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diff --git a/packages/merchant-backoffice-ui/src/components/modal/index.tsx b/packages/merchant-backoffice-ui/src/components/modal/index.tsx
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+/*
+ This file is part of GNU Taler
+ (C) 2021 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/>
+ */
+
+/**
+*
+* @author Sebastian Javier Marchano (sebasjm)
+*/
+
+
+import { ComponentChildren, h, VNode } from "preact";
+import { useState } from "preact/hooks";
+import { useInstanceContext } from "../../context/instance";
+import { Translate, useTranslator } from "../../i18n";
+import { DEFAULT_REQUEST_TIMEOUT } from "../../utils/constants";
+import { Loading, Spinner } from "../exception/loading";
+import { FormProvider } from "../form/FormProvider";
+import { Input } from "../form/Input";
+
+interface Props {
+  active?: boolean;
+  description?: string;
+  onCancel?: () => void;
+  onConfirm?: () => void;
+  label?: string;
+  children?: ComponentChildren;
+  danger?: boolean;
+  disabled?: boolean;
+}
+
+export function ConfirmModal({ active, description, onCancel, onConfirm, children, danger, disabled, label = 'Confirm' }: Props): VNode {
+  return <div class={active ? "modal is-active" : "modal"}>
+    <div class="modal-background " onClick={onCancel} />
+    <div class="modal-card" style={{maxWidth: 700}}>
+      <header class="modal-card-head">
+        {!description ? null : <p class="modal-card-title"><b>{description}</b></p>}
+        <button class="delete " aria-label="close" onClick={onCancel} />
+      </header>
+      <section class="modal-card-body">
+        {children}
+      </section>
+      <footer class="modal-card-foot">
+        <div class="buttons is-right" style={{ width: '100%' }}>
+          <button class="button " onClick={onCancel} ><Translate>Cancel</Translate></button>
+          <button class={danger ? "button is-danger " : "button is-info "} disabled={disabled} onClick={onConfirm} ><Translate>{label}</Translate></button>
+        </div>
+      </footer>
+    </div>
+    <button class="modal-close is-large " aria-label="close" onClick={onCancel} />
+  </div>
+}
+
+export function ContinueModal({ active, description, onCancel, onConfirm, children, disabled }: Props): VNode {
+  return <div class={active ? "modal is-active" : "modal"}>
+    <div class="modal-background " onClick={onCancel} />
+    <div class="modal-card">
+      <header class="modal-card-head has-background-success">
+        {!description ? null : <p class="modal-card-title">{description}</p>}
+        <button class="delete " aria-label="close" onClick={onCancel} />
+      </header>
+      <section class="modal-card-body">
+        {children}
+      </section>
+      <footer class="modal-card-foot">
+        <div class="buttons is-right" style={{ width: '100%' }}>
+          <button class="button is-success " disabled={disabled} onClick={onConfirm} ><Translate>Continue</Translate></button>
+        </div>
+      </footer>
+    </div>
+    <button class="modal-close is-large " aria-label="close" onClick={onCancel} />
+  </div>
+}
+
+export function SimpleModal({ onCancel, children }: any): VNode {
+  return <div class="modal is-active">
+    <div class="modal-background " onClick={onCancel} />
+    <div class="modal-card">
+      <section class="modal-card-body is-main-section">
+        {children}
+      </section>
+    </div>
+    <button class="modal-close is-large " aria-label="close" onClick={onCancel} />
+  </div>
+}
+
+export function ClearConfirmModal({ description, onCancel, onClear, onConfirm, children }: Props & { onClear?: () => void }): VNode {
+  return <div class="modal is-active">
+    <div class="modal-background " onClick={onCancel} />
+    <div class="modal-card">
+      <header class="modal-card-head">
+        {!description ? null : <p class="modal-card-title">{description}</p>}
+        <button class="delete " aria-label="close" onClick={onCancel} />
+      </header>
