson)
+}
+
+func TestUnmarshalAssetTickers(t *testing.T) {
+	testUnmarshalResponse[coindesk.AssetTickers](t, assetTickersJson)
+}
+
+func testUnmarshalResponse[T any](t *testing.T, jsonBytes []byte) {
+	var resp coindesk.Response[T]
+	err := json.Unmarshal(jsonBytes, &resp)
+	if err != nil {
+		t.Errorf("failed to unmarshal JSON: %v", err)
+	}
+}
+
+//go:embed price_values.json
+var priceValuesJson []byte
+
+//go:embed asset_tickers.json
+var assetTickersJson []byte

coindesk/price_values.json

@@ -0,0 +1 @@
+{"statusCode":200,"message":"OK","data":{"iso":"BTC","name":"Bitcoin","slug":"bitcoin","ingestionStart":"2014-11-03","interval":"15m","src":"tb","entries":[[1710548099000,69784.6599201257],[1710548999000,69907.6435505413],[1710549899000,69735.0244223474],[1710550799000,69608.3777481736],[1710551699000,69643.5872644923],[1710552599000,69389.4883714119],[1710553499000,69350.2996335944],[1710554399000,69241.2719800575],[1710555299000,69110.5930246779],[1710556199000,69046.5706710773],[1710557099000,69209.8770692447],[1710557999000,69069.0204183649],[1710558899000,69317.6327892521],[1710559799000,69175.2057532632],[1710560699000,69237.706076427],[1710561599000,69206.0448006493],[1710562499000,69077.8264056849],[1710563399000,69161.0784263752],[1710564299000,68903.1424009851],[1710565199000,68994.5234182921],[1710566099000,68754.9875193438],[1710566999000,68784.6200740683],[1710567899000,69002.1375650817],[1710568799000,68975.0878307215],[1710569699000,69045.2310776643],[1710570599000,69025.7239355934],[1710571499000,69068.3988090268],[1710572399000,69185.2444741912],[1710573299000,69246.5439171529],[1710574199000,69278.2574941136],[1710575099000,69407.4780576693],[1710575999000,69406.4527711537],[1710576899000,69296.4923727422],[1710577799000,69165.948416751],[1710578699000,69258.7912250956],[1710579599000,69017.1102984366],[1710580499000,69014.4480481396],[1710581399000,69099.3096696255],[1710582299000,69011.246072562],[1710583199000,68942.5343294262],[1710584099000,68697.8235476743],[1710584999000,68597.1119491188],[1710585899000,68532.2931864276],[1710586799000,68420.1712986066],[1710587699000,68354.8847177761],[1710588599000,67949.5219527423],[1710589499000,68327.2101380853],[1710590399000,68260.6576285653],[1710591299000,68192.7968537126],[1710592199000,68302.103987459],[1710593099000,68096.4362930929],[1710593999000,67906.8863092216],[1710594899000,67982.183818933],[1710595799000,68073.3862259585],[1710596699000,67891.8144823227],[1710597599000,67706.923652975],[1710598499000,67942.4174766702],[1710599399000,67848.3672161555],[1710600299000,67975.9404080798],[1710601199000,68177.0804610881],[1710602099000,67994.5903423281],[1710602999000,68024.8507494152],[1710603899000,68201.8594048759],[1710604799000,68358.4188016011],[1710605699000,68239.5960888028],[1710606599000,68224.3438496054],[1710607499000,68293.736596961],[1710608399000,68158.4057208716],[1710609299000,68114.4234280406],[1710610199000,67829.2127954109],[1710611099000,67630.8190396486],[1710611999000,67220.3085172518],[1710612899000,67043.4786652409],[1710613799000,66906.1713676385],[1710614699000,66871.2079622553],[1710615599000,67015.8311895788],[1710616499000,67458.766887969],[1710617399000,67493.9852796663],[1710618299000,67354.2332686561],[1710619199000,66916.4704143146],[1710620099000,66995.7196236024],[1710620999000,67046.4965828003],[1710621899000,67402.0503271179],[1710622799000,67087.3064846683],[1710623699000,66943.270112864],[1710624599000,66268.8656111216],[1710625499000,66290.9133774055],[1710626399000,66189.3483322972],[1710627299000,66073.8513767399],[1710628199000,66433.8329094007],[1710629099000,66549.3543050487],[1710629999000,66331.1108451565],[1710630899000,65376.9600942977],[1710631799000,65280.3933464042],[1710632699000,65598.1187015513],[1710633599000,65261.5180497119],[1710634499000,65780.8283123471]]}}

