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BlogPost-Infra-CFN.json
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{
"AWSTemplateFormatVersion": "2010-09-09",
"Metadata": {},
"Parameters": {
"PyPhoneticsLayerBucketName": {
"Description": "Name of the S3 bucket you have deployed the PyPhonetics Layer file to.",
"Type": "String",
"ConstraintDescription": "Must be a valid bucket name."
},
"BucketName": {
"Description": "Name of the S3 bucket you will deploy the Names CSV file to.",
"Type": "String",
"ConstraintDescription": "Must be a valid bucket name."
}
},
"Resources": {
"NamesTable": {
"Type": "AWS::DynamoDB::Table",
"Properties": {
"TableName": "NamesTable",
"BillingMode": "PAY_PER_REQUEST",
"AttributeDefinitions": [
{
"AttributeName": "ID",
"AttributeType": "S"
}
],
"KeySchema": [
{
"AttributeName": "ID",
"KeyType": "HASH"
}
],
"StreamSpecification": {
"StreamViewType": "NEW_AND_OLD_IMAGES"
},
"Tags": [
{
"Key": "Name",
"Value": "NamesTable"
}
]
}
},
"FirstNameToBiGramIndex": {
"Type": "AWS::DynamoDB::Table",
"Properties": {
"TableName": "FirstNameToBiGramIndex",
"BillingMode": "PAY_PER_REQUEST",
"AttributeDefinitions": [
{
"AttributeName": "bigram",
"AttributeType": "S"
}
],
"KeySchema": [
{
"AttributeName": "bigram",
"KeyType": "HASH"
}
],
"Tags": [
{
"Key": "Name",
"Value": "FirstNameToBiGramIndex"
}
]
}
},
"LastNameToBiGramIndex": {
"Type": "AWS::DynamoDB::Table",
"Properties": {
"TableName": "LastNameToBiGramIndex",
"BillingMode": "PAY_PER_REQUEST",
"AttributeDefinitions": [
{
"AttributeName": "bigram",
"AttributeType": "S"
}
],
"KeySchema": [
{
"AttributeName": "bigram",
"KeyType": "HASH"
}
],
"Tags": [
{
"Key": "Name",
"Value": "LastNameToBiGramIndex"
}
]
}
},
"LambdaRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"lambda.amazonaws.com",
"s3.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/",
"ManagedPolicyArns": [
"arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole",
"arn:aws:iam::aws:policy/AWSLambdaInvocation-DynamoDB",
"arn:aws:iam::aws:policy/AmazonS3ReadOnlyAccess"
],
"Policies": [
{
"PolicyName": "policyname",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Resource": "*",
"Action": [
"dynamodb:PutItem",
"dynamodb:BatchWriteItem"
]
}
]
}
}
]
}
},
"myNamesBlogPostNameToBiGram": {
"Type": "AWS::Lambda::Function",
"DependsOn": [
"DDBTriggerLambdaRole"
],
"Properties": {
"Handler": "index.lambda_handler",
"Role": {
"Fn::GetAtt": [
"DDBTriggerLambdaRole",
"Arn"
]
},
"Code": {
"ZipFile": {
"Fn::Join": [
"\n",
[
"import json",
"import boto3",
"import boto3.dynamodb.conditions as conditions",
"import time",
"",
"dynamodb = boto3.resource('dynamodb')",
"",
"def toBigrams(str):",
" grams = []",
" for i in enumerate(str):",
" for j in enumerate(str[i[0] + 1:]):",
" if i[1] == ' ' or j[1] == ' ':",
" continue",
"",
" target_gram = '({0},{1})'.format(i[1], j[1])",
" if target_gram not in grams:",
" grams.append(target_gram)",
"",
" return grams",
"",
"",
"def writeBigrams(name, bigrams, tableName):",
" nameBiGramIndex = dynamodb.Table(tableName)",
" for g in bigrams:",
" nameBiGramIndex.update_item(",
" Key={",
" 'bigram': f'{g}',",
" },",
" UpdateExpression='ADD #names :n',",
" ExpressionAttributeNames={",