+      <section class="modal-card-body is-main-section">
+        {children}
+      </section>
+      <footer class="modal-card-foot">
+        {onClear && <button class="button is-danger" onClick={onClear} disabled={onClear === undefined} ><Translate>Clear</Translate></button>}
+        <div class="buttons is-right" style={{ width: '100%' }}>
+          <button class="button " onClick={onCancel} ><Translate>Cancel</Translate></button>
+          <button class="button is-info" onClick={onConfirm} disabled={onConfirm === undefined} ><Translate>Confirm</Translate></button>
+        </div>
+      </footer>
+    </div>
+    <button class="modal-close is-large " aria-label="close" onClick={onCancel} />
+  </div>
+}
+
+interface DeleteModalProps {
+  element: { id: string, name: string };
+  onCancel: () => void;
+  onConfirm: (id: string) => void;
+}
+
+export function DeleteModal({ element, onCancel, onConfirm }: DeleteModalProps): VNode {
+  return <ConfirmModal label={`Delete instance`} description={`Delete the instance "${element.name}"`} danger active onCancel={onCancel} onConfirm={() => onConfirm(element.id)}>
+    <p>If you delete the instance named <b>"{element.name}"</b> (ID: <b>{element.id}</b>), the merchant will no longer be able to process orders or refunds</p>
+    <p>This action deletes the instance private key, but preserves all transaction data. You can still access that data after deleting the instance.</p>
+    <p class="warning">Deleting an instance <b>cannot be undone</b>.</p>
+  </ConfirmModal>
+}
+
+export function PurgeModal({ element, onCancel, onConfirm }: DeleteModalProps): VNode {
+  return <ConfirmModal label={`Purge the instance`} description={`Purge the instance "${element.name}"`} danger active onCancel={onCancel} onConfirm={() => onConfirm(element.id)}>
+    <p>If you purge the instance named <b>"{element.name}"</b> (ID: <b>{element.id}</b>), you will also delete all it's transaction data.</p>
+    <p>The instance will disappear from your list, and you will no longer be able to access it's data.</p>
+    <p class="warning">Purging an instance <b>cannot be undone</b>.</p>
+  </ConfirmModal>
+}
+
+interface UpdateTokenModalProps {
+  oldToken?: string;
+  onCancel: () => void;
+  onConfirm: (value: string) => void;
+  onClear: () => void;
+}
+
+//FIXME: merge UpdateTokenModal with SetTokenNewInstanceModal
+export function UpdateTokenModal({ onCancel, onClear, onConfirm, oldToken }: UpdateTokenModalProps): VNode {
+  type State = { old_token: string, new_token: string, repeat_token: string }
+  const [form, setValue] = useState<Partial<State>>({
+    old_token: '', new_token: '', repeat_token: '',
+  })
+  const i18n = useTranslator()
+
+  const hasInputTheCorrectOldToken = oldToken && oldToken !== form.old_token
+  const errors = {
+    old_token: hasInputTheCorrectOldToken ? i18n`is not the same as the current access token` : undefined,
+    new_token: !form.new_token ? i18n`cannot be empty` : (form.new_token === form.old_token ? i18n`cannot be the same as the old token` : undefined),
+    repeat_token: form.new_token !== form.repeat_token ? i18n`is not the same` : undefined
+  }
+
+  const hasErrors = Object.keys(errors).some(k => (errors as any)[k] !== undefined)
+
+  const instance = useInstanceContext()
+
+  const text = i18n`You are updating the access token from instance with id ${instance.id}`
+
+  return <ClearConfirmModal description={text}
+    onCancel={onCancel}
+    onConfirm={!hasErrors ? () => onConfirm(form.new_token!) : undefined}
+    onClear={!hasInputTheCorrectOldToken && oldToken ? onClear : undefined}
+  >
+    <div class="columns">
+      <div class="column" />
+      <div class="column is-four-fifths" >
+        <FormProvider errors={errors} object={form} valueHandler={setValue}>
+          {oldToken && <Input<State> name="old_token" label={i18n`Old access token`} tooltip={i18n`access token currently in use`} inputType="password" />}