config/config.go

@@ -0,0 +1,79 @@
+package config
+
+import (
+	"slices"
+	"time"
+
+	"code.humancabbage.net/sam/moonmath/coindesk"
+	"code.humancabbage.net/sam/moonmath/moon"
+	"github.com/knadh/koanf/parsers/toml"
+	"github.com/knadh/koanf/providers/file"
+	"github.com/knadh/koanf/providers/structs"
+	"github.com/knadh/koanf/v2"
+)
+
+var k = koanf.New(".")
+
+func Load(path string) (data Data, err error) {
+	err = k.Load(structs.Provider(Default, "koanf"), nil)
+	if err != nil {
+		return
+	}
+	if path != "" {
+		err = k.Load(file.Provider(path), toml.Parser())
+		if err != nil {
+			return
+		}
+	}
+	err = k.Unmarshal("", &data)
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+var Default = Data{
+	Asset:         coindesk.BTC,
+	Goals:         moon.DefaultGoals,
+	ConstantBases: moon.DefaultConstantBases,
+	RelativeBases: moon.DefaultRelativeBases,
+}
+
+type Data struct {
+	Asset         coindesk.Asset      `koanf:"asset"`
+	Goals         []moon.Goal         `koanf:"goals"`
+	ConstantBases []moon.ConstantBase `koanf:"constantBases"`
+	RelativeBases []moon.RelativeBase `koanf:"relativeBases"`
+}
+
+type Goal struct {
+	Name  string  `koanf:"name"`
+	Value float64 `koanf:"value"`
+}
+
+// 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) {
+	for _, b := range d.ConstantBases {
+		bases = append(bases, b)
+	}
+	for _, b := range d.RelativeBases {
+		bases = append(bases, b)
+	}
+	now := time.Now()
+	slices.SortFunc(bases, func(a, b moon.Base) int {
+		aTime := a.From(now)
+		bTime := b.From(now)
+		aFirst := aTime.Before(bTime)
+		bFirst := bTime.Before(aTime)
+		switch {
+		case aFirst:
+			return 1
+		case bFirst:
+			return -1
+		}
+		return 0
+	})
+	return
+}

config/eth.toml

@@ -0,0 +1,25 @@
+asset = "ETH"
+
+[[goals]]
+name = "$5k"
+value = 5000
+
+[[goals]]
+name = "$7.5k"
+value = 7500
+
+[[goals]]
+name = "$10k"
+value = 10000
+
+[[goals]]
+name = "$15k"
+value = 15000
+
+[[goals]]
+name = "$20k"
+value = 15000
+
+[[goals]]
+name = "$25k"
+value = 25000

go.mod

@@ -1,4 +1,4 @@
-module code.humancabbage.net/moonmath
+module code.humancabbage.net/sam/moonmath
 
 go 1.22.1
 
@@ -12,16 +12,28 @@ require (
 )
 
 require (
+	github.com/alecthomas/kong v0.9.0 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/containerd/console v1.0.4 // indirect
+	github.com/fatih/structs v1.1.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1 // indirect
+	github.com/knadh/koanf/maps v0.1.1 // indirect
+	github.com/knadh/koanf/parsers/toml v0.1.0 // indirect
+	github.com/knadh/koanf/providers/file v0.1.0 // indirect
+	github.com/knadh/koanf/providers/structs v0.1.0 // indirect
+	github.com/knadh/koanf/v2 v2.1.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/muesli/termenv v0.15.2 // indirect
+	github.com/pelletier/go-toml v1.9.5 // 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.sum