" '#names': 'names',",
" },",
" ExpressionAttributeValues={",
" ':n': {name.lower()}",
" })",
"",
"",
"def lambda_handler(event, context):",
" #print('DynamoDB Record: ' + json.dumps(event, indent=2))",
"",
" for record in event['Records']:",
" if record['eventName'] == 'INSERT':",
" time.sleep(0.25)",
" firstName = record['dynamodb']['NewImage']['FirstName']['S']",
" lastName = record['dynamodb']['NewImage']['LastName']['S']",
" firstNameGrams = toBigrams(firstName.lower())",
" lastNameGrams = toBigrams(lastName.lower())",
" writeBigrams(firstName, firstNameGrams, 'FirstNameToBiGramIndex')",
" writeBigrams(lastName, lastNameGrams, 'LastNameToBiGramIndex')",
" print('Successfully processed {} records.'.format(len(event['Records'])))",
" return 'Successfully processed {} records.'.format(len(event['Records']))"
]
]
}
},
"Runtime": "python3.9",
"Timeout": 900,
"MemorySize": 1024,
"Environment": {
}
}
},
"CsvToDDBLambdaFunction": {
"Type": "AWS::Lambda::Function",
"Properties": {
"Handler": "index.lambda_handler",
"Role": {
"Fn::GetAtt": [
"LambdaRole",
"Arn"
]
},
"Code": {
"ZipFile": {
"Fn::Join": [
"\n",
[
"import json",
"import boto3",
"import os",
"import csv",
"import codecs",
"import sys",
"",
"s3 = boto3.resource('s3')",
"dynamodb = boto3.resource('dynamodb')",
"",
"bucket = os.environ['bucket']",
"tableName = os.environ['table']",
"",
"",
"def lambda_handler(event, context):",
" print('DynamoDB Record: ' + json.dumps(event, indent=2))",
" for record in event['Records']:",
" key = record['s3']['object']['key']",
" print(f'Bucket: {bucket}')",
" print(f'Key: {key}')",
" # get() does not store in memory",
" try:",
" obj = s3.Object(bucket, key).get()['Body']",
" except:",
" print('S3 Object could not be opened. Check environment variable. ')",
"",
" batch_size = 100",
" batch = []",
"",
" # DictReader is a generator; not stored in memory",
" for row in csv.DictReader(codecs.getreader('utf-8')(obj)):",
" if len(batch) >= batch_size:",
" write_to_dynamo(batch)",
" batch.clear()",
"",
" batch.append(row)",
"",
" if batch:",
" write_to_dynamo(batch)",
"",
" return {",
" 'statusCode': 200,",
" 'body': json.dumps('Uploaded to DynamoDB Table')",
" }",
"",
"",
"def write_to_dynamo(rows):",
" try:",
" table = dynamodb.Table(tableName)",
" except:",
" print('Error loading DynamoDB table. Check if table was created correctly and environment variable.')",
"",
" try:",
" with table.batch_writer() as batch:",
" for i in range(len(rows)):",
" batch.put_item(",
" Item=rows[i]",
" )",
" except:",
" print('Error executing batch_writer')"
]
]
}
},
"Runtime": "python3.7",
"Timeout": 900,
"MemorySize": 3008,
"Environment": {
"Variables": {
"bucket": {
"Ref": "BucketName"
},
"key": "names.csv",
"table": "NamesTable"
}
}
}
},
"S3Bucket": {
"DependsOn": [
"CsvToDDBLambdaFunction",
"BucketPermission"
],
"Type": "AWS::S3::Bucket",
"Properties": {
"BucketName": {
"Ref": "BucketName"
},
"AccessControl": "BucketOwnerFullControl",
"NotificationConfiguration": {
"LambdaConfigurations": [
{
"Event": "s3:ObjectCreated:*",
"Function": {
"Fn::GetAtt": [
"CsvToDDBLambdaFunction",
"Arn"
]
}
}
]
}
}
},
"BucketPermission": {
"Type": "AWS::Lambda::Permission",
