7. Approval Flows
7. Approval Flows
// Human approval workflow
const approvalFlow = {
"displayName": "Expense Approval Workflow",
"trigger": {
"name": "webhook",
"type": "WEBHOOK",
"settings": {},
"displayName": "New Expense Request"
},
"steps": [
{
"name": "validate_expense",
"type": "CODE",
"settings": {
"input": {
"expense": "{{trigger.body}}"
},
"sourceCode": {
"code": `
export const code = async (inputs) => {
const { expense } = inputs;
return {
...expense,
requires_approval: expense.amount > 500,
approval_level: expense.amount > 5000 ? 'executive' : expense.amount > 500 ? 'manager' : 'auto',
formatted_amount: new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(expense.amount)
};
};`
}
},
"displayName": "Validate Expense"
},
{
"name": "check_approval_required",
"type": "BRANCH",
"settings": {
"conditions": [
{
"name": "needs_approval",
"expression": {
"type": "EXPRESSION",
"value": "{{validate_expense.requires_approval}} === true"
},
"steps": [
{
"name": "send_approval_request",
"type": "PIECE",
"settings": {
"pieceName": "@activepieces/piece-slack",
"actionName": "send_message",
"input": {
"channel": "#expense-approvals",
"blocks": [
{
"type": "header",
"text": {
"type": "plain_text",
"text": "Expense Approval Required"
}
},
{
"type": "section",
"fields": [
{ "type": "mrkdwn", "text": "*Submitted by:*\n{{validate_expense.employee_name}}" },
{ "type": "mrkdwn", "text": "*Amount:*\n{{validate_expense.formatted_amount}}" },
{ "type": "mrkdwn", "text": "*Category:*\n{{validate_expense.category}}" },
{ "type": "mrkdwn", "text": "*Description:*\n{{validate_expense.description}}" }
]
},
{
"type": "actions",
"elements": [
{
"type": "button",
"text": { "type": "plain_text", "text": "Approve" },
"style": "primary",
"action_id": "approve_expense",
"value": "{{validate_expense.id}}"
},
{
"type": "button",
"text": { "type": "plain_text", "text": "Reject" },
"style": "danger",
"action_id": "reject_expense",
"value": "{{validate_expense.id}}"
}
]
}
]
}
}
},
{
"name": "wait_for_approval",
"type": "PIECE",
"settings": {
"pieceName": "@activepieces/piece-approval",
"actionName": "wait_for_approval",
"input": {
"timeout_hours": 48,
"approval_link_text": "Click to review expense"
}
}
},
{
"name": "process_decision",
"type": "BRANCH",
"settings": {
"conditions": [
{
"name": "approved",
"expression": {
"type": "EXPRESSION",
"value": "{{wait_for_approval.status}} === 'APPROVED'"
},
"steps": [
{
"name": "process_reimbursement",
"type": "PIECE",
"settings": {
"pieceName": "@activepieces/piece-http",
"actionName": "send_request",
"input": {
"method": "POST",
"url": "{{connections.finance_api.base_url}}/reimbursements",
"body": {
"expense_id": "{{validate_expense.id}}",
"amount": "{{validate_expense.amount}}",
"employee_id": "{{validate_expense.employee_id}}",
"approved_by": "{{wait_for_approval.approved_by}}"
}
}
}
}
]
},
{
"name": "rejected",
"expression": {
"type": "EXPRESSION",
"value": "{{wait_for_approval.status}} === 'REJECTED'"
},
"steps": [
{
"name": "notify_rejection",
"type": "PIECE",
"settings": {
"pieceName": "@activepieces/piece-gmail",
"actionName": "send_email",
"input": {
"to": "{{validate_expense.employee_email}}",
"subject": "Expense Request Rejected",
"body": "Your expense request for {{validate_expense.formatted_amount}} has been rejected."
}
}
}
]
}
]
}
}
]
},
{
"name": "auto_approve",
"expression": {
"type": "EXPRESSION",
"value": "{{validate_expense.requires_approval}} === false"
},
"steps": [
{
"name": "auto_process",
"type": "PIECE",
"settings": {
"pieceName": "@activepieces/piece-http",
"actionName": "send_request",
"input": {
"method": "POST",
"url": "{{connections.finance_api.base_url}}/reimbursements",
"body": {
"expense_id": "{{validate_expense.id}}",
"amount": "{{validate_expense.amount}}",
*Content truncated — see parent skill for full reference.*
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