1 files changed, 130 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/components/TermsOfService/utils.ts b/packages/taler-wallet-webextension/src/components/TermsOfService/utils.ts
new file mode 100644
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+++ b/packages/taler-wallet-webextension/src/components/TermsOfService/utils.ts
@@ -0,0 +1,130 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022 Taler Systems S.A.
+
+ GNU Taler 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, or (at your option) any later version.
+
+ GNU Taler 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
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+import { GetExchangeTosResult } from "@gnu-taler/taler-util";
+
+export function buildTermsOfServiceState(
+  tos: GetExchangeTosResult,
+): TermsState {
+  const content: TermsDocument | undefined = parseTermsOfServiceContent(
+    tos.contentType,
+    tos.content,
+  );
+
+  const status: TermsStatus = buildTermsOfServiceStatus(
+    tos.content,
+    tos.acceptedEtag,
+    tos.currentEtag,
+  );
+
+  return { content, status, version: tos.currentEtag };
+}
+export function buildTermsOfServiceStatus(
+  content: string | undefined,
+  acceptedVersion: string | undefined,
+  currentVersion: string | undefined,
+): TermsStatus {
+  return !content
+    ? "notfound"
+    : !acceptedVersion
+    ? "new"
+    : acceptedVersion !== currentVersion
+    ? "changed"
+    : "accepted";
+}
+
+function parseTermsOfServiceContent(
+  type: string,
+  text: string,
+): TermsDocument | undefined {
+  if (type === "text/xml") {
+    try {
+      const document = new DOMParser().parseFromString(text, "text/xml");
+      return { type: "xml", document };
+    } catch (e) {
+      console.log(e);
+    }
+  } else if (type === "text/html") {
+    try {
+      const href = new URL(text);
+      return { type: "html", href };
+    } catch (e) {
+      console.log(e);
+    }
+  } else if (type === "text/json") {
+    try {
+      const data = JSON.parse(text);
+      return { type: "json", data };
+    } catch (e) {
+      console.log(e);
+    }
+  } else if (type === "text/pdf") {
+    try {
+      const location = new URL(text);
+      return { type: "pdf", location };
+    } catch (e) {
+      console.log(e);
+    }
+  } else if (type === "text/plain") {
+    try {
+      const content = text;
+      return { type: "plain", content };
+    } catch (e) {
+      console.log(e);
+    }
+  }
+  return undefined;
+}
+
+export type TermsState = {
+  content: TermsDocument | undefined;
+  status: TermsStatus;
+  version: string;
+};
+
+type TermsStatus = "new" | "accepted" | "changed" | "notfound";
+
+export type TermsDocument =
+  | TermsDocumentXml
+  | TermsDocumentHtml
+  | TermsDocumentPlain
+  | TermsDocumentJson
+  | TermsDocumentPdf;
+
+export interface TermsDocumentXml {
+  type: "xml";
+  document: Document;
+}
+
+export interface TermsDocumentHtml {
+  type: "html";
+  href: URL;
+}
+
+export interface TermsDocumentPlain {
+  type: "plain";
+  content: string;
+}
+
+export interface TermsDocumentJson {
+  type: "json";
+  data: any;
+}
+
+export interface TermsDocumentPdf {
+  type: "pdf";
+  location: URL;
+}