All files / tenants remove-member.js

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100% Branches 13/13
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const { DynamoDBClient } = require('@aws-sdk/client-dynamodb')
const { DynamoDBDocumentClient, GetCommand, DeleteCommand } = require('@aws-sdk/lib-dynamodb')
 
const client = new DynamoDBClient({})
const docClient = DynamoDBDocumentClient.from(client)
 
exports.handler = async (event) => {
  try {
    const tenantId = event.pathParameters?.tenantId
    const targetUserId = event.pathParameters?.userId
    const currentUserId = event.requestContext?.authorizer?.claims?.sub
 
    if (!currentUserId || !tenantId || !targetUserId) {
      return {
        statusCode: 401,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Unauthorized' })
      }
    }
 
    // Get tenant info to check ownership
    const tenant = await docClient.send(
      new GetCommand({
        TableName: process.env.TENANTS_TABLE_NAME,
        Key: { id: tenantId }
      })
    )
 
    if (!tenant.Item) {
      return {
        statusCode: 404,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Tenant not found' })
      }
    }
 
    // Check authorization: user can remove themselves, or owner can remove anyone
    const isOwner = tenant.Item.ownerId === currentUserId
    const isSelf = targetUserId === currentUserId
 
    if (!isOwner && !isSelf) {
      return {
        statusCode: 403,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({
          error: 'Only the owner or the user themselves can remove this membership'
        })
      }
    }
 
    // Prevent owner from removing themselves
    if (tenant.Item.ownerId === targetUserId) {
      return {
        statusCode: 400,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Owner cannot be removed from tenant' })
      }
    }
 
    // Delete from MEMBERSHIPS_TABLE
    await docClient.send(
      new DeleteCommand({
        TableName: process.env.MEMBERSHIPS_TABLE_NAME,
        Key: { userId: targetUserId, tenantId }
      })
    )
 
    return {
      statusCode: 200,
      headers: {
        'Content-Type': 'application/json',
        'Access-Control-Allow-Origin': '*'
      },
      body: JSON.stringify({ message: 'Membership removed successfully' })
    }
  } catch (error) {
    console.error('Error removing member:', error)
    return {
      statusCode: 500,
      headers: {
        'Content-Type': 'application/json',
        'Access-Control-Allow-Origin': '*'
      },
      body: JSON.stringify({ error: 'Failed to remove member' })
    }
  }
}