From ffd2a62c3f7df94365980302fef3bc3376b48182 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Mon, 3 Aug 2020 13:00:48 +0530
Subject: modularize repo, use pnpm, improve typechecking

---
 packages/taler-wallet-webextension/src/i18n.tsx | 206 ++++++++++++++++++++++++
 1 file changed, 206 insertions(+)
 create mode 100644 packages/taler-wallet-webextension/src/i18n.tsx

(limited to 'packages/taler-wallet-webextension/src/i18n.tsx')

diff --git a/packages/taler-wallet-webextension/src/i18n.tsx b/packages/taler-wallet-webextension/src/i18n.tsx
new file mode 100644
index 000000000..afbb0e278
--- /dev/null
+++ b/packages/taler-wallet-webextension/src/i18n.tsx
@@ -0,0 +1,206 @@
+/*
+ This file is part of TALER
+ (C) 2016 GNUnet e.V.
+
+ 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.
+
+ 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
+ TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Translation helpers for React components and template literals.
+ */
+
+/**
+ * Imports
+ */
+import React from "react";
+
+import { i18n as i18nCore } from "taler-wallet-core";
+/**
+ * Convert template strings to a msgid
+ */
+function toI18nString(stringSeq: ReadonlyArray<string>): string {
+  let s = "";
+  for (let i = 0; i < stringSeq.length; i++) {
+    s += stringSeq[i];
+    if (i < stringSeq.length - 1) {
+      s += `%${i + 1}$s`;
+    }
+  }
+  return s;
+}
+
+
+export const str = i18nCore.str;
+export const internalSetStrings = i18nCore.internalSetStrings;
+export const strings = i18nCore.strings;
+
+
+interface TranslateSwitchProps {
+  target: number;
+}
+
+function stringifyChildren(children: any): string {
+  let n = 1;
+  const ss = React.Children.map(children, (c) => {
+    if (typeof c === "string") {
+      return c;
+    }
+    return `%${n++}$s`;
+  });
+  const s = ss.join("").replace(/ +/g, " ").trim();
+  console.log("translation lookup", JSON.stringify(s));
+  return s;
+}
+
+interface TranslateProps {
+  /**
+   * Component that the translated element should be wrapped in.
+   * Defaults to "div".
+   */
+  wrap?: any;
+
+  /**
+   * Props to give to the wrapped component.
+   */
+  wrapProps?: any;
+}
+
+function getTranslatedChildren(
+  translation: string,
+  children: React.ReactNode,
+): React.ReactNode[] {
+  const tr = translation.split(/%(\d+)\$s/);
+  const childArray = React.Children.toArray(children);
+  // Merge consecutive string children.
+  const placeholderChildren = [];
+  for (let i = 0; i < childArray.length; i++) {
+    const x = childArray[i];
+    if (x === undefined) {
+      continue;
+    } else if (typeof x === "string") {
+      continue;
+    } else {
+      placeholderChildren.push(x);
+    }
+  }
+  const result = [];
+  for (let i = 0; i < tr.length; i++) {
+    if (i % 2 == 0) {
+      // Text
+      result.push(tr[i]);
+    } else {
+      const childIdx = Number.parseInt(tr[i]) - 1;
+      result.push(placeholderChildren[childIdx]);
+    }
+  }
+  return result;
+}
+
+/**
+ * Translate text node children of this component.
+ * If a child component might produce a text node, it must be wrapped
+ * in a another non-text element.
+ *
+ * Example:
+ * ```
+ * <Translate>
+ * Hello.  Your score is <span><PlayerScore player={player} /></span>
+ * </Translate>
+ * ```
+ */
+export class Translate extends React.Component<TranslateProps, {}> {
+  render(): JSX.Element {
+    const s = stringifyChildren(this.props.children);
+    const translation: string = i18nCore.jed.ngettext(s, s, 1);
+    const result = getTranslatedChildren(translation, this.props.children);
+    if (!this.props.wrap) {
+      return <div>{result}</div>;
+    }
+    return React.createElement(this.props.wrap, this.props.wrapProps, result);
+  }
+}
+
+/**
+ * Switch translation based on singular or plural based on the target prop.
+ * Should only contain TranslateSingular and TransplatePlural as children.
+ *
+ * Example:
+ * ```
+ * <TranslateSwitch target={n}>
+ *  <TranslateSingular>I have {n} apple.</TranslateSingular>
+ *  <TranslatePlural>I have {n} apples.</TranslatePlural>
+ * </TranslateSwitch>
+ * ```
+ */
+export class TranslateSwitch extends React.Component<
+  TranslateSwitchProps,
+  void
+> {
+  render(): JSX.Element {
+    let singular: React.ReactElement<TranslationPluralProps> | undefined;
+    let plural: React.ReactElement<TranslationPluralProps> | undefined;
+    const children = this.props.children;
+    if (children) {
+      React.Children.forEach(children, (child: any) => {
+        if (child.type === TranslatePlural) {
+          plural = child;
+        }
+        if (child.type === TranslateSingular) {
+          singular = child;
+        }
+      });
+    }
+    if (!singular || !plural) {
+      console.error("translation not found");
+      return React.createElement("span", {}, ["translation not found"]);
+    }
+    singular.props.target = this.props.target;
+    plural.props.target = this.props.target;
+    // We're looking up the translation based on the
+    // singular, even if we must use the plural form.
+    return singular;
+  }
+}
+
+interface TranslationPluralProps {
+  target: number;
+}
+
+/**
+ * See [[TranslateSwitch]].
+ */
+export class TranslatePlural extends React.Component<
+  TranslationPluralProps,
+  void
+> {
+  render(): JSX.Element {
+    const s = stringifyChildren(this.props.children);
+    const translation = i18nCore.jed.ngettext(s, s, 1);
+    const result = getTranslatedChildren(translation, this.props.children);
+    return <div>{result}</div>;
+  }
+}
+
+/**
+ * See [[TranslateSwitch]].
+ */
+export class TranslateSingular extends React.Component<
+  TranslationPluralProps,
+  void
+> {
+  render(): JSX.Element {
+    const s = stringifyChildren(this.props.children);
+    const translation = i18nCore.jed.ngettext(s, s, this.props.target);
+    const result = getTranslatedChildren(translation, this.props.children);
+    return <div>{result}</div>;
+  }
+}
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