Update Dockerfile

Adding Docker support

Dockerfile

@@ -0,0 +1,9 @@
+FROM golang:alpine
+
+RUN apk update && apk add --no-cache git
+RUN git clone https://github.com/mop-tracker/mop ./mop
+RUN cd mop && \
+    go build ./cmd/mop && \
+    chmod a+x ./mop
+WORKDIR /go/mop/
+CMD ["./mop"]

README.md

@@ -3,21 +3,7 @@ A command-line utility that displays continuous up-to-date information about sel
 
 ![image](https://user-images.githubusercontent.com/12674437/144474220-5f35f893-6860-4ba5-9c3a-58b80df16255.png)
 
-### Downloading mop
-
-<!-- #### ready-to-use program
-
-```
-https://github.com/mop-tracker/mop/releases/download/v1.0.0/mop.exe
-```
--->
-#### source code
-
-```
-https://github.com/mop-tracker/mop/releases/tag/v1.0.0
-```
-
-#### Installing mop from source
+### Installing mop from source
 
 Ensure GO language is installed. Download from: https://go.dev/dl/ and the $GOPATH is set then:
 

cnn_market.go

@@ -1,187 +0,0 @@
-// Copyright (c) 2013-2019 by Michael Dvorkin and contributors. All Rights Reserved.
-// Use of this source code is governed by a MIT-style license that can
-// be found in the LICENSE file.
-
-package mop
-
-import (
-	`bytes`
-	`fmt`
-	`io/ioutil`
-	`net/http`
-	`regexp`
-	`strings`
-)
-
-const marketURL = `https://money.cnn.com/data/markets/`
-
-// Market stores current market information displayed in the top three lines of
-// the screen. The market data is fetched and parsed from the HTML page above.
-type Market struct {
-	IsClosed  bool              // True when U.S. markets are closed.
-	Dow       map[string]string // Hash of Dow Jones indicators.
-	Nasdaq    map[string]string // Hash of NASDAQ indicators.
-	Sp500     map[string]string // Hash of S&P 500 indicators.
-	Tokyo     map[string]string
-	HongKong  map[string]string
-	London    map[string]string
-	Frankfurt map[string]string
-	Yield     map[string]string
-	Oil       map[string]string
-	Yen       map[string]string
-	Euro      map[string]string
-	Gold      map[string]string
-	regex     *regexp.Regexp // Regex to parse market data from HTML.
-	errors    string         // Error(s), if any.
-}
-
-// Returns new initialized Market struct.
-func NewMarket() *Market {
-	market := &Market{}
-	market.IsClosed = false
-	market.Dow = make(map[string]string)
-	market.Nasdaq = make(map[string]string)
-	market.Sp500 = make(map[string]string)
-
-	market.Tokyo = make(map[string]string)
-	market.HongKong = make(map[string]string)
-	market.London = make(map[string]string)
-	market.Frankfurt = make(map[string]string)
-
-	market.Yield = make(map[string]string)
-	market.Oil = make(map[string]string)
-	market.Yen = make(map[string]string)
-	market.Euro = make(map[string]string)
-	market.Gold = make(map[string]string)
-
-	market.errors = ``
-
-	const any = `\s*(?:.+?)`
-	const change = `>([\+\-]?[\d\.,]+)<\/span>`
-	const price = `>([\d\.,]+)<\/span>`
-	const percent = `>([\+\-]?[\d\.,]+%?)<`
-
-	rules := []string{
-		`>Dow<`, any, percent, any, price, any, change, any,
-		`>Nasdaq<`, any, percent, any, price, any, change, any,
-		`">S&P<`, any, percent, any, price, any, change, any,
-		`>10\-year yield<`, any, price, any, percent, any,
-		`>Oil<`, any, price, any, percent, any,
-		`>Yen<`, any, price, any, percent, any,
-		`>Euro<`, any, price, any, percent, any,
-		`>Gold<`, any, price, any, percent, any,
-		`>Nikkei 225<`, any, percent, any, price, any, change, any,
-		`>Hang Seng<`, any, percent, any, price, any, change, any,
