merge files from the blockchain infra repo (#59)

code/aws/lambda-function/sqs-sns_example/.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/

code/aws/lambda-function/sqs-sns_example/Makefile

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+install:
+	@python setup.py install && pip install -r requirements.txt
+
+build:
+	@/bin/bash ./scripts/build_package.sh
+
+clean:
+	@rm -rf /tmp/*.mp4 .coverage .tox build dist lib/*.pyc *.egg-info *pyc __pycache__/ ffmpeg* .pytest_cache /tmp/*mp4 /tmp/*jpg
+
+doctoc:
+	@doctoc README.md
+
+event:
+	@PYTHONPATH=$(pwd) ./scripts/create_test_event.py
+
+invoke:
+	@PYTHONPATH=$(pwd) lambda invoke -v
+
+lint:
+	@pep8 --exclude=build,venv,dist . && echo pep8: no linting errors
+
+fixlint:
+	@autopep8 --in-place *py lib/*py lib/handlers/*py lib/routes/*py tests/*py scripts/*py
+
+test:
+	@PYTHONPATH=$(pwd) py.test -v --color=yes --ignore=venv/
+
+deploy:
+	@/bin/bash scripts/deploy_lambda.sh sandbox
+
+sbox:
+	@/bin/cp .env.sample_sandbox .env
+
+stag:
+	@/bin/cp .env.sample_staging .env
+
+prod:
+	@/bin/cp .env.sample_prod .env
+
+.PHONY: install clean doctoc lint invoke test build deploy event fixlint prod stag sbox

