Adds write command.

README.md

@@ -6,9 +6,13 @@
 # :zap: qtrn :zap:
 The official cli tool for making financial markets analysis as fast as you are.
 
+Pronounced "quote-tron" as a throwback to those awesome financial terminals of the 80's. This project is intended as a living example of the capabilities of the [finance-go] library.
+
 ## Commands
 The current available commands are:
 * `quote` - prints tables of quotes to the current shell
+* `options` - prints tables of options contract quotes to the current shell
+* `write` - writes tables of quotes/history to csv files
 
 ## Installation
 In order to use this awesome tool, you'll need to get it on your machine!
@@ -25,7 +29,7 @@ brew install qtrn
 2. Determine the appropriate distribution for your operating system (mac | windows | linux)
 3. Download and untar the distribution. Shortcut for macs:
 ```
-curl -sL https://github.com/piquette/qtrn/releases/download/v0.0.3/qtrn_0.0.3_darwin_amd64.tar.gz | tar zx
+curl -sL https://github.com/piquette/qtrn/releases/download/v0.0.5/qtrn_0.0.5_darwin_amd64.tar.gz | tar zx
 ```
 4. Move the binary into your local `$PATH`.
 5. Run `qtrn help`.
@@ -78,3 +82,4 @@ goreleaser --rm-dist
 
 [goreleaser]: https://github.com/goreleaser/goreleaser
 [releases]: https://github.com/piquette/qtrn/releases
+[finance-go]: https://github.com/piquette/finance-go

cmd/main.go

@@ -21,6 +21,7 @@ import (
 	finance "github.com/piquette/finance-go"
 	"github.com/piquette/qtrn/cmd/options"
 	quote "github.com/piquette/qtrn/cmd/quote"
+	"github.com/piquette/qtrn/cmd/write"
 
 	"github.com/piquette/qtrn/version"
 	"github.com/spf13/cobra"
@@ -57,7 +58,7 @@ func Execute() error {
 	}
 
 	//	cmdQtrn.AddCommand(chartCmd)
-	//	cmdQtrn.AddCommand(writeCmd)
+	c.AddCommand(write.Cmd)
 	c.AddCommand(quote.Cmd)
 	c.AddCommand(options.Cmd)
 	c.PersistentFlags().BoolVarP(&insecureF, "insecure", "x", false, "set `--insecure` or `-x` to skip tls verification during requests")

cmd/write/csv.go

@@ -0,0 +1,41 @@
+package write
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+	"time"
+)
+
+// write writes data to a csv.
+func write(header []string, prefix string, cmd string, data [][]string) error {
+	t := time.Now()
+	now := fmt.Sprintf("%d-%02d-%02d_%02d:%02d:%02d",
+		t.Year(), t.Month(), t.Day(),
+		t.Hour(), t.Minute(), t.Second())
+	fileTitle := fmt.Sprintf("%v_%v_%v.csv", prefix, cmd, now)
+	file, err := os.Create(fileTitle)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	writer := csv.NewWriter(file)
+	defer writer.Flush()
+
+	if !removeHeaderF {
+		err = writer.Write(header)
+		if err != nil {
+			return err
+		}
+	}
+
+	for _, value := range data {
+		err = writer.Write(value)
+		if err != nil {
+			return err
+		}
+	}
+	fmt.Println(fileTitle)
+	return nil
+}