main.go

package main

import (
	"flag"
	"fmt"
	"os"

	"github.com/rursache/reddit-cli/client"
	"github.com/rursache/reddit-cli/parser"
)

var version = "dev"

func main() {
	jsonOutput := flag.Bool("json", false, "Output as JSON instead of plain text")
	showVersion := flag.Bool("version", false, "Show version and exit")
	flag.Bool("v", false, "Show version and exit (shorthand)")

	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, `reddit-cli - Extract content from Reddit posts

A CLI tool that parses Reddit post URLs and extracts text, links, and images.
Designed for AI agents to read Reddit posts without a browser.

USAGE:
  reddit-cli [flags] <reddit-post-url>

ARGUMENTS:
  <reddit-post-url>    Full URL to a Reddit post
                       Supports: reddit.com, old.reddit.com, new.reddit.com

FLAGS:
  --json               Output as JSON instead of plain text
  --version, -v        Show version and exit
  -h, --help           Show this help message

EXAMPLES:
  reddit-cli https://www.reddit.com/r/golang/comments/abc123/some_post/
  reddit-cli --json https://old.reddit.com/r/linux/comments/xyz789/some_post/
  reddit-cli https://reddit.com/r/pics/comments/def456/cool_photo/ | head -5

SUPPORTED POST TYPES:
  - Text posts (self posts with body text)
  - Link posts (external URLs)
  - Image posts (single images, i.redd.it)
  - Gallery posts (multiple images)
  - Video posts (Reddit-hosted videos)
  - Embedded content (YouTube, etc.)
  - Crossposts (extracts original content)

OUTPUT:
  By default, outputs clean plain text to stdout.
  Use --json for structured JSON output.
  Exit code 0 on success, 1 on error.

NOTE:
  No API key or authentication required.
  Uses Reddit's public JSON API (appending .json to post URLs).
`)
	}

	flag.Parse()

	if *showVersion || isFlagSet("v") {
		fmt.Printf("reddit-cli %s\n", version)
		os.Exit(0)
	}

	args := flag.Args()
	if len(args) == 0 {
		fmt.Fprintln(os.Stderr, "error: no URL provided")
		fmt.Fprintln(os.Stderr, "usage: reddit-cli [flags] <reddit-post-url>")
		fmt.Fprintln(os.Stderr, "run 'reddit-cli -h' for help")
		os.Exit(1)
	}

	rawURL := args[0]

	post, err := client.FetchPost(rawURL)
	if err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}

	parsed := parser.Parse(post)

	if *jsonOutput {
		output, err := parser.FormatJSON(parsed)
		if err != nil {
			fmt.Fprintf(os.Stderr, "error: %v\n", err)
			os.Exit(1)
		}
		fmt.Println(output)
	} else {
		fmt.Print(parser.FormatText(parsed))
	}
}

func isFlagSet(name string) bool {
	found := false
	flag.Visit(func(f *flag.Flag) {
		if f.Name == name {
			found = true
		}
	})
	return found
}