-		`>FTSE 100<`, any, percent, any, price, any, change, any,
-		`>DAX<`, any, percent, any, price, any, change, any,
-	}
-
-	market.regex = regexp.MustCompile(strings.Join(rules, ``))
-
-	return market
-}
-
-// Fetch downloads HTML page from the 'marketURL', parses it, and stores resulting data
-// in internal hashes. If download or data parsing fails Fetch populates 'market.errors'.
-func (market *Market) Fetch() (self *Market) {
-	self = market // <-- This ensures we return correct market after recover() from panic().
-	defer func() {
-		if err := recover(); err != nil {
-			market.errors = fmt.Sprintf("Error fetching market data...\n%s", err)
-		} else {
-			market.errors = ""
-		}
-	}()
-
-	response, err := http.Get(marketURL)
-	if err != nil {
-		panic(err)
-	}
-
-	defer response.Body.Close()
-	body, err := ioutil.ReadAll(response.Body)
-	if err != nil {
-		panic(err)
-	}
-
-	body = market.isMarketOpen(body)
-	return market.extract(market.trim(body))
-}
-
-// Ok returns two values: 1) boolean indicating whether the error has occurred,
-// and 2) the error text itself.
-func (market *Market) Ok() (bool, string) {
-	return market.errors == ``, market.errors
-}
-
-//-----------------------------------------------------------------------------
-func (market *Market) isMarketOpen(body []byte) []byte {
-	// TBD -- CNN page doesn't seem to have market open/close indicator.
-	return body
-}
-
-//-----------------------------------------------------------------------------
-func (market *Market) trim(body []byte) []byte {
-	start := bytes.Index(body, []byte(`Markets Overview`))
-	finish := bytes.LastIndex(body, []byte(`Gainers`))
-	snippet := bytes.Replace(body[start:finish], []byte{'\n'}, []byte{}, -1)
-	snippet = bytes.Replace(snippet, []byte(`&amp;`), []byte{'&'}, -1)
-
-	return snippet
-}
-
-//-----------------------------------------------------------------------------
-func (market *Market) extract(snippet []byte) *Market {
-	matches := market.regex.FindStringSubmatch(string(snippet))
-
-	if len(matches) < 31 {
-		panic(`Unable to parse ` + marketURL)
-	}
-
-	market.Dow[`change`] = matches[1]
-	market.Dow[`latest`] = matches[2]
-	market.Dow[`percent`] = matches[3]
-
-	market.Nasdaq[`change`] = matches[4]
-	market.Nasdaq[`latest`] = matches[5]
-	market.Nasdaq[`percent`] = matches[6]
-
-	market.Sp500[`change`] = matches[7]
-	market.Sp500[`latest`] = matches[8]
-	market.Sp500[`percent`] = matches[9]
-
-
-	market.Yield[`name`] = `10-year Yield`
-	market.Yield[`latest`] = matches[10]
-	market.Yield[`change`] = matches[11]
-
-	market.Oil[`latest`] = matches[12]
-	market.Oil[`change`] = matches[13] + `%`
-
-	market.Yen[`latest`] = matches[14]
-	market.Yen[`change`] = matches[15] + `%`
-
-	market.Euro[`latest`] = matches[16]
-	market.Euro[`change`] = matches[17] + `%`
-
-	market.Gold[`latest`] = matches[18]
-	market.Gold[`change`] = matches[19] + `%`
-
-	market.Tokyo[`change`] = matches[20]
-	market.Tokyo[`latest`] = matches[21]
-	market.Tokyo[`percent`] = matches[22]
-
-	market.HongKong[`change`] = matches[23]
-	market.HongKong[`latest`] = matches[24]
-	market.HongKong[`percent`] = matches[25]
-
-	market.London[`change`] = matches[26]
-	market.London[`latest`] = matches[27]
-	market.London[`percent`] = matches[28]
-
-	market.Frankfurt[`change`] = matches[29]
-	market.Frankfurt[`latest`] = matches[30]
-	market.Frankfurt[`percent`] = matches[31]
-
-	return market
-}

