We build too many walls and not enough bridges

2020-04-08 12:59:16 +02:00
commit 17f4d6097a
494 changed files with 62753 additions and 0 deletions
--- a/pkg/message/html.go
+++ b/pkg/message/html.go
@ -0,0 +1,71 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package message
+
+import (
+	"bytes"
+	escape "html"
+	"strings"
+
+	"github.com/andybalholm/cascadia"
+	"golang.org/x/net/html"
+)
+
+func plaintextToHTML(text string) (output string) {
+	text = escape.EscapeString(text)
+	text = strings.Replace(text, "\n\r", "<br>", -1)
+	text = strings.Replace(text, "\r\n", "<br>", -1)
+	text = strings.Replace(text, "\n", "<br>", -1)
+	text = strings.Replace(text, "\r", "<br>", -1)
+
+	return "<div>" + text + "</div>"
+}
+
+func stripHTML(input string) (stripped string, err error) {
+	reader := strings.NewReader(input)
+	doc, _ := html.Parse(reader)
+	body := cascadia.MustCompile("body").MatchFirst(doc)
+	var buf1 bytes.Buffer
+	if err = html.Render(&buf1, body); err != nil {
+		stripped = input
+		return
+	}
+	stripped = buf1.String()
+	// Handle double body tags edge case.
+	if strings.Index(stripped, "<body") == 0 {
+		startIndex := strings.Index(stripped, ">")
+		if startIndex < 5 {
+			return
+		}
+		stripped = stripped[startIndex+1:]
+		// Closing body tag is optional.
+		closingIndex := strings.Index(stripped, "</body>")
+		if closingIndex > -1 {
+			stripped = stripped[:closingIndex]
+		}
+	}
+	return
+}
+
+func addOuterHTMLTags(input string) (output string) {
+	return "<html><head></head><body>" + input + "</body></html>"
+}
+
+func makeEmbeddedImageHTML(cid, name string) (output string) {
+	return "<img class=\"proton-embedded\" alt=\"" + name + "\" src=\"cid:" + cid + "\">"
+}