code/aws/lambda-function/sqs-sns_example/README.md

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+# AWS Lambda Function to Trim Videos with FFMPEG 
+
+
+An AWS Lambda Function to trim videos served from an API endpoint, within two given NTP UTC timestamps. 
+
+The stack also uses SQS, SNS, and S3 resources.
+
+----
+
+# Table of Contents
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+- [Introduction](#introduction)
+- [Running Locally](#running-locally)
+    - [Create a virtual environment](#create-a-virtual-environment)
+    - [Configure the environment](#configure-the-environment)
+      - [Changes when moving to another environment](#changes-when-moving-to-another-environment)
+    - [Install the dependencies](#install-the-dependencies)
+    - [Create Sample SQS events](#create-sample-sqs-events)
+    - [Running the App locally](#running-the-app-locally)
+- [AWS Deploynment](#aws-deploynment)
+    - [Running the App as a Lambda Function](#running-the-app-as-a-lambda-function)
+    - [Testing the flow in AWS](#testing-the-flow-in-aws)
+    - [Debugging Errors](#debugging-errors)
+- [Contributing](#contributing)
+    - [Committing new code](#committing-new-code)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+----
+
+# Introduction
+
+
+As we see in this diagram, this application performs the following steps:
+
+1. Receive a SQS event requesting a clip for a given time interval. An example of SQS event is the follow:
+
+```json
+        {
+          "Records": [
+            {
+              "body": "{'clipId': '1111111111111', 'retryTimestamps': [], 'cameraId': '1111111111111', 'startTimestampInMs': 1537119363000, 'endTimestampInMs': 1537119423000}",
+              "receiptHandle": "MessageReceiptHandle",
+              "md5OfBody": "7b270e59b47ff90a553787216d55d91d",
+              "eventSourceARN": "arn:aws:sqs:us-west-1:123456789012:MyQueue",
+              "eventSource": "aws:sqs",
+              "awsRegion": "us-west-1",
+              "messageId": "19dd0b57-b21e-4ac1-bd88-01bbb068cb78",
+              "attributes": {
+                "ApproximateFirstReceiveTimestamp": "1523232000001",
+                "SenderId": "123456789012",
+                "ApproximateReceiveCount": "1",
+                "SentTimestamp": "1523232000000"
+              },
+              "messageAttributes": {
+                "SentTimestamp": "1523232000000"
+              }
+            }
+          ]
+        }
+ ```
+
+
+2. Call the camera API with the endpoint `/cameras/cameraID` to retrieve a camera alias for the given camera id.
+
+3. Call the camera API with the endpoint `/cameras/recording/` to retrieve a list of cam rewind source files within the given time range. 
+
+Which would generate this response:
+
+```json
+        [{
+            "startDate":"2018-09-16T16:00:17.000Z",
+            "endDate":"2018-09-16T16:10:17.000Z",
+            "thumbLargeUrl":URL,
+            "recordingUrl":URL,
+            "thumbSmallUrl":URL,
+            "alias":"test"
+         }]
+```
+
+4. Retrieve the cam rewind source files from the origin S3 bucket (downloading them on disk).
+
+5. Use ffmpeg to trim and merge clips into a single clip and to create several thumbnails.
+
+6. If the clips are available, store them in the destination S3 bucket.
+
+7. If the clips are not available, send a SQS message back to the queue, similar to the initial SQS, with a visibility timeout.
+
+8. Call the camera API with endpoint `/cameras/clips` to update the information about the new clip and send a SNS message with the resulting metadata. An example of SNS message:
+
+```json
+       { 
+          "clipId": "1111111111111",
+          "cameraId": "1111111111111",
+          "startTimestampInMs": 1534305591000,
+          "endTimestampInMs": 1534305611000,
+          "status": "CLIP_AVAILABLE",
+          "bucket": "s3-test",
+          "clip": {
+            "url": URL,
+            "key": "/test.mp4"
+          },
+          "thumbnail": {
+            "url": "https://url_{size}.png",
+            "key": "/1111111111111/1111111111111{size}.png",
+            "sizes": [300, 640, 1500, 3000]
+          }
+        }
+```
+
+
+
+# Running Locally
+
+To add new features to this application, follow these steps:
+
+### Create a virtual environment
+
+```bash
+virtualenv venv
+source venv/bin/activate
+```
+
+### Configure the environment
+
+```bash
+cp .env.sample_{env} .env
+vim .env
+```
+
+Where these are the global variables in this file:
+
+| Constant               | Definition                                                                             |
+| :----------------------|:-------------------------------------------------------------------------------------- |
+| CLIP_DOWNLOAD_DEST     | Where the clips are going to be downloaded in disk                                     |
+| TIMESTAMP_FORMAT       | The timestamp we will be parsing from the clip name strings                            |
+| OLD_FILE_FORMAT        | False if the clips to be downloaded have seconds encoded in their names (new format)   |
+| SQS_RETRY_LIMIT        | The limit, in seconds, of retries for CLIP PENDING (default: 15 minutes)               |
+| OUT_OF_RANGE_LIMIT     | The limit, in seconds, of how back in the past clips can be retrieved (default: 3 days)|