@@ -1,3 +1,5 @@
+github.com/alecthomas/kong v0.9.0 h1:G5diXxc85KvoV2f0ZRVuMsi45IrBgx9zDNGNj165aPA=
+github.com/alecthomas/kong v0.9.0/go.mod h1:Y47y5gKfHp1hDc7CH7OeXgLIpp+Q2m1Ni0L5s3bI8Os=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
 github.com/carlmjohnson/requests v0.23.5 h1:NPANcAofwwSuC6SIMwlgmHry2V3pLrSqRiSBKYbNHHA=
@@ -13,6 +15,22 @@ github.com/containerd/console v1.0.4/go.mod h1:YynlIjWYF8myEu6sdkwKIvGQq+cOckRm6
 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=
+github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
+github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
+github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
+github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1 h1:TQcrn6Wq+sKGkpyPvppOz99zsMBaUOKXq6HSv655U1c=
+github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/knadh/koanf/maps v0.1.1 h1:G5TjmUh2D7G2YWf5SQQqSiHRJEjaicvU0KpypqB3NIs=
+github.com/knadh/koanf/maps v0.1.1/go.mod h1:npD/QZY3V6ghQDdcQzl1W4ICNVTkohC8E73eI2xW4yI=
+github.com/knadh/koanf/parsers/toml v0.1.0 h1:S2hLqS4TgWZYj4/7mI5m1CQQcWurxUz6ODgOub/6LCI=
+github.com/knadh/koanf/parsers/toml v0.1.0/go.mod h1:yUprhq6eo3GbyVXFFMdbfZSo928ksS+uo0FFqNMnO18=
+github.com/knadh/koanf/providers/file v0.1.0 h1:fs6U7nrV58d3CFAFh8VTde8TM262ObYf3ODrc//Lp+c=
+github.com/knadh/koanf/providers/file v0.1.0/go.mod h1:rjJ/nHQl64iYCtAW2QQnF0eSmDEX/YZ/eNFj5yR6BvA=
+github.com/knadh/koanf/providers/structs v0.1.0 h1:wJRteCNn1qvLtE5h8KQBvLJovidSdntfdyIbbCzEyE0=
+github.com/knadh/koanf/providers/structs v0.1.0/go.mod h1:sw2YZ3txUcqA3Z27gPlmmBzWn1h8Nt9O6EP/91MkcWE=
+github.com/knadh/koanf/v2 v2.1.0 h1:eh4QmHHBuU8BybfIJ8mB8K8gsGCD/AUQTdwGq/GzId8=
+github.com/knadh/koanf/v2 v2.1.0/go.mod h1:4mnTRbZCK+ALuBXHZMjDfG9y714L7TykVnZkXbMU3Es=
 github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
@@ -22,6 +40,10 @@ github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+Ei
 github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mitchellh/copystructure v1.2.0 h1:vpKXTN4ewci03Vljg/q9QvCGUDttBOGBIa15WveJJGw=
+github.com/mitchellh/copystructure v1.2.0/go.mod h1:qLl+cE2AmVv+CoeAwDPye/v+N2HKCj9FbZEVFJRxO9s=
+github.com/mitchellh/reflectwalk v1.0.2 h1:G2LzWKi524PWgd3mLHV8Y5k7s6XUvT0Gef6zxSIeXaQ=
+github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
 github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
@@ -30,6 +52,8 @@ github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
 github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKtnHY/8=
 github.com/muesli/termenv v0.15.2 h1:GohcuySI0QmI3wN8Ok9PtKGkgkFIk7y6Vpb5PvrY+Wo=
 github.com/muesli/termenv v0.15.2/go.mod h1:Epx+iuz8sNs7mNKhxzH4fWXGNpZwUaJKRS1noLXviQ8=
+github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
+github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=

moon/moon.go

@@ -2,31 +2,36 @@ package moon
 
 import (
 	"context"
+	"fmt"
 	"math"
 	"time"
 
-	"code.humancabbage.net/moonmath/coindesk"
+	"code.humancabbage.net/sam/moonmath/coindesk"
 	"github.com/sourcegraph/conc/pool"
 )
 
 type Math struct {
+	Asset        coindesk.Asset
 	CurrentPrice coindesk.Price
 	Columns      []Column
-	Goals        []float64
+	Goals        []Goal
+	Labels       []string
 }
 
