1 files changed, 77 insertions, 0 deletions
diff --git a/sticker.pinapelz.com/src/widget-api.js b/sticker.pinapelz.com/src/widget-api.js
new file mode 100644
index 0000000..d9964a7
--- /dev/null
+++ b/sticker.pinapelz.com/src/widget-api.js
@@ -0,0 +1,77 @@
+// maunium-stickerpicker - A fast and simple Matrix sticker picker widget.
+// Copyright (C) 2020 Tulir Asokan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+let widgetId = null
+
+window.onmessage = event => {
+	if (!window.parent || !event.data) {
+		return
+	}
+
+	const request = event.data
+	if (!request.requestId || !request.widgetId || !request.action || request.api !== "toWidget") {
+		return
+	}
+
+	if (widgetId) {
+		if (widgetId !== request.widgetId) {
+			return
+		}
+	} else {
+		widgetId = request.widgetId
+	}
+
+	let response
+
+	if (request.action === "visibility") {
+		response = {}
+	} else if (request.action === "capabilities") {
+		response = { capabilities: ["m.sticker"] }
+	} else {
+		response = { error: { message: "Action not supported" } }
+	}
+
+	window.parent.postMessage({ ...request, response }, event.origin)
+}
+
+export function sendSticker(content) {
+	const data = {
+		content: { ...content },
+		// `name` is for Element Web (and also the spec)
+		// Element Android uses content -> body as the name
+		name: content.body,
+	}
+	// Custom field that stores the ID even for non-telegram stickers
+	delete data.content.id
+
+	// This is for Element iOS
+	const widgetData = {
+		...data,
+		description: content.body,
+		file: content.filename ?? `${content.id}.png`,
+	}
+	delete widgetData.content.filename
+	// Element iOS explodes if there are extra fields present
+	delete widgetData.content["net.maunium.telegram.sticker"]
+
+	window.parent.postMessage({
+		api: "fromWidget",
+		action: "m.sticker",
+		requestId: `sticker-${Date.now()}`,
+		widgetId,
+		data,
+		widgetData,
+	}, "*")
+}