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EP-DB.py
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EP-DB.py
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import json
import boto3
import random
from botocore.vendored import requests
es_domin = 'https://search-easy-planner-usr-wand4exyx77d6e7ohl4gxmvs2i.us-east-1.es.amazonaws.com/users/'
dynamodb = boto3.resource('dynamodb')
headers = {'Content-Type' : 'application/json'}
def createRandomString(len):
print ('wet'.center(10,'*'))
raw = ""
range1 = range(58, 65) # between 0~9 and A~Z
range2 = range(91, 97) # between A~Z and a~z
i = 0
while i < len:
seed = random.randint(48, 122)
if ((seed in range1) or (seed in range2)):
continue;
raw += chr(seed);
i += 1
# print(raw)
return raw
def dbsearch(query):
table = dynamodb.Table('Easy-Planner-user')
res = []
responses = table.get_item(Key={
'email': query
})
email_res = responses['Item']['friends']
for email in email_res:
url = es_domin + '_search?q=email:{}&size=1'.format(email)
response = requests.request('GET', url).json()
print(response)
if response['hits']['total']:
res.append((email, response['hits']['hits'][0]['_source']['name']))
else:
res.append((email, ""))
# print(response)
email_list = [{'name': name, 'email': email} for (email, name) in res]
# print(email_list)
return {
'statusCode': 200,
'body': email_list
}
def eventput(data):
env_table = dynamodb.Table('Easy-Planner-events')
data_ID = createRandomString(10)
# print(data['eventParticipants'])
responses = env_table.put_item(Item={
'eventID': data_ID,
'eventName': data['eventName'],
'eventDestination': data['eventDestination'],
'eventDestinationId': data['eventDestinationId'],
'eventStartDateTime': data['eventStartDateTime'],
'eventEndDateTime': data['eventEndDateTime'],
'eventHost': data['eventHost'],
'eventParticipants': data['eventParticipants']
})
url = es_domin + '_search?q=email:{}&size=1'.format(data['eventHost'])
response = requests.request('GET', url).json()
if response['hits']['total']:
host_name = response['hits']['hits'][0]['_source']['name']
else:
host_name = ""
sqs = boto3.resource('sqs')
queue = sqs.get_queue_by_name(QueueName='easy-planner')
msg = {
'Emails': {
'StringValue': ",".join(data['eventParticipants']),
'DataType': 'String'
},
'Messages': {
'StringValue': "Dear user, {} invites you to attend the event at {} from {} to {}. Please visit our website for more details.".format(host_name, data['eventDestination'], data['eventStartDateTime'], data['eventEndDateTime']),
'DataType': 'String'
}
}
queue.send_message(MessageBody='message', MessageAttributes=msg)
db_update([data['eventHost']], data_ID, 'events')
db_update(data['eventParticipants'], data_ID, 'pending')
# print(responses)
return {
'statusCode': 200
}
def db_update(emails, eventID, key):
usr_table = dynamodb.Table('Easy-Planner-user')
# print(usr_table.global_secondary_indexes)
for email in emails:
old_res = usr_table.get_item(
Key={
'email': email
}
)
try:
if eventID not in old_res['Item'][key]:
response = usr_table.update_item(
Key={
'email': email
},
AttributeUpdates={
key: {
'Value': old_res['Item'][key] + [eventID],
'Action': 'PUT'
}
}
)
except:
response = usr_table.update_item(
Key={
'email': email
},
AttributeUpdates={
key: {
'Value': [eventID],
'Action': 'PUT'
}
}
)
def userreg(data):
email, name = data['email'], data['name']
client = boto3.client('sns')
table = dynamodb.Table('Easy-Planner-user')
# print(email)
topic_arn = client.create_topic(Name=email.replace('@','-').replace('.','-'))
# print(topic_arn)
response = client.subscribe(
TopicArn=topic_arn['TopicArn'],
Protocol='email',
Endpoint=email
)
fields = {
'name': name,
'email': email,
'events': [],
'pending': []
}
response = requests.request('POST', es_domin + '_doc', headers=headers, data=json.dumps(fields))
response = table.put_item(Item={'email': email})
# print(response.json())
return {
'statusCode': 200
}
def eventget(data):
env_table = dynamodb.Table('Easy-Planner-events')
usr_table = dynamodb.Table('Easy-Planner-user')
res = []
usr_responses = usr_table.get_item(Key={
'email': data
})
# print(usr_responses)
event_res = usr_responses['Item']['events']
for event_ID in event_res:
"""
url = es_domin + '_search?q=email:{}&size=1'.format(data['eventHost'])
response = requests.request('GET', url).json()
host_name = response['hits']['hits'][0]['_source']['name']
for user in env_responses['Item']['eventParticipants']:
url = es_domin + '_search?q=email:{}&size=1'.format(data['eventHost'])
response = requests.request('GET', url).json()
"""
env_responses = env_table.get_item(Key={
'eventID': event_ID
})
res.append({
'eventID': event_ID,
'eventName': env_responses['Item']['eventName'],
'eventDestination': env_responses['Item']['eventDestination'],
'eventDestinationId': env_responses['Item']['eventDestinationId'],
'eventStartDateTime': env_responses['Item']['eventStartDateTime'],
'eventEndDateTime': env_responses['Item']['eventEndDateTime'],
'eventHost': env_responses['Item']['eventHost'],
'eventParticipants': env_responses['Item']['eventParticipants'],
'isPending': False
})
pending_res = usr_responses['Item']['pending']
for event_ID in pending_res:
print(env_table.key_schema)
env_responses = env_table.get_item(Key={
'eventID': event_ID
})
res.append({
'eventID': event_ID,
'eventName': env_responses['Item']['eventName'],
'eventDestination': env_responses['Item']['eventDestination'],
'eventDestinationId': env_responses['Item']['eventDestinationId'],
'eventStartDateTime': env_responses['Item']['eventStartDateTime'],
'eventEndDateTime': env_responses['Item']['eventEndDateTime'],
'eventHost': env_responses['Item']['eventHost'],
'eventParticipants': env_responses['Item']['eventParticipants'],
'isPending': True
})
return {
'statusCode': 200,
'body': res
}
def pendingappr(data):
usr_table = dynamodb.Table('Easy-Planner-user')
[email, eventID] = data.split(',')
res = usr_table.get_item(
Key={
'email': email
}
)
old_event = res['Item']['events']
old_pending = res['Item']['pending']
old_pending.remove(eventID)
response = usr_table.update_item(
Key={
'email': email
},
AttributeUpdates={
'pending': {
'Value': old_pending,
'Action': 'PUT'
},
'events': {
'Value': old_event + [eventID],
'Action': 'PUT'
}
}
)
return {
'statusCode': 200
}
def lambda_handler(event, context):
# return event
if event['context']['resource-path'] == "/search":
res = dbsearch(event['params']['querystring']['q'])
elif event['context']['resource-path'] == "/event":
if event['context']['http-method'] == 'PUT':
res = eventput(event['body-json'])
elif event['context']['http-method'] == 'GET':
res = eventget(event['params']['querystring']['q'])
elif event['context']['http-method'] == 'DELETE':
res = pendingappr(event['params']['querystring']['q'])
elif event['context']['resource-path'] == "/register":
res = userreg(event['body-json'])
# rst_info = ", ".join(["{}. {}, located at {}".format(i, item['Item']['Name'], item['Item']['Address']) for i, item in enumerate(responses, 1)])
return res