gitlink-cli/shortcuts/issue/batch.go

package issue

import (
	"encoding/csv"
	"fmt"
	"os"
	"strconv"
	"strings"
	"time"

	"github.com/gitlink-org/gitlink-cli/shortcuts/common"
)

const closedIssueStatusID = 5

type batchResult struct {
	Number string `json:"number" yaml:"number"`
	Action string `json:"action" yaml:"action"`
	Status string `json:"status" yaml:"status"`
	Error  string `json:"error,omitempty" yaml:"error,omitempty"`
}

type batchSummary struct {
	Repository string        `json:"repository" yaml:"repository"`
	DryRun     bool          `json:"dry_run" yaml:"dry_run"`
	Total      int           `json:"total" yaml:"total"`
	Succeeded  int           `json:"succeeded" yaml:"succeeded"`
	Failed     int           `json:"failed" yaml:"failed"`
	Duration   string        `json:"duration" yaml:"duration"`
	Results    []batchResult `json:"results" yaml:"results"`
}

func newBatchCloseShortcut() *common.Shortcut {
	return &common.Shortcut{
		Name:        "batch-close",
		Description: "Close multiple issues by issue numbers or a CSV file",
		Flags: []common.Flag{
			{Name: "numbers", Short: "n", Usage: "Comma-separated issue numbers from the web URL, for example: 1,2,3"},
			{Name: "from", Usage: "Read issue numbers from a CSV file. Supports a number/issue_number/project_issues_index column or first column without header"},
			{Name: "dry-run", Usage: "Preview the issues that would be closed without changing them", Bool: true, Default: "false"},
		},
		Run: runBatchClose,
	}
}

func runBatchClose(ctx *common.RuntimeContext) error {
	if err := ctx.ResolveOwnerRepo(); err != nil {
		return err
	}

	start := time.Now()

	numbers, err := collectIssueNumbers(ctx.Arg("numbers"), ctx.Arg("from"))
	if err != nil {
		return err
	}
	if len(numbers) == 0 {
		return fmt.Errorf("no issue numbers provided; use --numbers 1,2,3 or --from issues.csv")
	}

	dryRun := parseBool(ctx.Arg("dry-run"))
	summary := batchSummary{
		Repository: fmt.Sprintf("%s/%s", ctx.Owner, ctx.Repo),
		DryRun:     dryRun,
		Total:      len(numbers),
		Results:    make([]batchResult, 0, len(numbers)),
	}

	for _, number := range numbers {
		result := batchResult{Number: number, Action: "close"}
		if dryRun {
			result.Status = "planned"
			summary.Succeeded++
			summary.Results = append(summary.Results, result)
			continue
		}

		if err := closeIssue(ctx, number); err != nil {
			result.Status = "failed"
			result.Error = err.Error()
			summary.Failed++
		} else {
			result.Status = "closed"
			summary.Succeeded++
		}
		summary.Results = append(summary.Results, result)
	}

	summary.Duration = time.Since(start).String()

	if err := ctx.OutputData(summary); err != nil {
		return err
	}
	if summary.Failed > 0 {
		return fmt.Errorf("%d of %d issue(s) failed to close", summary.Failed, summary.Total)
	}
	return nil
}

func closeIssue(ctx *common.RuntimeContext, number string) error {
	current, err := fetchExistingIssue(ctx, number)
	if err != nil {
		return fmt.Errorf("fetch issue: %w", err)
	}

	body := map[string]interface{}{
		"subject":     current.Subject,
		"description": current.Description,
		"status_id":   closedIssueStatusID,
	}
	if _, err := ctx.CallAPI("PATCH", fmt.Sprintf("%s/issues/%s", v1RepoPath(ctx), number), body); err != nil {
		return fmt.Errorf("close issue: %w", err)
	}
	return nil
}

