Initial help implementation

dclish/dclish.go

@@ -35,7 +35,6 @@ type Commands map[string]*Command
 func (c Commands) ParseAndRun(line string) error {
 	// TODO: this doesn't handle a DCL command line completely.
 	words := strings.Fields(line)
-	fmt.Printf("TODO ParseAndRun need to parse flags: %s\n", words)
 	cmd, ok := c[strings.ToUpper(words[0])]
 	if !ok {
 		fmt.Printf("ERROR: Unknown command '%s'\n", words[0])
@@ -52,6 +51,7 @@ func (c Commands) ParseAndRun(line string) error {
 	if len(words) == 1 {
 		return cmd.Action(cmd)
 	}
+	// TODO: need to clean this up.
 	for i := range words[1:] {
 		if strings.HasPrefix(words[i], "/") {
 			flag, val, assigned := strings.Cut(words[i], "=")
@@ -63,7 +63,6 @@ func (c Commands) ParseAndRun(line string) error {
 				}
 				flg.Value = val
 			} else {
-				// TODO: handle toggle flag.
 				wordup := strings.ToUpper(words[i])
 				value := "true"
 				if strings.HasPrefix(wordup, "/NO") {
@@ -76,6 +75,8 @@ func (c Commands) ParseAndRun(line string) error {
 				}
 				flg.Value = value
 			}
+		} else {
+			cmd.Args = append(cmd.Args, words[i])
 		}
 	}
 	return cmd.Action(cmd)

repl/help.go

@@ -2,10 +2,27 @@
 package repl
 
 import (
+	"fmt"
+	"strings"
+
 	"git.lyda.ie/kevin/bulletin/dclish"
 )
 
+var helpmap map[string]string
+
 // ActionHelp handles the `HELP` command.
-func ActionHelp(_ *dclish.Command) error {
+func ActionHelp(cmd *dclish.Command) error {
+	if len(cmd.Args) == 0 {
+		fmt.Printf("%s\n", cmd.Description)
+		return nil
+	}
+	wordup := strings.ToUpper(cmd.Args[0])
+	helptext, ok := helpmap[wordup]
+	if !ok {
+		// TODO: add a help structure for topics that are not command.
+		fmt.Printf("ERROR: Topic not found: '%s'.\n", cmd.Args[0])
+		return nil
+	}
+	fmt.Printf("%s\n", helptext)
 	return nil
 }