first commit

.gitignore

@@ -0,0 +1,4 @@
+.vscode
+specs
+personal
+/erol

cmd/erol/main.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/urfave/cli/v2"
+
+	"github.com/bjesus/erol/common"
+	"github.com/bjesus/erol/internal/app"
+	"github.com/bjesus/erol/outputs"
+)
+
+func main() {
+	log.SetFlags(log.Lshortfile | log.Ltime)
+
+	app := &cli.App{
+		Name:  "erol",
+		Usage: "Easy web scraping CLI tool",
+		Flags: []cli.Flag{
+			&cli.BoolFlag{
+				Name:  "json",
+				Usage: "Output as JSON",
+			},
+			&cli.StringSliceFlag{
+				Name:  "separator",
+				Usage: "Separator for text output (can be used multiple times)",
+			},
+			&cli.StringFlag{
+				Name:  "template",
+				Usage: "Path to template file for output",
+			},
+			&cli.IntFlag{
+				Name:  "max-pages",
+				Value: 3,
+				Usage: "Maximum number of pages to scrape",
+			},
+		},
+		Action: func(c *cli.Context) error {
+			if c.NArg() == 0 {
+				return fmt.Errorf("spec argument is required")
+			}
+			spec := c.Args().Get(0)
+			return runErol(c, spec)
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func runErol(c *cli.Context, specFile string) error {
+	jsonOutput := c.Bool("json")
+	separators := c.StringSlice("separator")
+	templateFile := c.String("template")
+	maxPages := c.Int("max-pages")
+
+	erol := &common.ErolApp{
+		MaxPages:  maxPages,
+		Separator: separators,
+	}
+
+	log.Println("Parsing spec file:", specFile)
+	err := app.ParseSpecFile(erol, specFile)
+	if err != nil {
+		return fmt.Errorf("error parsing spec file: %w", err)
+	}
+
+	log.Println("Executing blocks")
+	err = app.ExecuteBlocks(erol)
+	if err != nil {
+		return fmt.Errorf("error executing blocks: %w", err)
+	}
+
+	log.Println("Generating output")
+	if jsonOutput {
+		return outputs.OutputJSON(erol)
+	} else if templateFile != "" {
+		return outputs.OutputTemplate(erol, templateFile)
+	} else {
+		return outputs.OutputText(erol)
+	}
+}

common/common.go

@@ -0,0 +1,15 @@
+package common
+
+type Block struct {
+	Type     string
+	Command  string
+	Queries  []string
+	NextPage string
+}
+
+type ErolApp struct {
+	Blocks    []Block
+	Data      []interface{}
+	MaxPages  int
+	Separator []string
+}

go.mod

@@ -0,0 +1,26 @@
+module github.com/bjesus/erol
+
+go 1.23.0
+
+require (
+	github.com/PuerkitoBio/goquery v1.9.2
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
+	github.com/playwright-community/playwright-go v0.4501.1
+	github.com/tidwall/gjson v1.17.3
+	github.com/urfave/cli/v2 v2.27.4
+)
+
+require (
+	github.com/andybalholm/cascadia v1.3.2 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
+	github.com/deckarep/golang-set/v2 v2.6.0 // indirect
+	github.com/go-jose/go-jose/v3 v3.0.3 // indirect
+	github.com/go-stack/stack v1.8.1 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.1 // indirect
+	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/exp v0.0.0-20240823005443-9b4947da3948 // indirect
+	golang.org/x/net v0.24.0 // indirect
+)

go.sum

@@ -0,0 +1,92 @@
+github.com/PuerkitoBio/goquery v1.9.2 h1:4/wZksC3KgkQw7SQgkKotmKljk0M6V8TUvA8Wb4yPeE=
+github.com/PuerkitoBio/goquery v1.9.2/go.mod h1:GHPCaP0ODyyxqcNoFGYlAprUFH81NuRPd0GX3Zu2Mvk=
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internal/app/app.go