-func NewMath(goals []float64, bases []Base) (m Math) {
+func NewMath(asset coindesk.Asset, goals []Goal, bases []Base) (m Math) {
-	if goals == nil {
+	if goals == nil || bases == nil {
-		goals = DefaultGoals
+		panic("goals and bases must be set")
-	}
-	if bases == nil {
-		bases = DefaultBases
 	}
+	m.Asset = asset
 	m.Goals = goals
+	m.Labels = []string{"Starting", "CDPR"}
 	m.Columns = make([]Column, len(bases))
 	for i := range bases {
 		m.Columns[i].Base = bases[i]
 	}
+	for i := range goals {
+		m.Labels = append(m.Labels, goals[i].Name)
+	}
 	return
 }
 
@@ -43,7 +48,7 @@ type Projection struct {
 }
 
 func ProjectDates(
-	from time.Time, currentPrice float64, cdpr float64, goals []float64,
+	from time.Time, currentPrice float64, cdpr float64, goals []Goal,
 ) (p Projection) {
 	if cdpr <= 0 {
 		return
@@ -51,7 +56,7 @@ func ProjectDates(
 	logP := math.Log(currentPrice)
 	logR := math.Log(cdpr)
 	for _, goal := range goals {
-		daysToGo := (math.Log(goal) - logP) / logR
+		daysToGo := (math.Log(goal.Value) - logP) / logR
 		date := from.Add(time.Hour * 24 * time.Duration(daysToGo))
 		p.Dates = append(p.Dates, date)
 	}
@@ -60,11 +65,11 @@ func ProjectDates(
 }
 
 func (m *Math) Refresh(ctx context.Context) (err error) {
-	resp, err := coindesk.GetAssetTickers(ctx, coindesk.BTC)
+	resp, err := coindesk.GetAssetTickers(ctx, m.Asset)
 	if err != nil {
 		return
 	}
-	m.CurrentPrice = resp.Data[coindesk.BTC].OHLC.Closing
+	m.CurrentPrice = resp.Data[m.Asset].OHLC.Closing
 
 	tasks := pool.New().WithErrors()
 	tasks.WithMaxGoroutines(len(m.Columns))
@@ -77,7 +82,7 @@ func (m *Math) Refresh(ctx context.Context) (err error) {
 			c.StartingDate = c.Base.From(now)
 			nextDay := c.StartingDate.Add(time.Hour * 24)
 			resp, err := coindesk.GetPriceValues(ctx,
-				coindesk.BTC, c.StartingDate, nextDay)
+				m.Asset, c.StartingDate, nextDay)
 			if err != nil {
 				return err
 			}
@@ -86,7 +91,10 @@ func (m *Math) Refresh(ctx context.Context) (err error) {
 			days := now.Sub(c.StartingDate).Hours() / 24
 			c.CDPR = CDPR(days, c.Gain)
 			if c.CDPR > 1 {
-				c.Projections = ProjectDates(now, float64(m.CurrentPrice), c.CDPR, m.Goals)
+				c.Projections = ProjectDates(
+					now, float64(m.CurrentPrice),
+					c.CDPR, m.Goals,
+				)
 			} else {
 				c.Projections.Dates = nil
 			}
@@ -107,58 +115,85 @@ type Column struct {
 	Projections   Projection
 }
 
-var DefaultGoals = []float64{
+func (c *Column) Column() (entries []string) {
-	100000,
+	entries = append(entries, fmt.Sprintf("$%.2f", c.StartingPrice))
-	150000,
+	entries = append(entries, fmt.Sprintf("%.2f%%", (c.CDPR-1)*100))
-	200000,
+	never := c.CDPR <= 1
-	250000,
+	for i := range c.Projections.Dates {
-	300000,
+		var cell string
-	500000,
+		if never {
-	1000000,
+			cell = "NEVER!!!!!"
+		} else {
+			cell = c.
+				Projections.
+				Dates[i].
+				Format("2006-01-02")
+		}
+		entries = append(entries, cell)
+	}
+	return
 }
 
