From 653c4139687fab43ff514426bc5c271308ec0a96 Mon Sep 17 00:00:00 2001
From: Aaron Cox <aaron.cox@greymass.com>
Date: Wed, 13 Dec 2017 19:08:20 -0500
Subject: [PATCH] Added a message about overwriting delegations within prompts

Fixes #57
---
 app/components/sign/operations/prompt.js      |  2 +-
 .../sign/operations/types/delegation.js       | 19 +++++++++++++++++++
 app/containers/PromptOperation.js             |  3 ++-
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/app/components/sign/operations/prompt.js b/app/components/sign/operations/prompt.js
index 03c36f6..8fa39d2 100644
--- a/app/components/sign/operations/prompt.js
+++ b/app/components/sign/operations/prompt.js
@@ -202,7 +202,7 @@ export default class OperationsPrompt extends Component {
         case 'delegate_vesting_shares':
           return [
             <Header attached='top' key='op-header'><Icon name='power' />Delegate Steem Power</Header>,
-            <OperationsPromptDelegation opData={opData} steem={this.props.steem} />
+            <OperationsPromptDelegation account={this.props.account} opData={opData} steem={this.props.steem} />
           ]
         case 'transfer':
           return [
diff --git a/app/components/sign/operations/types/delegation.js b/app/components/sign/operations/types/delegation.js
index 01d22f7..0b93b01 100644
--- a/app/components/sign/operations/types/delegation.js
+++ b/app/components/sign/operations/types/delegation.js
@@ -19,6 +19,24 @@ export default class OperationsPromptDelegation extends Component {
     const totalVestsSteem = parseFloat(this.props.steem.props.total_vesting_fund_steem.split(" ")[0])
     const totalVests = parseFloat(this.props.steem.props.total_vesting_shares.split(" ")[0])
     const sp = (vests > 0) ? (totalVestsSteem * vests / totalVests).toFixed(3) : 0
+    let existingDelegation = 0
+    let existingDelegationWarning = false
+    if (this.props.account.vestingDelegations && this.props.account.vestingDelegations[opData.delegator]) {
+      const existingDelegations = this.props.account.vestingDelegations[opData.delegator]
+      existingDelegation = existingDelegations.reduce((a, b) => (b.delegator === opData.delegator && b.delegatee === opData.delegatee) ? a + parseFloat(b.vesting_shares.split(" ")[0]) : 0, 0)
+      if(existingDelegation > 0) {
+        const existingSp = (existingDelegation * vests / totalVests).toFixed(3)
+        existingDelegationWarning = (
+          <Grid.Row columns={1}>
+            <Grid.Column>
+              <Message info>
+                A delegation of <strong>{existingSp} SP</strong> ({existingDelegation} VESTS) is already active from <AccountName name={opData.delegator}/> to <AccountName name={opData.delegatee}/>. This new delegation will <strong>overwrite</strong> the existing delegation (not add to it).
+              </Message>
+            </Grid.Column>
+          </Grid.Row>
+        )
+      }
+    }
     const numberFormat = {
       shortFormat: true,
       shortFormatMinValue: 1000
@@ -67,6 +85,7 @@ export default class OperationsPromptDelegation extends Component {
               </Header>
             </Grid.Column>
           </Grid.Row>
+          {existingDelegationWarning}
         </Grid>
       </Segment>
     )
diff --git a/app/containers/PromptOperation.js b/app/containers/PromptOperation.js
index 366883f..af07ea9 100644
--- a/app/containers/PromptOperation.js
+++ b/app/containers/PromptOperation.js
@@ -124,9 +124,10 @@ class PromptOperation extends Component {
 
   render() {
     const { ops, meta } = this.state
-    const { keys } = this.props
+    const { account, keys } = this.props
     return (
       <OperationsPrompt
+        account={account}
         accounts={keys.names}
         accountChange={this.modifyOpsByAccount.bind(this)}
         meta={meta}