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const { DynamoDBDocumentClient, GetCommand, UpdateCommand } = require('@aws-sdk/lib-dynamodb')
const { requirePermission } = require('../utils/requirePermission')
const { RESERVED_ENTITY_IDS } = require('../utils/constants')
const { validateWorkflowFields } = require('../utils/validateWorkflowFields')
const { validateFieldNames } = require('../utils/validateFieldNames')
const { resolveForms } = require('../utils/resolveEntityForms')
const client = new DynamoDBClient({})
const docClient = DynamoDBDocumentClient.from(client)
const updateEntityHandler = async (event) => {
try {
const id = event.pathParameters?.entityId
const body = JSON.parse(event.body || '{}')
const flowId = event.requestContext?.authorizer?.claims?.['custom:flowId']
if (!flowId) {
return {
statusCode: 401,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({ error: 'Missing flow context' })
}
}
if (!id) {
return {
statusCode: 400,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({ error: 'Missing id' })
}
}
// Prevent modification of system entities
if (RESERVED_ENTITY_IDS.includes(id)) {
return {
statusCode: 403,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({
error: `Cannot modify system entity "${id}". System entities are read-only.`
})
}
}
// Verify entity exists and ownership
const result = await docClient.send(
new GetCommand({
TableName: process.env.TABLE_NAME,
Key: { id }
})
)
if (!result.Item) {
return {
statusCode: 404,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({ error: 'Entity not found' })
}
}
// Only owner flow can update
if (result.Item.flowId !== flowId) {
return {
statusCode: 403,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({ error: 'Access denied - only owner can update' })
}
}
// Build update expression
const updateExpressions = []
const expressionAttributeNames = {}
const expressionAttributeValues = {}
if (body.name !== undefined) {
updateExpressions.push('#name = :name')
expressionAttributeNames['#name'] = 'name'
expressionAttributeValues[':name'] = body.name
}
if (body.fields !== undefined) {
// Validate workflow fields: each workflow field must have a valid startStateId
const workflowValidation = validateWorkflowFields(body.fields)
Iif (!workflowValidation.valid) return workflowValidation.errorResponse
// Validate field names: every field must have a non-empty name
const fieldNameValidation = validateFieldNames(body.fields)
if (!fieldNameValidation.valid) return fieldNameValidation.errorResponse
updateExpressions.push('#fields = :fields')
expressionAttributeNames['#fields'] = 'fields'
expressionAttributeValues[':fields'] = body.fields
}
if (body.forms !== undefined) {
if (body.forms === null || (Array.isArray(body.forms) && body.forms.length === 0)) {
updateExpressions.push('REMOVE #forms')
expressionAttributeNames['#forms'] = 'forms'
} else E{
const forms = resolveForms({
fields: body.fields !== undefined ? body.fields : result.Item.fields,
forms: body.forms
})
updateExpressions.push('#forms = :forms')
expressionAttributeNames['#forms'] = 'forms'
expressionAttributeValues[':forms'] = forms || body.forms
}
} else Eif (
body.fields !== undefined ||
!Array.isArray(result.Item.forms) ||
result.Item.forms.length === 0 ||
!result.Item.forms.some((form) => form?.purpose === 'short')
) {
const forms = resolveForms({
fields: body.fields !== undefined ? body.fields : result.Item.fields,
forms: result.Item.forms
})
if (forms) {
updateExpressions.push('#forms = :forms')
expressionAttributeNames['#forms'] = 'forms'
expressionAttributeValues[':forms'] = forms
}
}
if (body.visibility !== undefined) {
const validVisibilityLevels = ['flow-members', 'public']
if (!validVisibilityLevels.includes(body.visibility)) {
return {
statusCode: 400,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({
error: `Invalid visibility level. Must be one of: ${validVisibilityLevels.join(', ')}`
})
}
}
updateExpressions.push('#visibility = :visibility')
expressionAttributeNames['#visibility'] = 'visibility'
expressionAttributeValues[':visibility'] = body.visibility
}
if (
body.publicPermissions !== undefined &&
(body.visibility === 'public' || result.Item.visibility === 'public')
) {
updateExpressions.push('#publicPermissions = :publicPermissions')
expressionAttributeNames['#publicPermissions'] = 'publicPermissions'
expressionAttributeValues[':publicPermissions'] = body.publicPermissions
}
if (body.picture !== undefined) {
if (body.picture === null || body.picture === '') {
// Remove picture
updateExpressions.push('REMOVE #picture')
expressionAttributeNames['#picture'] = 'picture'
} else {
updateExpressions.push('#picture = :picture')
expressionAttributeNames['#picture'] = 'picture'
expressionAttributeValues[':picture'] = body.picture
}
}
if (body.icon !== undefined) {
if (body.icon === null || body.icon === '') {
// Remove icon
updateExpressions.push('REMOVE #icon')
expressionAttributeNames['#icon'] = 'icon'
} else {
updateExpressions.push('#icon = :icon')
expressionAttributeNames['#icon'] = 'icon'
expressionAttributeValues[':icon'] = body.icon
}
}
Iif (body.description !== undefined) {
if (body.description === null || body.description === '') {
// Remove description
updateExpressions.push('REMOVE #description')
expressionAttributeNames['#description'] = 'description'
} else {
updateExpressions.push('#description = :description')
expressionAttributeNames['#description'] = 'description'
expressionAttributeValues[':description'] = body.description
}
}
if (body.defaultLanguage !== undefined) {
updateExpressions.push('#defaultLanguage = :defaultLanguage')
expressionAttributeNames['#defaultLanguage'] = 'defaultLanguage'
expressionAttributeValues[':defaultLanguage'] = body.defaultLanguage
}
if (body.enabledLanguages !== undefined) {
updateExpressions.push('#enabledLanguages = :enabledLanguages')
expressionAttributeNames['#enabledLanguages'] = 'enabledLanguages'
expressionAttributeValues[':enabledLanguages'] = body.enabledLanguages
}
if (updateExpressions.length === 0) {
return {
statusCode: 400,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({ error: 'No fields to update' })
}
}
updateExpressions.push('#updatedAt = :updatedAt')
expressionAttributeNames['#updatedAt'] = 'updatedAt'
expressionAttributeValues[':updatedAt'] = new Date().toISOString()
const updateResult = await docClient.send(
new UpdateCommand({
TableName: process.env.TABLE_NAME,
Key: { id },
UpdateExpression: 'SET ' + updateExpressions.join(', '),
ExpressionAttributeNames: expressionAttributeNames,
ExpressionAttributeValues: expressionAttributeValues,
ReturnValues: 'ALL_NEW'
})
)
return {
statusCode: 200,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify(updateResult.Attributes)
}
} catch (error) {
console.error('Error:', error)
return {
statusCode: 500,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
},
body: JSON.stringify({ error: 'Failed to update entity' })
}
}
}
// Wrap with permission check: require 'entity-{id}:update' permission
exports.handler = requirePermission(updateEntityHandler, {
permission: (event) => `entity-${event.pathParameters?.entityId}:update`
})
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