diff -r 000000000000 -r 5abace724584 printer/plain.go
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/printer/plain.go	Wed Apr 19 19:08:47 2017 +0200
@@ -0,0 +1,272 @@
+// Copyright © 2017 Mikael Berthe <mikael@lilotux.net>
+//
+// Licensed under the MIT license.
+// Please see the LICENSE file is this directory.
+
+package printer
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+	"time"
+
+	"github.com/jaytaylor/html2text"
+
+	"github.com/McKael/madon"
+)
+
+// PlainPrinter is the default "plain text" printer
+type PlainPrinter struct {
+	Indent      string
+	NoSubtitles bool
+}
+
+// NewPrinterPlain returns a plaintext ResourcePrinter
+// For PlainPrinter, the option parameter contains the indent prefix.
+func NewPrinterPlain(option string) (*PlainPrinter, error) {
+	indentInc := "  "
+	if option != "" {
+		indentInc = option
+	}
+	return &PlainPrinter{Indent: indentInc}, nil
+}
+
+// PrintObj sends the object as text to the writer
+// If the writer w is nil, standard output will be used.
+// For PlainPrinter, the option parameter contains the initial indent.
+func (p *PlainPrinter) PrintObj(obj interface{}, w io.Writer, initialIndent string) error {
+	if w == nil {
+		w = os.Stdout
+	}
+	switch o := obj.(type) {
+	case []madon.Account, []madon.Attachment, []madon.Card, []madon.Context,
+		[]madon.Instance, []madon.Mention, []madon.Notification,
+		[]madon.Relationship, []madon.Report, []madon.Results,
+		[]madon.Status, []madon.StreamEvent, []madon.Tag:
+		return p.plainForeach(o, w, initialIndent)
+	case *madon.Account:
+		return p.plainPrintAccount(o, w, initialIndent)
+	case madon.Account:
+		return p.plainPrintAccount(&o, w, initialIndent)
+	case *madon.Attachment:
+		return p.plainPrintAttachment(o, w, initialIndent)
+	case madon.Attachment:
+		return p.plainPrintAttachment(&o, w, initialIndent)
+	case *madon.Card:
+		return p.plainPrintCard(o, w, initialIndent)
+	case madon.Card:
+		return p.plainPrintCard(&o, w, initialIndent)
+	case *madon.Context:
+		return p.plainPrintContext(o, w, initialIndent)
+	case madon.Context:
+		return p.plainPrintContext(&o, w, initialIndent)
+	case *madon.Instance:
+		return p.plainPrintInstance(o, w, initialIndent)
+	case madon.Instance:
+		return p.plainPrintInstance(&o, w, initialIndent)
+	case *madon.Notification:
+		return p.plainPrintNotification(o, w, initialIndent)
+	case madon.Notification:
+		return p.plainPrintNotification(&o, w, initialIndent)
+	case *madon.Relationship:
+		return p.plainPrintRelationship(o, w, initialIndent)
+	case madon.Relationship:
+		return p.plainPrintRelationship(&o, w, initialIndent)
+	case *madon.Report:
+		return p.plainPrintReport(o, w, initialIndent)
+	case madon.Report:
+		return p.plainPrintReport(&o, w, initialIndent)
+	case *madon.Results:
+		return p.plainPrintResults(o, w, initialIndent)
+	case madon.Results:
+		return p.plainPrintResults(&o, w, initialIndent)
+	case *madon.Status:
+		return p.plainPrintStatus(o, w, initialIndent)
+	case madon.Status:
+		return p.plainPrintStatus(&o, w, initialIndent)
+	case *madon.UserToken:
+		return p.plainPrintUserToken(o, w, initialIndent)
+	case madon.UserToken:
+		return p.plainPrintUserToken(&o, w, initialIndent)
+	}
+	// TODO: Mention
+	// TODO: StreamEvent
+	// TODO: Tag
+
+	return fmt.Errorf("PlainPrinter not yet implemented for %T (try json or yaml...)", obj)
+}
+
+func (p *PlainPrinter) plainForeach(ol interface{}, w io.Writer, ii string) error {
+	switch reflect.TypeOf(ol).Kind() {
+	case reflect.Slice:
+		s := reflect.ValueOf(ol)
+
+		for i := 0; i < s.Len(); i++ {
+			o := s.Index(i).Interface()
+			if err := p.PrintObj(o, w, ii); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func html2string(h string) string {
+	t, err := html2text.FromString(h)
+	if err == nil {
+		return t
+	}
+	return h // Failed: return initial string
+}
+
+func indentedPrint(w io.Writer, indent string, title, skipIfEmpty bool, label string, format string, args ...interface{}) {
+	prefix := indent
+	if title {
+		prefix += "- "
+	} else {
+		prefix += "  "
+	}
+	value := fmt.Sprintf(format, args...)
+	if !title && skipIfEmpty && len(value) == 0 {
+		return
+	}
+	fmt.Fprintf(w, "%s%s: %s\n", prefix, label, value)
+}
+
+func (p *PlainPrinter) plainPrintAccount(a *madon.Account, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Account ID", "%d (%s)", a.ID, a.Username)
+	indentedPrint(w, indent, false, false, "User ID", "%s", a.Acct)
+	indentedPrint(w, indent, false, false, "Display name", "%s", a.DisplayName)
+	indentedPrint(w, indent, false, false, "Creation date", "%v", a.CreatedAt.Local())
+	indentedPrint(w, indent, false, false, "URL", "%s", a.URL)
+	indentedPrint(w, indent, false, false, "Statuses count", "%d", a.StatusesCount)
+	indentedPrint(w, indent, false, false, "Followers count", "%d", a.FollowersCount)
+	indentedPrint(w, indent, false, false, "Following count", "%d", a.FollowingCount)
+	if a.Locked {
+		indentedPrint(w, indent, false, false, "Locked", "%v", a.Locked)
+	}
+	indentedPrint(w, indent, false, true, "User note", "%s", html2string(a.Note)) // XXX too long?