"Properties": {
"Action": "lambda:InvokeFunction",
"FunctionName": {
"Ref": "CsvToDDBLambdaFunction"
},
"Principal": "s3.amazonaws.com",
"SourceAccount": {
"Ref": "AWS::AccountId"
}
}
},
"DDBTriggerLambdaRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"lambda.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/",
"Policies": [
{
"PolicyName": "DDBTriggerLambdaRolePolicy",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Resource": "arn:aws:logs:*:*:*",
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
]
},
{
"Effect": "Allow",
"Resource": "arn:aws:dynamodb:*:*:table/NamesTable*",
"Action": [
"dynamodb:DescribeStream",
"dynamodb:GetRecords",
"dynamodb:GetShardIterator",
"dynamodb:ListStreams",
"dynamodb:ListShards",
"dynamodb:BatchGetItem",
"dynamodb:PutItem",
"dynamodb:BatchWriteItem",
"dynamodb:GetItem",
"dynamodb:DeleteItem",
"dynamodb:UpdateItem"
]
},
{
"Effect": "Allow",
"Resource": "arn:aws:dynamodb:*:*:table/*ToBiGramIndex",
"Action": [
"dynamodb:DescribeStream",
"dynamodb:GetRecords",
"dynamodb:GetShardIterator",
"dynamodb:ListStreams",
"dynamodb:ListShards",
"dynamodb:BatchGetItem",
"dynamodb:PutItem",
"dynamodb:BatchWriteItem",
"dynamodb:GetItem",
"dynamodb:DeleteItem",
"dynamodb:UpdateItem"
]
}
]
}
}
]
}
},
"DataTableStream": {
"Type": "AWS::Lambda::EventSourceMapping",
"Properties": {
"BatchSize": "100",
"StartingPosition": "LATEST",
"Enabled": "True",
"EventSourceArn": {
"Fn::GetAtt": [
"NamesTable",
"StreamArn"
]
},
"FunctionName": {
"Fn::GetAtt": [
"myNamesBlogPostNameToBiGram",
"Arn"
]
},
"StartingPosition": "LATEST"
}
},
"BotRole" : {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"lexv2.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/",
"Policies": [{
"PolicyName": "LexRuntimeRolePolicy",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": {
"Effect": "Allow",
"Action": [
"polly:SynthesizeSpeech", "comprehend:DetectSentiment", "lambda:invokeFunction"
],
"Resource": "*"
}
}
}]
}
},
"NameMatchToDirectoryBot": {
"Type": "AWS::Lex::Bot",
"Properties": {
"Name": "NameMatchToDirectoryBot",
"RoleArn": {"Fn::GetAtt": [ "BotRole", "Arn" ]},
"DataPrivacy": {
"ChildDirected": "false"
},
"IdleSessionTTLInSeconds": "300",
"AutoBuildBotLocales": "true",
"BotLocales": [
{
"LocaleId": "en_US",
"Description": "Bot for the Names matching against a Directory Blog Post.",
"NluConfidenceThreshold": 0.5,
"VoiceSettings": {
"VoiceId": "Ivy"
},
"Intents": [
{
"Name": "NameIntent",
"FulfillmentCodeHook": {"Enabled": "true"},
"DialogCodeHook": {"Enabled": "true"},
"SampleUtterances": [
{
"Utterance": "I am ready"
},
{
"Utterance": "ready"
},
{
"Utterance": "start"
}
],
"Slots": [
{
"Name": "FirstNameSlot",
"SlotTypeName": "AMAZON.FirstName",
"ValueElicitationSetting": {
"SlotConstraint": "Required",
"PromptSpecification": {
"MessageGroupsList": [{
"Message": {
"PlainTextMessage": {
"Value": "What is your first name?"
}
}
}],
"MaxRetries": "3",
"AllowInterrupt": "false"
}
}
},
{
"Name": "LastNameSlot",
"SlotTypeName": "AMAZON.LastName",
"ValueElicitationSetting": {
"SlotConstraint": "Required",
"PromptSpecification": {
"MessageGroupsList": [{
"Message": {
"PlainTextMessage": {
"Value": "What is your last name?"
