cancel proposal feature

packages/ui/src/app/GlobalModals.tsx

@@ -67,6 +67,7 @@ import { SwitchMemberModal, SwitchMemberModalCall } from '@/memberships/modals/S
 import { TransferInviteModal, TransferInvitesModalCall } from '@/memberships/modals/TransferInviteModal'
 import { UpdateMembershipModal, UpdateMembershipModalCall } from '@/memberships/modals/UpdateMembershipModal'
 import { AddNewProposalModal, AddNewProposalModalCall } from '@/proposals/modals/AddNewProposal'
+import { CancelProposalModal, CancelProposalModalCall } from '@/proposals/modals/CancelProposal'
 import { VoteForProposalModal, VoteForProposalModalCall } from '@/proposals/modals/VoteForProposal'
 import { VoteRationaleModalCall } from '@/proposals/modals/VoteRationale/types'
 import { VoteRationale } from '@/proposals/modals/VoteRationale/VoteRationale'
@@ -133,6 +134,7 @@ export type ModalNames =
   | ModalName<EmailSubscriptionModalCall>
   | ModalName<EmailConfirmationModalCall>
   | ModalName<NominatingRedirectModalCall>
+  | ModalName<CancelProposalModalCall>
 
 const modals: Record<ModalNames, ReactElement> = {
   Member: <MemberProfile />,
@@ -186,6 +188,7 @@ const modals: Record<ModalNames, ReactElement> = {
   EmailSubscriptionModal: <EmailSubscriptionModal />,
   EmailConfirmationModal: <EmailConfirmationModal />,
   NominatingRedirect: <NominatingRedirectModal />,
+  CancelProposalModal: <CancelProposalModal />,
 }
 
 const GUEST_ACCESSIBLE_MODALS: ModalNames[] = [

packages/ui/src/app/pages/Proposals/ProposalPreview.stories.tsx

@@ -51,6 +51,7 @@ type Args = {
   vote2: VoteArg
   vote3: VoteArg
   onVote: jest.Mock
+  onCancel: jest.Mock
 }
 type Story = StoryObj<FC<Args>>
 
@@ -65,6 +66,7 @@ export default {
     vote2: { control: { type: 'inline-radio' }, options: voteArgs },
     vote3: { control: { type: 'inline-radio' }, options: voteArgs },
     onVote: { action: 'ProposalsEngine.Voted' },
+    onCancel: { action: 'ProposalsEngine.Cancelled' },
   },
 
   args: {
@@ -142,6 +144,11 @@ export default {
                 onSend: args.onVote,
                 failure: parameters.txFailure,
               },
+              cancelProposal: {
+                event: 'Cancelled',
+                onSend: args.onCancel,
+                failure: parameters.txFailure,
+              },
             },
           },
         },
@@ -608,3 +615,33 @@ export const TestVoteTxFailure: Story = {
     expect(await modal.findByText('Some error message'))
   },
 }
+
+export const TestCancelProposalHappy: Story = {
+  args: { type: 'SignalProposalDetails', isCouncilMember: false, isProposer: true },
+
+  name: 'Test CancelProposal Happy',
+
+  play: async ({ canvasElement, step, args: { onCancel } }) => {
+    const activeMember = member('alice')
+
+    const screen = within(canvasElement)
+    const modal = withinModal(canvasElement)
+
+    await step('Cancel', async () => {
+      await userEvent.click(screen.getByText('Cancel Proposal'))
+
+      await step('Sign', async () => {
+        expect(await modal.findByText('Authorize transaction'))
+        expect(modal.getByText('You intend to cancel your proposal.'))
+
+        await userEvent.click(modal.getByText(/^Sign And Cancel Proposal/))
+      })
+
+      await step('Confirm', async () => {
+        expect(await modal.findByText('Your propsal has been cancelled.'))
+
+        expect(onCancel).toHaveBeenLastCalledWith(activeMember.id, PROPOSAL_DATA.id)
+      })
+    })
+  },
+}

packages/ui/src/app/pages/Proposals/ProposalPreview.tsx

@@ -23,6 +23,7 @@ import { getUrl } from '@/common/utils/getUrl'
 import { useElectedCouncil } from '@/council/hooks/useElectedCouncil'
 import { MemberInfo } from '@/memberships/components'
 import { useMyMemberships } from '@/memberships/hooks/useMyMemberships'
+import { CancelProposalButton } from '@/proposals/components/CancelProposalButton'
 import { ProposalDetails } from '@/proposals/components/ProposalDetails/ProposalDetails'
 import { ProposalDiscussions } from '@/proposals/components/ProposalDiscussions'
 import { ProposalHistory } from '@/proposals/components/ProposalHistory'
@@ -117,6 +118,11 @@ export const ProposalPreview = () => {
               <PageTitle>{proposal.title}</PageTitle>
             </PreviousPage>
             <ButtonsGroup>
+              {active?.id === proposal.proposer.id &&
+                proposal.votes.length === 0 &&
+                (proposal.status === 'deciding' || proposal.status === 'dormant') && (
+                  <CancelProposalButton member={active} proposalId={proposal.id} />
+                )}
               {active?.isCouncilMember &&
                 proposal.status === 'deciding' &&
                 (!hasVoted ? (