-var DefaultBases = []Base{
+var DefaultGoals = []Goal{
-	RelativeBase{"Month", time.Duration(-30) * time.Hour * 24},
+	{"$100k", 100000},
-	RelativeBase{"Quarter", time.Duration(-90) * time.Hour * 24},
+	{"$150k", 150000},
-	RelativeBase{"Half-Year", time.Duration(-182) * time.Hour * 24},
+	{"$200k", 200000},
-	RelativeBase{"Year", time.Duration(-365) * time.Hour * 24},
+	{"$250k", 250000},
-	ConstantBase{"2020-", time.Unix(1577836800, 0)},
+	{"$300k", 300000},
-	ConstantBase{"2019-", time.Unix(1546300800, 0)},
+	{"$500k", 500000},
-	ConstantBase{"2018-", time.Unix(1514764800, 0)},
+	{"$1m", 1000000},
-	ConstantBase{"2017-", time.Unix(1483228800, 0)},
+}
+
+var DefaultConstantBases = []ConstantBase{
+	{"2020-", time.Unix(1577836800, 0)},
+	{"2019-", time.Unix(1546300800, 0)},
+	{"2018-", time.Unix(1514764800, 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},
+}
+
+type Goal struct {
+	Name  string  `koanf:"name"`
+	Value float64 `koanf:"value"`
 }
 
 // Base is a temporal point of comparison used for price projection.
 type Base interface {
 	From(now time.Time) time.Time
-	Name() string
+	Label() string
 }
 
 // ConstantBase is a base that is a constant time, e.g. 2020-01-01.
 type ConstantBase struct {
-	name string
+	Name string    `koanf:"name"`
-	time time.Time
+	Time time.Time `koanf:"time"`
 }
 
 func (cb ConstantBase) From(_ time.Time) time.Time {
-	return cb.time
+	return cb.Time
 }
 
-func (cb ConstantBase) Name() string {
+func (cb ConstantBase) Label() string {
-	return cb.name
+	return cb.Name
 }
 
 // RelativeBase is a base that is relative, e.g. "90 days ago."
 type RelativeBase struct {
-	name   string
+	Name   string        `koanf:"name"`
-	offset time.Duration
+	Offset time.Duration `koanf:"offset"`
 }
 
 func (rb RelativeBase) From(now time.Time) time.Time {
-	then := now.Add(time.Duration(rb.offset))
+	then := now.Add(time.Duration(rb.Offset))
 	return then
 }
 
-func (rb RelativeBase) Name() string {
+func (rb RelativeBase) Label() string {
-	return rb.name
+	return rb.Name
 }

moon/moon_test.go

@@ -4,20 +4,13 @@ import (
 	"testing"
 	"time"
 
-	"code.humancabbage.net/moonmath/moon"
+	"code.humancabbage.net/sam/moonmath/moon"
 )
 
 func TestCDPR(t *testing.T) {
 }
 
 func TestProjection(t *testing.T) {
-	p := moon.ProjectDates(time.Now(), 68900, 1.0055, []float64{
+	p := moon.ProjectDates(time.Now(), 68900, 1.0055, moon.DefaultGoals)
-		100000,
-		150000,
-		200000,
-		250000,
-		300000,
-		350000,
-	})
 	_ = p
 }

moonmath.go

@@ -1,147 +1,35 @@
 package main
 
 import (
-	"context"
 	"fmt"
 	"os"
-	"time"
 
-	"code.humancabbage.net/moonmath/moon"
+	"code.humancabbage.net/sam/moonmath/config"
-	"github.com/charmbracelet/bubbles/table"
+	"code.humancabbage.net/sam/moonmath/tui"
+	"github.com/alecthomas/kong"
 	tea "github.com/charmbracelet/bubbletea"
-	"github.com/charmbracelet/lipgloss"
 )
 