func newBatchAssignShortcut() *common.Shortcut {
	return &common.Shortcut{
		Name:        "batch-assign",
		Description: "Assign multiple issues to a user by issue numbers or a CSV file",
		Flags: []common.Flag{
			{Name: "numbers", Short: "n", Usage: "Comma-separated issue numbers from the web URL, for example: 1,2,3"},
			{Name: "from", Usage: "Read issue numbers from a CSV file. Supports a number/issue_number/project_issues_index column or first column without header"},
			{Name: "user", Short: "u", Usage: "Assignee user login", Required: true},
			{Name: "dry-run", Usage: "Preview the issues that would be assigned without changing them", Bool: true, Default: "false"},
		},
		Run: runBatchAssign,
	}
}

func runBatchAssign(ctx *common.RuntimeContext) error {
	if err := ctx.ResolveOwnerRepo(); err != nil {
		return err
	}

	user, err := ctx.RequireArg("user")
	if err != nil {
		return err
	}

	numbers, err := collectIssueNumbers(ctx.Arg("numbers"), ctx.Arg("from"))
	if err != nil {
		return err
	}
	if len(numbers) == 0 {
		return fmt.Errorf("no issue numbers provided; use --numbers 1,2,3 or --from issues.csv")
	}

	dryRun := parseBool(ctx.Arg("dry-run"))
	summary := batchSummary{
		Repository: fmt.Sprintf("%s/%s", ctx.Owner, ctx.Repo),
		DryRun:     dryRun,
		Total:      len(numbers),
		Results:    make([]batchResult, 0, len(numbers)),
	}

	for _, number := range numbers {
		result := batchResult{Number: number, Action: "assign"}
		if dryRun {
			result.Status = "planned"
			summary.Succeeded++
			summary.Results = append(summary.Results, result)
			continue
		}

		if err := assignIssue(ctx, number, user); err != nil {
			result.Status = "failed"
			result.Error = err.Error()
			summary.Failed++
		} else {
			result.Status = "assigned"
			summary.Succeeded++
		}
		summary.Results = append(summary.Results, result)
	}

	if err := ctx.OutputData(summary); err != nil {
		return err
	}
	if summary.Failed > 0 {
		return fmt.Errorf("%d of %d issue(s) failed to assign", summary.Failed, summary.Total)
	}
	return nil
}

func assignIssue(ctx *common.RuntimeContext, number, user string) error {
	body := map[string]interface{}{
		"assigned_to_id": user,
	}
	if _, err := ctx.CallAPI("PUT", fmt.Sprintf("%s/issues/%s/assignees", v1RepoPath(ctx), number), body); err != nil {
		return fmt.Errorf("assign issue: %w", err)
	}
	return nil
}

func newBatchLabelShortcut() *common.Shortcut {
	return &common.Shortcut{
		Name:        "batch-label",
		Description: "Add or remove labels on multiple issues by issue numbers or a CSV file",
		Flags: []common.Flag{
			{Name: "numbers", Short: "n", Usage: "Comma-separated issue numbers from the web URL, for example: 1,2,3"},
			{Name: "from", Usage: "Read issue numbers from a CSV file. Supports a number/issue_number/project_issues_index column or first column without header"},
			{Name: "add", Short: "a", Usage: "Comma-separated label IDs to add"},
			{Name: "remove", Short: "r", Usage: "Comma-separated label IDs to remove"},
			{Name: "dry-run", Usage: "Preview the issues that would be labeled without changing them", Bool: true, Default: "false"},
		},
		Run: runBatchLabel,
	}
}

func runBatchLabel(ctx *common.RuntimeContext) error {
	if err := ctx.ResolveOwnerRepo(); err != nil {
		return err
	}

	addIDs := ctx.Arg("add")
	removeIDs := ctx.Arg("remove")
	if addIDs == "" && removeIDs == "" {
		return fmt.Errorf("at least one of --add or --remove is required")
	}

	numbers, err := collectIssueNumbers(ctx.Arg("numbers"), ctx.Arg("from"))
	if err != nil {
		return err
	}
	if len(numbers) == 0 {
		return fmt.Errorf("no issue numbers provided; use --numbers 1,2,3 or --from issues.csv")
	}