yahoo_market.go

@@ -0,0 +1,139 @@
+// Copyright (c) 2013-2019 by Michael Dvorkin and contributors. All Rights Reserved.
+// Use of this source code is governed by a MIT-style license that can
+// be found in the LICENSE file.
+
+package mop
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"encoding/json"
+)
+
+const marketURL = `https://query1.finance.yahoo.com/v7/finance/quote?symbols=%s`
+const marketURLQueryParts = `&range=1d&interval=5m&indicators=close&includeTimestamps=false&includePrePost=false&corsDomain=finance.yahoo.com&.tsrc=finance`
+
+// Market stores current market information displayed in the top three lines of
+// the screen. The market data is fetched and parsed from the HTML page above.
+type Market struct {
+	IsClosed  bool              // True when U.S. markets are closed.
+	Dow       map[string]string // Hash of Dow Jones indicators.
+	Nasdaq    map[string]string // Hash of NASDAQ indicators.
+	Sp500     map[string]string // Hash of S&P 500 indicators.
+	Tokyo     map[string]string
+	HongKong  map[string]string
+	London    map[string]string
+	Frankfurt map[string]string
+	Yield     map[string]string
+	Oil       map[string]string
+	Yen       map[string]string
+	Euro      map[string]string
+	Gold      map[string]string
+	errors    string // Error(s), if any.
+	url       string // URL with symbols to fetch data
+}
+
+// Returns new initialized Market struct.
+func NewMarket() *Market {
+	market := &Market{}
+	market.IsClosed = false
+	market.Dow = make(map[string]string)
+	market.Nasdaq = make(map[string]string)
+	market.Sp500 = make(map[string]string)
+
+	market.Tokyo = make(map[string]string)
+	market.HongKong = make(map[string]string)
+	market.London = make(map[string]string)
+	market.Frankfurt = make(map[string]string)
+
+	market.Yield = make(map[string]string)
+	market.Oil = make(map[string]string)
+	market.Yen = make(map[string]string)
+	market.Euro = make(map[string]string)
+	market.Gold = make(map[string]string)
+
+	market.url = fmt.Sprintf(marketURL, `^DJI,^IXIC,^GSPC,^N225,^HSI,^FTSE,^GDAXI,^TNX,CL=F,JPY=X,EUR=X,GC=F`) + marketURLQueryParts
+
+	market.errors = ``
+
+	return market
+}
+
+// Fetch downloads HTML page from the 'marketURL', parses it, and stores resulting data
+// in internal hashes. If download or data parsing fails Fetch populates 'market.errors'.
+func (market *Market) Fetch() (self *Market) {
+	self = market // <-- This ensures we return correct market after recover() from panic().
+	defer func() {
+		if err := recover(); err != nil {
+			market.errors = fmt.Sprintf("Error fetching market data...\n%s", err)
+		} else {
+			market.errors = ""
+		}
+	}()
+
+	response, err := http.Get(market.url)
+	if err != nil {
+		panic(err)
+	}
+
+	defer response.Body.Close()
+	body, err := ioutil.ReadAll(response.Body)
+	if err != nil {
+		panic(err)
+	}
+
+	body = market.isMarketOpen(body)
+	return market.extract(body)
+}
+
+// Ok returns two values: 1) boolean indicating whether the error has occurred,
+// and 2) the error text itself.
+func (market *Market) Ok() (bool, string) {
+	return market.errors == ``, market.errors
+}
+
+// -----------------------------------------------------------------------------
+func (market *Market) isMarketOpen(body []byte) []byte {
+	// TBD -- CNN page doesn't seem to have market open/close indicator.
+	return body
+}
+
+// -----------------------------------------------------------------------------
+func assign(results []map[string]interface{}, position int, changeAsPercent bool) map[string]string {
+    out := make(map[string]string)
+	out[`change`] = float2Str(results[position]["regularMarketChange"].(float64))
+        out[`latest`] = float2Str(results[position]["regularMarketPrice"].(float64))
+    if changeAsPercent{
+        out[`change`] = float2Str(results[position]["regularMarketChangePercent"].(float64)) + `%`
+    } else { 
+        out[`percent`] = float2Str(results[position]["regularMarketChangePercent"].(float64))
+    }
+    return out
+}
+
+// -----------------------------------------------------------------------------
+func (market *Market) extract(body []byte) *Market {
+    d := map[string]map[string][]map[string]interface{}{}
+    err := json.Unmarshal(body, &d)
+    if err != nil {
+        panic(err)
+    }
+    results := d["quoteResponse"]["result"]
+    market.Dow = assign(results, 0, false)
+    market.Nasdaq = assign(results, 1, false)
+    market.Sp500 = assign(results, 2, false)
+    market.Tokyo = assign(results, 3, false)
+    market.HongKong = assign(results, 4, false)
+    market.London = assign(results, 5, false)
+    market.Frankfurt = assign(results, 6, false)
+    market.Yield[`name`] = `10-year Yield`
+    market.Yield = assign(results, 7, false)
+
+    market.Oil = assign(results, 8, true)
+    market.Yen = assign(results, 9, true)
+    market.Euro = assign(results, 10, true)
+    market.Gold = assign(results, 11, true)
+
+    return market
+}