-var baseStyle = lipgloss.NewStyle().
+var CLI struct {
-	BorderStyle(lipgloss.NormalBorder()).
+	ConfigFile string `help:"Path to TOML configuration file."`
-	BorderForeground(lipgloss.Color("240"))
-
-type model struct {
-	math moon.Math
-
-	prices      table.Model
-	projections table.Model
-}
-
-func (m model) Init() tea.Cmd {
-	return func() tea.Msg {
-		_ = m.math.Refresh(context.TODO())
-		return m.math
-	}
-}
-
-func initialModel() model {
-	math := moon.NewMath(nil, nil)
-
-	tableStyle := table.DefaultStyles()
-	tableStyle.Selected = lipgloss.NewStyle()
-	prices := table.New(
-		table.WithColumns([]table.Column{
-			{Title: "Price", Width: 9},
-		}),
-		table.WithHeight(1),
-		table.WithStyles(tableStyle),
-	)
-
-	projectionCols := []table.Column{
-		{Title: "Labels", Width: 8},
-	}
-	for i := range math.Columns {
-		projectionCols = append(projectionCols, table.Column{
-			Title: math.Columns[i].Base.Name(),
-			Width: 10,
-		})
-	}
-	projectionRows := make([]table.Row, len(math.Goals)+2)
-	for i := range projectionRows {
-		projectionRows[i] = make(table.Row, len(projectionCols))
-	}
-	projectionRows[0][0] = "Starting"
-	projectionRows[1][0] = "CDPR"
-	for i := range math.Goals {
-		projectionRows[i+2][0] = fmt.Sprintf("$%.0f", math.Goals[i])
-	}
-	projections := table.New(
-		table.WithColumns(projectionCols),
-		table.WithRows(projectionRows),
-		table.WithHeight(len(math.Goals)+2),
-		table.WithStyles(tableStyle),
-	)
-
-	return model{
-		math:        math,
-		prices:      prices,
-		projections: projections,
-	}
-}
-
-func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
-	switch msg := msg.(type) {
-	case moon.Math:
-		m.math = msg
-		refillPrice(&m)
-		refillProjections(&m)
-		return m, tea.Tick(time.Second*30, func(t time.Time) tea.Msg {
-			_ = m.math.Refresh(context.TODO())
-			return m.math
-		})
-	case tea.KeyMsg:
-		switch msg.String() {
-		case "ctrl+c", "q", "esc":
-			return m, tea.Quit
-		}
-	}
-	return m, nil
-}
-
-func refillPrice(m *model) {
-	rows := []table.Row{
-		[]string{fmt.Sprintf("$%0.2f", m.math.CurrentPrice)},
-	}
-	m.prices.SetRows(rows)
-}
-
-func refillProjections(m *model) {
-	rows := m.projections.Rows()
-
-	for col := range m.math.Columns {
-		_ = col
-		never := false
-		if m.math.Columns[col].CDPR <= 1 {
-			never = true
-		}
-
-		rows[0][col+1] = fmt.Sprintf("$%.2f", m.math.Columns[col].StartingPrice)
-		rows[1][col+1] = fmt.Sprintf("%.2f%%", (m.math.Columns[col].CDPR-1)*100)
-		for row := 0; row < len(m.math.Goals); row++ {
-			var cell string
-			if never {
-				cell = "NEVER!!!!!"
-			} else {
-				cell = m.math.Columns[col].
-					Projections.Dates[row].
-					Format("2006-01-02")
-			}
-			rows[row+2][col+1] = cell
-		}
-	}
-	m.projections.SetRows(rows)
-}
-
-func (m model) View() string {
-	var s string
-	s += lipgloss.JoinHorizontal(
-		lipgloss.Top,
-		baseStyle.Render(m.prices.View()),
-		baseStyle.Render(m.projections.View()),
-	)
-	return s + "\n"
 }
 
 func main() {
-	p := tea.NewProgram(initialModel())
+	ctx := kong.Parse(&CLI)
+	if ctx.Error != nil {
+		fail(ctx.Error)
+	}
+	cfg, err := config.Load(CLI.ConfigFile)
+	if err != nil {
+		fail(err)
+	}
+	p := tea.NewProgram(tui.New(cfg))
 	if _, err := p.Run(); err != nil {
-		fmt.Printf("program error: %v\n", err)
+		fail(err)
-		os.Exit(1)
 	}
 }
+
+func fail(err error) {
+	fmt.Printf("program error: %v\n", err)
+	os.Exit(1)
+}