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintAttachment(a *madon.Attachment, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Attachment ID", "%d", a.ID)
+	indentedPrint(w, indent, false, false, "Type", "%s", a.Type)
+	indentedPrint(w, indent, false, false, "Local URL", "%s", a.URL)
+	indentedPrint(w, indent, false, true, "Remote URL", "%s", a.RemoteURL)
+	indentedPrint(w, indent, false, true, "Preview URL", "%s", a.PreviewURL)
+	indentedPrint(w, indent, false, true, "Text URL", "%s", a.PreviewURL)
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintCard(c *madon.Card, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Card title", "%s", c.Title)
+	indentedPrint(w, indent, false, true, "Description", "%s", c.Description)
+	indentedPrint(w, indent, false, true, "URL", "%s", c.URL)
+	indentedPrint(w, indent, false, true, "Image", "%s", c.Image)
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintContext(c *madon.Context, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Context", "%d relative(s)", len(c.Ancestors)+len(c.Descendents))
+	if len(c.Ancestors) > 0 {
+		indentedPrint(w, indent, false, false, "Ancestors", "")
+		p.PrintObj(c.Ancestors, w, indent+p.Indent)
+	}
+	if len(c.Descendents) > 0 {
+		indentedPrint(w, indent, false, false, "Descendents", "")
+		p.PrintObj(c.Descendents, w, indent+p.Indent)
+	}
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintInstance(i *madon.Instance, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Instance title", "%s", i.Title)
+	indentedPrint(w, indent, false, true, "Description", "%s", html2string(i.Description))
+	indentedPrint(w, indent, false, true, "URL", "%s", i.URI)
+	indentedPrint(w, indent, false, true, "Email", "%s", i.Email)
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintNotification(n *madon.Notification, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Notification ID", "%d", n.ID)
+	indentedPrint(w, indent, false, false, "Type", "%s", n.Type)
+	indentedPrint(w, indent, false, false, "Timestamp", "%v", n.CreatedAt.Local())
+	if n.Account != nil {
+		indentedPrint(w, indent+p.Indent, true, false, "Account", "(%d) @%s - %s",
+			n.Account.ID, n.Account.Acct, n.Account.DisplayName)
+	}
+	if n.Status != nil {
+		p.plainPrintStatus(n.Status, w, indent+p.Indent)
+	}
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintRelationship(r *madon.Relationship, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "ID", "%d", r.ID)
+	indentedPrint(w, indent, false, false, "Following", "%v", r.Following)
+	indentedPrint(w, indent, false, false, "Followed-by", "%v", r.FollowedBy)
+	indentedPrint(w, indent, false, false, "Blocking", "%v", r.Blocking)
+	indentedPrint(w, indent, false, false, "Muting", "%v", r.Muting)
+	indentedPrint(w, indent, false, false, "Requested", "%v", r.Requested)
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintReport(r *madon.Report, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Report ID", "%d", r.ID)
+	indentedPrint(w, indent, false, false, "Action taken", "%s", r.ActionTaken)
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintResults(r *madon.Results, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Results", "%d account(s), %d status(es), %d hashtag(s)",
+		len(r.Accounts), len(r.Statuses), len(r.Hashtags))
+	if len(r.Accounts) > 0 {
+		indentedPrint(w, indent, false, false, "Accounts", "")
+		p.PrintObj(r.Accounts, w, indent+p.Indent)
+	}
+	if len(r.Statuses) > 0 {
+		indentedPrint(w, indent, false, false, "Statuses", "")
+		p.PrintObj(r.Statuses, w, indent+p.Indent)
+	}
+	if len(r.Hashtags) > 0 {
+		indentedPrint(w, indent, false, false, "Hashtags", "")
+		for _, tag := range r.Hashtags {
+			indentedPrint(w, indent+p.Indent, true, false, "Tag", "%s", tag)
+		}
+	}
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintStatus(s *madon.Status, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "Status ID", "%d", s.ID)
+	indentedPrint(w, indent, false, false, "From", "%s", s.Account.Acct)
+	indentedPrint(w, indent, false, false, "Timestamp", "%v", s.CreatedAt.Local())
+
+	if s.Reblog != nil {
+		indentedPrint(w, indent, false, false, "Reblogged from", "%s", s.Reblog.Account.Username)
+		return p.plainPrintStatus(s.Reblog, w, indent+p.Indent)
+	}
+
+	indentedPrint(w, indent, false, false, "Contents", "%s", html2string(s.Content))
+	if s.InReplyToID > 0 {
+		indentedPrint(w, indent, false, false, "In-Reply-To", "%d", s.InReplyToID)
+	}
+	if s.Reblogged {
+		indentedPrint(w, indent, false, false, "Reblogged", "%v", s.Reblogged)
+	}
+	indentedPrint(w, indent, false, false, "URL", "%s", s.URL)
+	return nil
+}
+
+func (p *PlainPrinter) plainPrintUserToken(s *madon.UserToken, w io.Writer, indent string) error {
+	indentedPrint(w, indent, true, false, "User token", "%s", s.AccessToken)
+	indentedPrint(w, indent, false, true, "Type", "%s", s.TokenType)
+	if s.CreatedAt != 0 {
+		indentedPrint(w, indent, false, true, "Timestamp", "%v", time.Unix(int64(s.CreatedAt), 0))
+	}
+	indentedPrint(w, indent, false, true, "Scope", "%s", s.Scope)
+	return nil
+}