From 056211147d3a522a0c11dc476841e1cec27783ef Mon Sep 17 00:00:00 2001
From: Tom Hacohen <tom@stosb.com>
Date: Fri, 2 Oct 2020 09:22:45 +0300
Subject: [PATCH] Settings: implement changing password.

---
 src/Settings/index.tsx | 138 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 137 insertions(+), 1 deletion(-)

diff --git a/src/Settings/index.tsx b/src/Settings/index.tsx
index 903425c..579193f 100644
--- a/src/Settings/index.tsx
+++ b/src/Settings/index.tsx
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import * as React from "react";
+import * as Etebase from "etebase";
 import { useSelector, useDispatch } from "react-redux";
 
 import Select from "@material-ui/core/Select";
@@ -13,12 +14,17 @@ import Switch from "@material-ui/core/Switch";
 import InputLabel from "@material-ui/core/InputLabel";
 
 import { StoreState } from "../store";
-import { setSettings } from "../store/actions";
+import { setSettings, login, pushMessage } from "../store/actions";
 
 import Container from "../widgets/Container";
 import AppBarOverride from "../widgets/AppBarOverride";
 import PrettyFingerprint from "../widgets/PrettyFingerprint";
 import { useCredentials } from "../credentials";
+import { Button } from "@material-ui/core";
+import ConfirmationDialog from "../widgets/ConfirmationDialog";
+import PasswordField from "../widgets/PasswordField";
+import Alert from "@material-ui/lab/Alert";
+import { PASSWORD_MIN_LENGTH, startTask, enforcePasswordRules } from "../helpers";
 
 function SecurityFingerprint() {
   const etebase = useCredentials()!;
@@ -35,6 +41,133 @@ function SecurityFingerprint() {
   );
 }
 
+interface ChangePasswordFormErrors {
+  oldPassword?: string;
+  newPassword?: string;
+
+  general?: string;
+}
+
+function ChangePassword() {
+  const etebase = useCredentials()!;
+  const dispatch = useDispatch();
+  const [showDialog, setShowDialog] = React.useState(false);
+  const [oldPassword, setOldPassword] = React.useState("");
+  const [newPassword, setNewPassword] = React.useState("");
+  const [errors, setErrors] = React.useState<ChangePasswordFormErrors>({});
+
+  const styles = {
+    infoAlert: {
+      marginTop: 20,
+    },
+    textField: {
+      marginTop: 20,
+      width: "18em",
+    },
+  };
+
+  function handleInputChange(func: (value: string) => void) {
+    return (event: React.ChangeEvent<any>) => {
+      func(event.target.value);
+    };
+  }
+
+  async function onChangePassword() {
+    try {
+      const fieldNotEmpty = "Password can't be empty.";
+      const errors: ChangePasswordFormErrors = {};
+      if (!oldPassword) {
+        errors.oldPassword = fieldNotEmpty;
+      }
+      if (!newPassword) {
+        errors.newPassword = fieldNotEmpty;
+      } else {
+        const passwordRulesError = enforcePasswordRules(newPassword);
+        if (passwordRulesError) {
+          errors.newPassword = passwordRulesError;
+        }
+      }
+
+      setErrors(errors);
+      if (Object.keys(errors).length > 0) {
+        return;
+      }
+
+      await startTask(async () => {
+        const serverUrl = etebase.serverUrl;
+        const username = etebase.user.username;
+        try {
+          const etebase = await Etebase.Account.login(username, oldPassword, serverUrl);
+          await etebase.logout();
+        } catch (e) {
+          if (e instanceof Etebase.UnauthorizedError) {
+            setErrors({ oldPassword: "Error: wrong encryption password." });
+          } else {
+            setErrors({ oldPassword: e.toString() });
+          }
+          return;
+        }
+
+        try {
+          await etebase.changePassword(newPassword);
+          dispatch(login(etebase));
+          dispatch(pushMessage({ message: "Password successfully changed.", severity: "success" }));
+          setShowDialog(false);
+        } catch (e) {
+          setErrors({ newPassword: e.toString() });
+        }
+      });
+    } finally {
+      // Cleanup
+    }
+  }
+
+  return (
+    <>
+      <p>
+        Change your password by clicking here;
+      </p>
+      <Button color="secondary" variant="contained" onClick={() => setShowDialog(true)}>
+        Change Password
+      </Button>
+      <ConfirmationDialog
+        title="Change Password"
+        key={showDialog}
+        open={showDialog}
+        onOk={onChangePassword}
+        onCancel={() => setShowDialog(false)}
+      >
+        <PasswordField
+          style={styles.textField}
+          error={!!errors.oldPassword}
+          helperText={errors.oldPassword}
+          label="Current Password"
+          value={oldPassword}
+          onChange={handleInputChange(setOldPassword)}
+        />
+        <PasswordField
+          style={styles.textField}
+          error={!!errors.newPassword}
+          helperText={errors.newPassword}
+          label="New Password"
+          inputProps={{
+            minLength: PASSWORD_MIN_LENGTH,
+          }}
+          value={newPassword}
+          onChange={handleInputChange(setNewPassword)}
+        />
+        {errors.general && (
+          <Alert severity="error" style={styles.infoAlert}>{errors.general}</Alert>
+        )}
+
+        <Alert severity="warning" style={styles.infoAlert}>
+          Please make sure you remember your password, as it <em>can't</em> be recovered if lost!
+        </Alert>
+      </ConfirmationDialog>
+    </>
+  );
+}
+
 export default React.memo(function Settings() {
   const etebase = useCredentials();
   const dispatch = useDispatch();
@@ -58,6 +191,9 @@ export default React.memo(function Settings() {
             <h1>Account</h1>
             <h2>Security Fingerprint</h2>
             <SecurityFingerprint />
+
+            <h2>Password</h2>
+            <ChangePassword />
           </>
         )}