}
}
}],
"MaxRetries": "3",
"AllowInterrupt": "false"
}
}
}
],
"SlotPriorities": [
{
"Priority": 1,
"SlotName": "FirstNameSlot"
},
{
"Priority": 2,
"SlotName": "LastNameSlot"
}
]
},
{
"Name": "FallbackIntent",
"Description": "Default intent when no other intent matches",
"ParentIntentSignature": "AMAZON.FallbackIntent"
}
]
}
],
"BotTags": [],
"TestBotAliasTags": []
}
},
"BotLambdaPermission": {
"Type": "AWS::Lambda::Permission",
"Properties": {
"FunctionName": {"Fn::GetAtt": [ "NameMatchLambda", "Arn" ]},
"Action": "lambda:InvokeFunction",
"Principal": "lexv2.amazonaws.com",
"SourceArn": {
"Fn::Join": [
"",
[
"arn:aws:lex:",
{
"Ref": "AWS::Region"
},
":",
{
"Ref": "AWS::AccountId"
},
":bot-alias/",
{
"Fn::GetAtt": [
"NameMatchToDirectoryBot",
"Id"
]
},
"/TSTALIASID"
]
]
}
}
},
"PyPhoneticsLayer" : {
"Type": "AWS::Lambda::LayerVersion",
"Properties" : {
"CompatibleArchitectures" : ["x86_64"],
"CompatibleRuntimes": ["python3.9", "python3.8", "python3.7", "python3.6"],
"Description": "PyPhonetics Layer for Names Blog Post",
"LayerName": "NamesBlogPostPyPhoneticsLayer",
"Content": {
"S3Bucket": {
"Ref": "PyPhoneticsLayerBucketName"
},
"S3Key": "PyPhoneticsLayer.zip"
}
}
},
"NameMatchLambdaRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"Description": "Name Match Blog Post Lambda Role. Enables access to DDB, CW, etc.",
"MaxSessionDuration": 3600,
"Path": "/",
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"lambda.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Policies": [
{
"PolicyName": "NameMatchLambdaPolicy",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"application-autoscaling:DescribeScalableTargets",
"application-autoscaling:DescribeScalingActivities",
"application-autoscaling:DescribeScalingPolicies",
"cloudwatch:DescribeAlarmHistory",
"cloudwatch:DescribeAlarms",
"cloudwatch:DescribeAlarmsForMetric",
"cloudwatch:GetMetricStatistics",
"cloudwatch:ListMetrics",
"cloudwatch:GetMetricData",
"datapipeline:DescribeObjects",
"datapipeline:DescribePipelines",
"datapipeline:GetPipelineDefinition",
"datapipeline:ListPipelines",
"datapipeline:QueryObjects",
"dynamodb:BatchGetItem",
"dynamodb:Describe*",
"dynamodb:List*",
"dynamodb:GetItem",
"dynamodb:Query",
"dynamodb:Scan",
"dynamodb:PartiQLSelect",
"dax:Describe*",
"dax:List*",
"dax:GetItem",
"dax:BatchGetItem",
"dax:Query",
"dax:Scan",
"ec2:DescribeVpcs",
"ec2:DescribeSubnets",
"ec2:DescribeSecurityGroups",
"iam:GetRole",
"iam:ListRoles",
"kms:DescribeKey",
"kms:ListAliases",
"sns:ListSubscriptionsByTopic",
"sns:ListTopics",
"lambda:ListFunctions",
"lambda:ListEventSourceMappings",
"lambda:GetFunctionConfiguration",
"resource-groups:ListGroups",
"resource-groups:ListGroupResources",
"resource-groups:GetGroup",
"resource-groups:GetGroupQuery",
"tag:GetResources",
"kinesis:ListStreams",
"kinesis:DescribeStream",
"kinesis:DescribeStreamSummary"
],
"Effect": "Allow",
"Resource": "*"
},
{
"Action": "cloudwatch:GetInsightRuleReport",
"Effect": "Allow",
"Resource": "arn:aws:cloudwatch:*:*:insight-rule/DynamoDBContributorInsights*"
}
]
}
},
{
"PolicyName": "NameMatchLambdaLoggingPolicy",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "logs:CreateLogGroup",
"Resource": {
"Fn::Join": [
"",
[
"arn:aws:logs:",
{
"Ref": "AWS::Region"
},
":",
{
"Ref": "AWS::AccountId"
},
":*"
]
]
}
},
{
"Effect": "Allow",
"Action": [
"logs:CreateLogStream",
"logs:PutLogEvents"
],
"Resource": [{
"Fn::Join": [
"",
[
"arn:aws:logs:",
{
"Ref": "AWS::Region"
},
":",
{
"Ref": "AWS::AccountId"
},
":log-group:/aws/lambda/*"
]
]
}]
}
]
}
}
]
}
},
"NameMatchLambda": {
"DependsOn": [
"PyPhoneticsLayer"
],
"Type" : "AWS::Lambda::Function",
"Properties": {
"Handler": "index.lambda_handler",
"Architectures": ["x86_64"],
"Runtime": "python3.9",
"Code": {
"ZipFile": {
"Fn::Join":
[
"\n",
[
"'''",
"This lambda function is part of the Names Matching Blog Post for AWS Lex.",
"'''",
"import boto3",
