Add command-line client

cmd/ofx/main.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+var commands = []Command{
+	getAccountsCommand,
+	downloadCommand,
+	ccDownloadCommand,
+	invDownloadCommand,
+	bankTransactionsCommand,
+	ccTransactionsCommand,
+	invTransactionsCommand,
+}
+
+func usage() {
+	fmt.Println(`The ofxgo command-line client provides a simple interface to
+query, parse, and display financial data via the OFX specification.
+
+Usage:
+	ofx command [arguments]
+
+The commands are:`)
+
+	maxlen := 0
+	for _, cmd := range commands {
+		if len(cmd.Name) > maxlen {
+			maxlen = len(cmd.Name)
+		}
+	}
+	formatString := "    %-" + strconv.Itoa(maxlen) + "s    %s\n"
+
+	for _, cmd := range commands {
+		fmt.Printf(formatString, cmd.Name, cmd.Description)
+	}
+}
+
+func runCmd(c *Command) {
+	err := c.Flags.Parse(os.Args[2:])
+	if err != nil {
+		fmt.Printf("Error parsing flags: %s\n", err)
+		c.Usage()
+		os.Exit(1)
+	}
+
+	if !c.CheckFlags() {
+		fmt.Println()
+		c.Usage()
+		os.Exit(1)
+	}
+
+	c.Do()
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("Error: Please supply a sub-command. Usage:\n")
+		usage()
+		os.Exit(1)
+	}
+	cmdName := os.Args[1]
+	for _, cmd := range commands {
+		if cmd.Name == cmdName {
+			runCmd(&cmd)
+			os.Exit(0)
+		}
+	}
+
+	switch cmdName {
+	case "-h", "-help", "--help", "help":
+		usage()
+	default:
+		fmt.Println("Error: Invalid sub-command. Usage:")
+		usage()
+		os.Exit(1)
+	}
+}