	dryRun := parseBool(ctx.Arg("dry-run"))
	summary := batchSummary{
		Repository: fmt.Sprintf("%s/%s", ctx.Owner, ctx.Repo),
		DryRun:     dryRun,
		Total:      len(numbers),
		Results:    make([]batchResult, 0, len(numbers)),
	}

	addLabels := parseCommaSeparated(addIDs)
	removeLabels := parseCommaSeparated(removeIDs)

	for _, number := range numbers {
		result := batchResult{Number: number, Action: "label"}
		if dryRun {
			result.Status = "planned"
			summary.Succeeded++
			summary.Results = append(summary.Results, result)
			continue
		}

		if err := labelIssue(ctx, number, addLabels, removeLabels); err != nil {
			result.Status = "failed"
			result.Error = err.Error()
			summary.Failed++
		} else {
			result.Status = "labeled"
			summary.Succeeded++
		}
		summary.Results = append(summary.Results, result)
	}

	if err := ctx.OutputData(summary); err != nil {
		return err
	}
	if summary.Failed > 0 {
		return fmt.Errorf("%d of %d issue(s) failed to label", summary.Failed, summary.Total)
	}
	return nil
}

func labelIssue(ctx *common.RuntimeContext, number string, addLabels, removeLabels []string) error {
	var errs []string
	for _, labelID := range addLabels {
		body := map[string]interface{}{
			"tag_id": labelID,
		}
		if _, err := ctx.CallAPI("POST", fmt.Sprintf("%s/issues/%s/tags", v1RepoPath(ctx), number), body); err != nil {
			errs = append(errs, fmt.Sprintf("add label %s: %v", labelID, err))
		}
	}
	for _, labelID := range removeLabels {
		if _, err := ctx.CallAPI("DELETE", fmt.Sprintf("%s/issues/%s/tags/%s", v1RepoPath(ctx), number, labelID), nil); err != nil {
			errs = append(errs, fmt.Sprintf("remove label %s: %v", labelID, err))
		}
	}
	if len(errs) > 0 {
		return fmt.Errorf("%s", strings.Join(errs, "\n"))
	}
	return nil
}

func newBatchMilestoneShortcut() *common.Shortcut {
	return &common.Shortcut{
		Name:        "batch-milestone",
		Description: "Set milestone on multiple issues by issue numbers or a CSV file",
		Flags: []common.Flag{
			{Name: "numbers", Short: "n", Usage: "Comma-separated issue numbers from the web URL, for example: 1,2,3"},
			{Name: "from", Usage: "Read issue numbers from a CSV file. Supports a number/issue_number/project_issues_index column or first column without header"},
			{Name: "milestone", Short: "m", Usage: "Milestone ID", Required: true},
			{Name: "dry-run", Usage: "Preview the issues that would be updated without changing them", Bool: true, Default: "false"},
		},
		Run: runBatchMilestone,
	}
}

func runBatchMilestone(ctx *common.RuntimeContext) error {
	if err := ctx.ResolveOwnerRepo(); err != nil {
		return err
	}

	milestoneID, err := ctx.RequireArg("milestone")
	if err != nil {
		return err
	}

	numbers, err := collectIssueNumbers(ctx.Arg("numbers"), ctx.Arg("from"))
	if err != nil {
		return err
	}
	if len(numbers) == 0 {
		return fmt.Errorf("no issue numbers provided; use --numbers 1,2,3 or --from issues.csv")
	}

	dryRun := parseBool(ctx.Arg("dry-run"))
	summary := batchSummary{
		Repository: fmt.Sprintf("%s/%s", ctx.Owner, ctx.Repo),
		DryRun:     dryRun,
		Total:      len(numbers),
		Results:    make([]batchResult, 0, len(numbers)),
	}

	for _, number := range numbers {
		result := batchResult{Number: number, Action: "milestone"}
		if dryRun {
			result.Status = "planned"
			summary.Succeeded++
			summary.Results = append(summary.Results, result)
			continue
		}