"from boto3.dynamodb.conditions import Attr",
"import time",
"import os",
"import logging",
"import distutils",
"import distutils.util",
"from pyphonetics import Soundex",
"from pyphonetics.distance_metrics import levenshtein_distance",
"",
"logger = logging.getLogger()",
"logger.setLevel(logging.INFO)",
"",
"dynamodb = boto3.resource('dynamodb')",
"dynamodbClient = boto3.client('dynamodb')",
"",
"LEVENSHTEIN_THRESHOLD = 2",
"",
"",
"def toBigrams(str):",
" grams = []",
" for i in enumerate(str):",
" for j in enumerate(str[i[0] + 1:]):",
" if i[1] == ' ' or j[1] == ' ':",
" continue",
"",
" target_gram = '({0},{1})'.format(i[1], j[1])",
" if target_gram not in grams:",
" grams.append(target_gram)",
"",
" return grams",
"",
"",
"def query_possible_matches(biGrams, biGramIndexTableName):",
" biGramString = ','.join('\\'{}\\''.format(value) for value in biGrams) # flatten list into string",
" statement = f'SELECT \"names\" FROM {biGramIndexTableName} WHERE bigram IN [{biGramString}]'",
" response = dynamodbClient.execute_statement(Statement=statement) # query for names with matching bigrams",
"",
" namesWithMatchingBiGrams = set()",
" for results in response['Items']:",
" namesWithMatchingBiGrams.update(results['names']['SS'])",
"",
" logger.info('Count of Names with Matching BiGrams:{}'.format(len(namesWithMatchingBiGrams)))",
" names = ','.join('\\'{}\\''.format(name) for name in namesWithMatchingBiGrams)",
" logger.info('Matching names: {}'.format(names))",
"",
" return namesWithMatchingBiGrams",
"",
"",
"def does_name_match_with_letter_shift(targetName, biGramIndexTableName, numLetterThreshold):",
" targetGrams = toBigrams(targetName)",
" candidateNames = query_possible_matches(targetGrams, biGramIndexTableName)",
" matches = []",
" result = {'match': False, 'names': ''}",
" for name in candidateNames:",
" if levenshtein_distance(targetName.lower(), name.lower()) <= numLetterThreshold:",
" result['match'] = True",
" logger.info('Matched: {0}'.format(name))",
" matches.append(name)",
"",
" result['names'] = matches",
" return result",
"",
"",
"def was_last_turn_spell_by_letter(sessionState):",
" if 'sessionAttributes' in sessionState and 'SpellByLetter' in sessionState['sessionAttributes']:",
" return bool(distutils.util.strtobool(sessionState['sessionAttributes']['SpellByLetter'])) == True",
"",
" return False",
"",
"",
"def does_first_name_spelled_exist_directory(firstName):",
" return does_name_match_with_letter_shift(firstName, 'FirstNameToBiGramIndex', LEVENSHTEIN_THRESHOLD)",
"",
"",
"def does_last_name_spelled_exist_directory(lastName):",
" return does_name_match_with_letter_shift(lastName, 'LastNameToBiGramIndex', LEVENSHTEIN_THRESHOLD)",
"",
"",
"def query_all_people_matching_last_names(lastNames):",
" dynamodbClient = boto3.client('dynamodb')",
" lastNameString = ','.join('\\'{}\\''.format(value) for value in lastNames)",
" statement = f'SELECT FirstName, FirstNameSoundex, LastName FROM NamesTable WHERE LastName IN [{lastNameString}]'",
" nextToken = None",
" peopleMatches = []",
" MAX_PAGINATION = 5",
" pageCount = 1",
"",
" while True:",
" # loop through all pages returned from ddb",
" pageCount += 1",
" if nextToken:",
" names = dynamodbClient.execute_statement(Statement=statement, NextToken=nextToken)",
" else:",
" names = dynamodbClient.execute_statement(Statement=statement)",
"",
" if 'Items' in names:",
" peopleMatches.extend(names['Items'])",
"",
" if 'NextToken' in names:",
" nextToken = names['NextToken']",
" else:",
" break",
"",
" if pageCount >= MAX_PAGINATION:",
" # ensure a reasonable limit to number of pages",
" break",
"",
" return peopleMatches",
"",
"",
"def exact_match_on_both_names(targetFirstName, targetLastName, people):",
" logger.info(f'{people}')",
" matches = []",
" for person in people:",
" if person['FirstName']['S'] == targetFirstName and person['LastName']['S'] == targetLastName:",