tui/tui.go

@@ -0,0 +1,168 @@
+package tui
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"code.humancabbage.net/sam/moonmath/config"
+	"code.humancabbage.net/sam/moonmath/moon"
+	"github.com/charmbracelet/bubbles/spinner"
+	"github.com/charmbracelet/bubbles/table"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+type Model struct {
+	math moon.Math
+
+	reloading bool
+	indicator spinner.Model
+
+	prices      table.Model
+	projections table.Model
+}
+
+func New(cfg config.Data) Model {
+	math := moon.NewMath(
+		cfg.Asset,
+		cfg.Goals,
+		config.GetBases(&cfg))
+
+	tableStyle := table.DefaultStyles()
+	tableStyle.Selected = lipgloss.NewStyle()
+	prices := table.New(
+		table.WithColumns([]table.Column{
+			{Title: "Asset", Width: 6},
+			{Title: "Price", Width: 9},
+		}),
+		table.WithHeight(1),
+		table.WithStyles(tableStyle),
+	)
+
+	projectionCols := []table.Column{
+		{Title: "Labels", Width: 8},
+	}
+	for i := range math.Columns {
+		projectionCols = append(projectionCols,
+			table.Column{
+				Title: math.Columns[i].Base.Label(),
+				Width: 10,
+			})
+	}
+	projections := table.New(
+		table.WithColumns(projectionCols),
+		table.WithHeight(len(math.Labels)),
+		table.WithStyles(tableStyle),
+	)
+
+	indicator := spinner.New()
+	indicator.Spinner = spinner.Points
+	indicator.Style = lipgloss.NewStyle().
+		Foreground(lipgloss.Color("69"))
+
+	return Model{
+		math:        math,
+		indicator:   indicator,
+		prices:      prices,
+		projections: projections,
+	}
+}
+
+func (m Model) Init() tea.Cmd {
+	return tea.Batch(
+		m.indicator.Tick,
+		func() tea.Msg {
+			return refresh{}
+		},
+	)
+}
+
+func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case refresh:
+		m.reloading = true
+		return m, func() tea.Msg {
+			_ = m.math.Refresh(context.TODO())
+			return m.math
+		}
+	case moon.Math:
+		m.math = msg
+		m.reloading = false
+		refillPrice(&m)
+		refillProjections(&m)
+		return m, tea.Tick(time.Second*30,
+			func(t time.Time) tea.Msg {
+				return refresh{}
+			})
+	case spinner.TickMsg:
+		var cmd tea.Cmd
+		m.indicator, cmd = m.indicator.Update(msg)
+		return m, cmd
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "ctrl+c", "q", "esc":
+			return m, tea.Quit
+		}
+	}
+	return m, nil
+}
+
+type refresh struct{}
+
+func refillPrice(m *Model) {
+	rows := []table.Row{
+		[]string{
+			string(m.math.Asset),
+			fmt.Sprintf("$%0.2f", m.math.CurrentPrice),
+		},
+	}
+	m.prices.SetRows(rows)
+}
+
+func refillProjections(m *Model) {
+	rows := []table.Row{m.math.Labels}
+	for i := range m.math.Columns {
+		rows = append(rows, m.math.Columns[i].Column())
+	}
+	rows = transpose(rows)
+	m.projections.SetRows(rows)
+}
+
+func transpose(slice []table.Row) []table.Row {
+	xl := len(slice[0])
+	yl := len(slice)
+	result := make([]table.Row, xl)
+	for i := range result {
+		result[i] = make(table.Row, yl)
+	}
+	for i := 0; i < xl; i++ {
+		for j := 0; j < yl; j++ {
+			result[i][j] = slice[j][i]
+		}
+	}
+	return result
+}
+
+func (m Model) View() string {
+	var s string
+	indicator := ""
+	if m.reloading {
+		indicator = m.indicator.View()
+	}
+	right := lipgloss.JoinVertical(
+		lipgloss.Center,
+		baseStyle.Render(m.prices.View()),
+		indicator,
+	)
+	s += lipgloss.JoinHorizontal(
+		lipgloss.Top,
+		right,
+		baseStyle.Render(m.projections.View()),
+	)
+	return s + "\n"
+}
+
+var baseStyle = lipgloss.NewStyle().
+	BorderStyle(lipgloss.NormalBorder()).
+	BorderForeground(lipgloss.Color("240"))