		if err := setMilestone(ctx, number, milestoneID); err != nil {
			result.Status = "failed"
			result.Error = err.Error()
			summary.Failed++
		} else {
			result.Status = "milestoned"
			summary.Succeeded++
		}
		summary.Results = append(summary.Results, result)
	}

	if err := ctx.OutputData(summary); err != nil {
		return err
	}
	if summary.Failed > 0 {
		return fmt.Errorf("%d of %d issue(s) failed to set milestone", summary.Failed, summary.Total)
	}
	return nil
}

func setMilestone(ctx *common.RuntimeContext, number, milestoneID string) error {
	current, err := fetchExistingIssue(ctx, number)
	if err != nil {
		return fmt.Errorf("fetch issue: %w", err)
	}

	body := map[string]interface{}{
		"subject":         current.Subject,
		"description":     current.Description,
		"fixed_version_id": milestoneID,
	}
	if _, err := ctx.CallAPI("PATCH", fmt.Sprintf("%s/issues/%s", v1RepoPath(ctx), number), body); err != nil {
		return fmt.Errorf("set milestone: %w", err)
	}
	return nil
}

func parseCommaSeparated(value string) []string {
	if strings.TrimSpace(value) == "" {
		return nil
	}
	var result []string
	for _, item := range strings.Split(value, ",") {
		if trimmed := strings.TrimSpace(item); trimmed != "" {
			result = append(result, trimmed)
		}
	}
	return result
}

func collectIssueNumbers(numbersValue, csvPath string) ([]string, error) {
	numbers, err := parseIssueNumbers(numbersValue)
	if err != nil {
		return nil, err
	}
	if csvPath == "" {
		return numbers, nil
	}

	csvNumbers, err := readIssueNumbersFromCSV(csvPath)
	if err != nil {
		return nil, err
	}
	return mergeIssueNumbers(numbers, csvNumbers), nil
}

func parseIssueNumbers(value string) ([]string, error) {
	if strings.TrimSpace(value) == "" {
		return nil, nil
	}
	return normalizeIssueNumbers(strings.Split(value, ","))
}

func readIssueNumbersFromCSV(path string) ([]string, error) {
	file, err := os.Open(path)
	if err != nil {
		return nil, fmt.Errorf("read issue numbers from CSV: %w", err)
	}
	defer file.Close()

	reader := csv.NewReader(file)
	reader.TrimLeadingSpace = true
	records, err := reader.ReadAll()
	if err != nil {
		return nil, fmt.Errorf("parse issue numbers from CSV: %w", err)
	}
	if len(records) == 0 {
		return nil, nil
	}

	numberColumn := -1
	startRow := 0
	for i, cell := range records[0] {
		switch strings.ToLower(strings.TrimSpace(cell)) {
		case "number", "issue_number", "project_issues_index":
			numberColumn = i
			startRow = 1
		}
	}
	if numberColumn == -1 {
		numberColumn = 0
	}

	values := make([]string, 0, len(records)-startRow)
	for _, record := range records[startRow:] {
		if numberColumn >= len(record) {
			continue
		}
		values = append(values, record[numberColumn])
	}
	return normalizeIssueNumbers(values)
}

func normalizeIssueNumbers(values []string) ([]string, error) {
	numbers := make([]string, 0, len(values))
	seen := map[string]bool{}
	for _, value := range values {
		number := strings.TrimSpace(value)
		if number == "" {
			continue
		}
		if _, err := strconv.ParseInt(number, 10, 64); err != nil {
			return nil, fmt.Errorf("invalid issue number %q: issue numbers must be integers", number)
		}
		if seen[number] {
			continue
		}
		seen[number] = true
		numbers = append(numbers, number)
	}
	return numbers, nil
}

func mergeIssueNumbers(values ...[]string) []string {
	merged := []string{}
	seen := map[string]bool{}
	for _, numbers := range values {
		for _, number := range numbers {
			if seen[number] {
				continue
			}
			seen[number] = true
			merged = append(merged, number)
		}
	}
	return merged
}

func parseBool(value string) bool {
	parsed, err := strconv.ParseBool(strings.TrimSpace(value))
	return err == nil && parsed
}