@@ -0,0 +1,132 @@
+package app
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/PuerkitoBio/goquery"
+	"github.com/bjesus/erol/common"
+	"github.com/bjesus/erol/parsers"
+	"github.com/tidwall/gjson"
+)
+
+func ParseSpecFile(e *common.ErolApp, filename string) error {
+	file, err := os.Open(filename)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	var currentBlock *common.Block
+
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		if line == "" {
+			if currentBlock != nil {
+				e.Blocks = append(e.Blocks, *currentBlock)
+				currentBlock = nil
+			}
+			continue
+		}
+
+		if strings.HasPrefix(line, "#") {
+			continue
+		}
+		if currentBlock == nil {
+			if strings.HasPrefix(line, "curl ") {
+				currentBlock = &common.Block{Type: "curl", Command: line}
+			} else if strings.HasPrefix(line, "playwright ") {
+				currentBlock = &common.Block{Type: "playwright", Command: line}
+			} else {
+				return fmt.Errorf("invalid block start: %s", line)
+			}
+		} else {
+			if strings.HasPrefix(line, "> ") {
+
+				currentBlock.NextPage = strings.TrimPrefix(line, "> ")
+			} else {
+				currentBlock.Queries = append(currentBlock.Queries, line)
+			}
+		}
+	}
+
+	log.Println("Found block", currentBlock)
+	if currentBlock != nil {
+		e.Blocks = append(e.Blocks, *currentBlock)
+	}
+
+	return scanner.Err()
+}
+
+func ExecuteBlocks(e *common.ErolApp) error {
+	for _, block := range e.Blocks {
+		var data interface{}
+		var err error
+
+		for page := 0; page < e.MaxPages; page++ {
+			if block.Type == "curl" {
+				data, err = parsers.ExecuteCurlBlock(block)
+			} else if block.Type == "playwright" {
+				data, err = parsers.ExecutePlaywrightBlock(block)
+			}
+
+			if err != nil {
+				return err
+			}
+
+			e.Data = append(e.Data, data)
+
+			if block.NextPage == "" {
+				break
+			}
+
+			nextURL, err := getNextPageURL(block, data)
+			if err != nil {
+				return err
+			}
+
+			block.Command = strings.Replace(block.Command, block.Command[strings.Index(block.Command, " ")+1:], nextURL, 1)
+		}
+	}
+
+	return nil
+}
+
+func getNextPageURL(block common.Block, data interface{}) (string, error) {
+	parts := strings.Split(block.NextPage, "|")
+	selector := strings.TrimSpace(parts[0])
+
+	var nextURL string
+
+	if block.Type == "curl" {
+		if strings.HasPrefix(selector, ".") {
+			// JSON mode
+			nextURL = gjson.Get(fmt.Sprintf("%v", data), selector).String()
+		} else {
+			// HTML mode
+			doc, err := goquery.NewDocumentFromReader(strings.NewReader(fmt.Sprintf("%v", data)))
+			if err != nil {
+				return "", err
+			}
+			nextURL, _ = doc.Find(selector).Attr("href")
+		}
+	} else if block.Type == "playwright" {
+		// TODO: Implement Playwright next page logic
+		return "", fmt.Errorf("playwright next page not implemented")
+	}
+
+	if len(parts) > 1 {
+		pipedURL, err := parsers.ExecutePipe(nextURL, strings.TrimSpace(parts[1]))
+		if err != nil {
+			return "", err
+		}
+		nextURL = strings.TrimSpace(pipedURL)
+	}
+
+	return nextURL, nil
+}

outputs/json.go

@@ -0,0 +1,17 @@
+package outputs
+
+import (
+	"encoding/json"
+	"log"
+
+	"github.com/bjesus/erol/common"
+)
+
+func OutputJSON(app *common.ErolApp) error {
+	jsonData, err := json.MarshalIndent(app.Data, "", "  ")
+	if err != nil {
+		return err
+	}
+	log.Println(string(jsonData))
+	return nil
+}

outputs/template.go

@@ -0,0 +1,17 @@
+package outputs
+
+import (
+	"html/template"
+	"os"
+
+	"github.com/bjesus/erol/common"
+)
+
+func OutputTemplate(app *common.ErolApp, templateFile string) error {
+	tmpl, err := template.ParseFiles(templateFile)
+	if err != nil {
+		return err
+	}
+
+	return tmpl.Execute(os.Stdout, app.Data)
+}