All files / items lookup-form.js

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74.07% Branches 40/54
100% Functions 14/14
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const { DynamoDBClient } = require('@aws-sdk/client-dynamodb')
const { DynamoDBDocumentClient, BatchGetCommand, GetCommand } = require('@aws-sdk/lib-dynamodb')
const { authenticateRequest, hasPermission, canAccessEntity } = require('../shared/auth-helper')
 
const client = new DynamoDBClient({})
const docClient = DynamoDBDocumentClient.from(client)
 
function parseRequestBody(body) {
  Iif (!body) return {}
  if (typeof body === 'string') {
    try {
      return JSON.parse(body)
    } catch {
      throw new Error('Invalid JSON body')
    }
  }
  if (typeof body === 'object') return body
  return {}
}
 
exports.handler = async (event) => {
  try {
    const auth = await authenticateRequest(event)
 
    if (!auth || auth.error) {
      return {
        statusCode: 401,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: auth?.error || 'Authentication required' })
      }
    }
 
    if (!hasPermission(auth, 'items:read')) {
      return {
        statusCode: 403,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Permission denied: items:read required' })
      }
    }
 
    const entityId = event.pathParameters?.entityId
    if (!entityId) {
      return {
        statusCode: 400,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Missing entityId' })
      }
    }
 
    let payload
    try {
      payload = parseRequestBody(event.body)
    } catch (error) {
      return {
        statusCode: 400,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: error.message })
      }
    }
 
    const ids = Array.isArray(payload.ids) ? payload.ids.filter((id) => typeof id === 'string') : []
    const formId = typeof payload.formId === 'string' ? payload.formId.trim() : ''
 
    if (!ids.length) {
      return {
        statusCode: 400,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'ids array is required' })
      }
    }
 
    if (!formId) {
      return {
        statusCode: 400,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'formId is required' })
      }
    }
 
    if (ids.length > 100) {
      return {
        statusCode: 400,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'ids array exceeds max size of 100' })
      }
    }
 
    const uniqueIds = [...new Set(ids)]
 
    const entityResult = await docClient.send(
      new GetCommand({
        TableName: process.env.ENTITIES_TABLE_NAME,
        Key: { id: entityId }
      })
    )
 
    Iif (!entityResult.Item) {
      return {
        statusCode: 404,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Entity not found' })
      }
    }
 
    if (!canAccessEntity(auth, entityResult.Item)) {
      return {
        statusCode: 403,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Access denied to this entity' })
      }
    }
 
    const forms = Array.isArray(entityResult.Item.forms) ? entityResult.Item.forms : []
    const targetForm = forms.find((form) => form?.id === formId)
    if (!targetForm) {
      return {
        statusCode: 404,
        headers: {
          'Content-Type': 'application/json',
          'Access-Control-Allow-Origin': '*'
        },
        body: JSON.stringify({ error: 'Form not found' })
      }
    }
 
    const formFieldIds = Array.isArray(targetForm.fields)
      ? [...targetForm.fields]
          .sort((a, b) => (a?.order ?? 0) - (b?.order ?? 0))
          .map((placement) => placement?.fieldId)
          .filter((fieldId) => typeof fieldId === 'string' && fieldId)
      : []
 
    const flowId =
      entityResult.Item.visibility === 'public'
        ? entityResult.Item.flowId
        : auth.type === 'apikey' && (auth.allowedEntityIds || []).includes('*')
          ? entityResult.Item.flowId
          : auth.flowId
 
    const keys = uniqueIds.map((id) => ({ entityId, id }))
    const batchResult = await docClient.send(
      new BatchGetCommand({
        RequestItems: {
          [process.env.TABLE_NAME]: {
            Keys: keys
          }
        }
      })
    )
 
    const rawItems = batchResult.Responses?.[process.env.TABLE_NAME] || []
    const visibleItems = rawItems.filter((item) => item.flowId === flowId)
    const itemById = new Map(visibleItems.map((item) => [item.id, item]))
 
    const projectedItems = uniqueIds
      .map((id) => itemById.get(id))
      .filter(Boolean)
      .map((item) => {
        const values = {}
        for (const fieldId of formFieldIds) {
          Eif (item[fieldId] !== undefined) {
            values[fieldId] = item[fieldId]
          }
        }
        return { id: item.id, values }
      })
 
    const projectedItemIds = new Set(projectedItems.map((item) => item.id))
    const missingIds = uniqueIds.filter((id) => !projectedItemIds.has(id))
 
    return {
      statusCode: 200,
      headers: {
        'Content-Type': 'application/json',
        'Access-Control-Allow-Origin': '*'
      },
      body: JSON.stringify({
        items: projectedItems,
        missingIds
      })
    }
  } catch (error) {
    console.error('Error looking up items by form:', error)
    return {
      statusCode: 500,
      headers: {
        'Content-Type': 'application/json',
        'Access-Control-Allow-Origin': '*'
      },
      body: JSON.stringify({ error: 'Failed to lookup items by form' })
    }
  }
}