packages/ui/src/proposals/components/CancelProposalButton.tsx

@@ -0,0 +1,27 @@
+import React, { useCallback } from 'react'
+
+import { ButtonSecondary } from '@/common/components/buttons'
+import { useModal } from '@/common/hooks/useModal'
+import { Member } from '@/memberships/types'
+
+import { CancelProposalModalCall } from '../modals/CancelProposal'
+
+interface Props {
+  member: Member
+  proposalId: string
+}
+
+export const CancelProposalButton = ({ member, proposalId }: Props) => {
+  const { showModal } = useModal()
+  const cancelProposalModal = useCallback(() => {
+    showModal<CancelProposalModalCall>({
+      modal: 'CancelProposalModal',
+      data: { member, proposalId },
+    })
+  }, [])
+  return (
+    <ButtonSecondary onClick={cancelProposalModal} size="medium">
+      Cancel Proposal
+    </ButtonSecondary>
+  )
+}

packages/ui/src/proposals/modals/CancelProposal/CancelProposalModal.tsx

@@ -0,0 +1,70 @@
+import React, { useEffect, useMemo } from 'react'
+
+import { useTransactionFee } from '@/accounts/hooks/useTransactionFee'
+import { InsufficientFundsModal } from '@/accounts/modals/InsufficientFundsModal'
+import { useApi } from '@/api/hooks/useApi'
+import { TextMedium } from '@/common/components/typography'
+import { useMachine } from '@/common/hooks/useMachine'
+import { useModal } from '@/common/hooks/useModal'
+import { SignTransactionModal } from '@/common/modals/SignTransactionModal/SignTransactionModal'
+import { defaultTransactionModalMachine } from '@/common/model/machines/defaultTransactionModalMachine'
+
+import { CancelProposalModalCall } from './types'
+
+export const CancelProposalModal = () => {
+  const { hideModal, modalData } = useModal<CancelProposalModalCall>()
+  const { member, proposalId } = modalData
+  const machine = useMemo(
+    () =>
+      defaultTransactionModalMachine(
+        'There was a problem cancelling your proposal.',
+        'Your propsal has been cancelled.'
+      ),
+    []
+  )
+  const [state, send] = useMachine(machine, { context: { validateBeforeTransaction: true } })
+  const { api, isConnected } = useApi()
+
+  const { transaction, feeInfo } = useTransactionFee(
+    member.controllerAccount,
+    () => {
+      if (api && isConnected) {
+        return api.tx.proposalsEngine.cancelProposal(member.id, proposalId)
+      }
+    },
+    [modalData, isConnected]
+  )
+
+  useEffect(() => {
+    if (state.matches('requirementsVerification')) {
+      if (transaction && feeInfo) {
+        feeInfo.canAfford && send('PASS')
+        !feeInfo.canAfford && send('FAIL')
+      }
+    }
+
+    if (state.matches('beforeTransaction')) {
+      send(feeInfo?.canAfford ? 'PASS' : 'FAIL')
+    }
+  }, [state.value, member, transaction, feeInfo?.canAfford])
+
+  if (state.matches('transaction') && transaction && member) {
+    return (
+      <SignTransactionModal
+        buttonText="Sign And Cancel Proposal"
+        transaction={transaction}
+        signer={member.controllerAccount}
+        service={state.children.transaction}
+      >
+        <TextMedium>You intend to cancel your proposal.</TextMedium>
+      </SignTransactionModal>
+    )
+  }
+
+  if (state.matches('requirementsFailed') && member && feeInfo) {
+    return (
+      <InsufficientFundsModal onClose={hideModal} address={member.controllerAccount} amount={feeInfo.transactionFee} />
+    )
+  }
+  return null
+}

packages/ui/src/proposals/modals/CancelProposal/index.ts

@@ -0,0 +1,2 @@
+export type { CancelProposalModalCall } from './types'
+export * from './CancelProposalModal'

packages/ui/src/proposals/modals/CancelProposal/types.ts

@@ -0,0 +1,4 @@
+import { ModalWithDataCall } from '@/common/providers/modal/types'
+import { Member } from '@/memberships/types'
+
+export type CancelProposalModalCall = ModalWithDataCall<'CancelProposalModal', { member: Member; proposalId: string }>