# ==================================================================================
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# ==================================================================================
#
# stvblogGetUploadUrl
# by: Matthew Juliana
# For questions or feedback, please contact mattjul@amazon.com
# 
# Purpose: The labmda will generate a pre-signed URL for uploading the source video file
# 
# Change Log:
#           3/1/21: Initial version
#
# ==================================================================================


import json
import boto3
from botocore.exceptions import ClientError
import ssmparms as sp

def lambda_handler(event, context):
    
    uploadBucketName = sp.get_parameter( "/stvblog/uploadFolder")['Parameter']['Value']
    fileName=event["queryStringParameters"]['filename']
    objectName=fileName
    fields = {"Content-Type": "video/mp4"}
    conditions = [
    {"Content-Type": "video/mp4"}
    ]
    expiration=300


    # # Generate a presigned S3 POST URL
    s3_client = boto3.client('s3')
    try:
        response = s3_client.generate_presigned_post(uploadBucketName, objectName, Fields=fields, Conditions=conditions, ExpiresIn=expiration)
    except ClientError as e:
        print(e)
        return None
    
    return response