+          <Input<State> name="new_token" label={i18n`New access token`} tooltip={i18n`next access token to be used`} inputType="password" />
+          <Input<State> name="repeat_token" label={i18n`Repeat access token`} tooltip={i18n`confirm the same access token`} inputType="password" />
+        </FormProvider>
+        <p><Translate>Clearing the access token will mean public access to the instance</Translate></p>
+      </div>
+      <div class="column" />
+    </div>
+  </ClearConfirmModal>
+}
+
+export function SetTokenNewInstanceModal({ onCancel, onClear, onConfirm }: UpdateTokenModalProps): VNode {
+  type State = { old_token: string, new_token: string, repeat_token: string }
+  const [form, setValue] = useState<Partial<State>>({
+    new_token: '', repeat_token: '',
+  })
+  const i18n = useTranslator()
+
+  const errors = {
+    new_token: !form.new_token ? i18n`cannot be empty` : (form.new_token === form.old_token ? i18n`cannot be the same as the old access token` : undefined),
+    repeat_token: form.new_token !== form.repeat_token ? i18n`is not the same` : undefined
+  }
+
+  const hasErrors = Object.keys(errors).some(k => (errors as any)[k] !== undefined)
+
+
+  return <div class="modal is-active">
+    <div class="modal-background " onClick={onCancel} />
+    <div class="modal-card">
+      <header class="modal-card-head">
+        <p class="modal-card-title">{i18n`You are setting the access token for the new instance`}</p>
+        <button class="delete " aria-label="close" onClick={onCancel} />
+      </header>
+      <section class="modal-card-body is-main-section">
+        <div class="columns">
+          <div class="column" />
+          <div class="column is-four-fifths" >
+            <FormProvider errors={errors} object={form} valueHandler={setValue}>
+              <Input<State> name="new_token" label={i18n`New access token`} tooltip={i18n`next access token to be used`} inputType="password" />
+              <Input<State> name="repeat_token" label={i18n`Repeat access token`} tooltip={i18n`confirm the same access token`} inputType="password" />
+            </FormProvider>
+            <p><Translate>With external authorization method no check will be done by the merchant backend</Translate></p>
+          </div>
+          <div class="column" />
+        </div>
+      </section>
+      <footer class="modal-card-foot">
+        {onClear && <button class="button is-danger" onClick={onClear} disabled={onClear === undefined} ><Translate>Set external authorization</Translate></button>}
+        <div class="buttons is-right" style={{ width: '100%' }}>
+          <button class="button " onClick={onCancel} ><Translate>Cancel</Translate></button>
+          <button class="button is-info" onClick={() => onConfirm(form.new_token!)} disabled={hasErrors} ><Translate>Set access token</Translate></button>
+        </div>
+      </footer>
+    </div>
+    <button class="modal-close is-large " aria-label="close" onClick={onCancel} />
+  </div>
+}
+
+export function LoadingModal({ onCancel }: { onCancel: () => void }): VNode {
+  const i18n = useTranslator()
+  return <div class="modal is-active">
+    <div class="modal-background " onClick={onCancel} />
+    <div class="modal-card">
+      <header class="modal-card-head">
+        <p class="modal-card-title"><Translate>Operation in progress...</Translate></p>
+      </header>
+      <section class="modal-card-body">
+        <div class="columns">
+          <div class="column" />
+          <Spinner />
+          <div class="column" />
+        </div>
+        <p>{i18n`The operation will be automatically canceled after ${DEFAULT_REQUEST_TIMEOUT} seconds`}</p>
+      </section>
+      <footer class="modal-card-foot">
+        <div class="buttons is-right" style={{ width: '100%' }}>
+          <button class="button " onClick={onCancel} ><Translate>Cancel</Translate></button>
+        </div>
+      </footer>
+    </div>
+    <button class="modal-close is-large " aria-label="close" onClick={onCancel} />
+  </div>
+}