" logger.info(f'Match: {person}')",
" matches.append(person)",
" return matches",
"",
"",
"def exact_match_on_first_name_only(targetFirstName, people):",
" return [person for person in people if person['FirstName']['S'] == targetFirstName]",
"",
"",
"def soundex_match_on_first_name_only(targetFirstName, people):",
" soundex = Soundex()",
" targetFirstNameSoundex = soundex.phonetics(targetFirstName)",
" matches = [person for person in people if person['FirstNameSoundex']['S'] == targetFirstNameSoundex]",
" # return all matches",
" return matches",
"",
"",
"def disambiguate_last_name_matches_by_first_name(firstName, lastName, matches):",
" people = query_all_people_matching_last_names(matches)",
" logger.info(f'Disambiguate FirstName: {firstName}, LastName {lastName}')",
" matches = exact_match_on_both_names(firstName, lastName, people)",
" matches = []",
" if len(matches) > 0: # found exact match on first and last name",
" logger.info('Found exact match based on lastname and firstname')",
" logger.info(person)",
" people = person",
" else:",
" # no exact match on first name + last name, try first name",
" matches = exact_match_on_first_name_only(firstName, people)",
" if len(matches) > 0:",
" logger.info('Found first name match')",
" people = matches",
" else:",
" matches = soundex_match_on_first_name_only(firstName, people)",
" if len(matches) > 0:",
" logger.info('Found last name and first name soundex match')",
" people = matches",
" else:",
" # no matches, clear results",
" logger.info('No match on last name and first name')",
" people.clear()",
"",
" return people",
"",
"",
"def get_first_name_exist_in_directory(name):",
" namesTable = dynamodb.Table('NamesTable')",
" response = namesTable.scan(FilterExpression=Attr('FirstName').eq(name)) # check exact match",
" result = {'match': False, 'matches': []}",
" if 'Count' in response and response['Count'] > 0:",
" logger.info('Exact match found.')",
" result['match'] = True",
" for item in response['Items']:",
" result['matches'].append(item['FirstName'])",
" else: # no exact match, check soundex",
" logger.info('No exact match found, trying Soundex.')",
" soundex = Soundex()",
" nameSoundex = soundex.phonetics(name)",
" response = namesTable.scan(FilterExpression=Attr('FirstNameSoundex').eq(nameSoundex))",
" if 'Count' in response and response['Count'] > 0:",
" logger.info('Soundex match found.')",
" result['match'] = True",
" for item in response['Items']:",
" result['matches'].append(item['FirstName'])",
" result['matches']",
" if len(result['matches']) > 1:",
" result['matches'].sort(key=lambda n: abs(len(n) - len(name))) # sort list by len closest to the target name",
"",
" return result",
"",
"",
"def get_person_exist_in_directory(firstName, lastName):",
" namesTable = dynamodb.Table('NamesTable')",
" response = namesTable.scan(",
" FilterExpression=Attr('LastName').eq(lastName) & Attr('FirstName').eq(firstName)) # check exact match",
" result = {'match': False, 'matches': []}",
" if 'Count' in response and response['Count'] > 0:",
" logger.info('Exact match found.')",
" result['match'] = True",
" for item in response['Items']:",
" result['matches'].append(item['LastName'])",
" else: # no exact match, check soundex",
" logger.info('No exact match found, trying Soundex.')",
" soundex = Soundex()",
" nameSoundex = soundex.phonetics(lastName)",
" response = namesTable.scan(",
" FilterExpression=Attr('LastNameSoundex').eq(nameSoundex) & Attr('FirstName').eq(firstName))",
" if 'Count' in response and response['Count'] > 0:",
" logger.info('Soundex match found.')",
" result['match'] = True",
" for item in response['Items']:",
" result['matches'].append(item['LastName'])",
" result['matches']",
" if len(result['matches']) > 1:",
" result['matches'].sort(",
" key=lambda n: abs(len(n) - len(lastName))) # sort list by len closest to the target name",
"",
" return result",
"",