+| CAM_SERVICES_URL       | The url where the camera services is available                                         |
+| CLIP_URL               | The url where the clips are posted to, accordingly to the environment                  |
+| RECORDINGS_URL         | The url where the source recordings are retrieved.                                     |
+| THUMBNAIL_SIZES        | List of values for which clip thumbnails need to be created                            |
+| VIDEO_MAX_LEN          | Maximum length allowed for a clip                                                      |
+| S3_BUCKET_ORIGIN       | AWS S3 bucket where the rewinds are available                                          |
+| S3_BUCKET_ORIGIN_DIR   | AWS S3 'folder' where the rewinds are available                                        |
+| S3_BUCKET_DESTINATION  | AWS S3 bucket where the clips will be upload to.                                       |
+| AWS_SNS_TOPIC          | AWS SNS topic arn                                                                      |
+| AWS_SQS_QUEUE          | AWS SQS queue arn                                                                      |
+| AWS_SQS_QUEUE_URL      | AWS SQS queue url                                                                      |
+| SQS_TIMEOUT            | AWS SQS invisibility timeout in seconds                                                |
+
+
+
+#### Changes when moving to another environment
+
+Whenever you move among the environments (prod, sandbox, or staging), you need to change the following variables:
+
+
+| Constant                | Possible value                                      |
+| :---------------------- |:-------------------------------------------------   |
+| CLIP_URL                |   https://camclips.{ENV}.test.com                   |
+| S3_BUCKET_DESTINATION   |   cameras-service-clips-cdn-{ENV}                   |
+| AWS_SNS_TOPIC           |   arn:aws:sns:test_{ENV}                            |
+| AWS_SQS_QUEUE           |   arn:aws:sqs:test-sqs-{ENV}                        |
+| AWS_SQS_QUEUE_URL       |   https://sqs.test-sqs-{ENV}                        |
+
+
+### Install the dependencies
+
+```bash
+make install
+```
+
+### Create Sample SQS events
+
+To create an `event.json` file to be tested in this application, run:
+
+```bash
+make event
+```
+
+Note that this command runs `./scripts/create_test_event.py` considering that the camera `test` is up. In case it is down, you should add a valid camera to the global variables section in that script.
+
+You can create testing `event.json` to test alternate flows such as:
+
+* **Clip pending** (i.e. when the requested clip is within 15 minutes to the SQS message timestamp but it was not created yet):
+
+```bash
+python scripts/create_test_event.py -p
+```
+
+* **Clip not available** (i.e. when the requested clip is later than 15 minutes but within 3 days to the SQS message timestamp):
+
+```bash
+python scripts/create_test_event.py -n
+```
+
+* **Clip out of range** (i.e. when the requested clip is later than 3 days to the SQS message timestamp):
+
+```bash
+
+python scripts/create_test_event.py -o
+```
+
+
+### Running the App locally
+
+```bash
+make invoke
+```
+
+
+
+-----
+
+# AWS Deploynment
+
+### Running the App as a Lambda Function
+
+This creates a `.zip` package and deploys it to the lambda function:
+
+```bash
+make deploy
+```
+
+Check whether the package has the expected content:
+
+```bash
+unzip -l dist/cameras-service-generate-clip.zip
+```
+
+Note that this adds FFMPEG's dependencies manually and the Python dependencies are built within a Dockerfile.
+
+### Testing the flow in AWS
+
+You can test this application flow in sandbox and/or staging environment following theses steps:
+
+1. In the [SQS dashboard](https://console.aws.amazon.com/sqs/home?region=us-west-1), select SQS queue and click `Queue action -> Send a Message`.
+2. Type the value for `body`, similarly as the a message created in `event.json`. For instance:
+
+```
+{'clipId': '111111111111','retryTimestamps': [],'cameraId': '111111111111','startTimestampInMs': 1538412898000,'endTimestampInMs': 1538413498000}
+```
+
+1. This should trigger the lambda function and you should see the clips and thumbnails in the environment's S3 bucket in around 20-40 seconds.
+
+### Debugging Errors
+
+Errors will be logged in [CloudWatch](https://us-west-1.console.aws.amazon.com/cloudwatch/home?region=us-west-1#logs:). To make sense of logs in the CLI, you should install [saw](https://github.com/TylerBrock/saw).
+
+For instance, to check error logs for staging in the last hour:
+
+```bash
+saw get /aws/lambda/clip-function -1h --filter error
+```
+
+----
+
+# Contributing 
+
+### Committing new code
+
+Run unit tests with:
+
+```bash
+make test
+```
+
+When deploying scripts (or to report back to Github on PRs), we ensure that code follows style guidelines with:
+
+```bash
+make lint
+```
+
+To fix lint errors, use:
+
+```bash
+make fixlint
+```
+
+Update the documentation (README.md) with:
+
+```bash
+make doctoc
+```

code/aws/lambda-function/sqs-sns_example/config.yaml

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+region: us-west-1
+function_name: ffmpeg-trimmer
+handler: service.handler
+description: Lambda function for creating camera clips by two NTP UTC timestamps.

code/aws/lambda-function/sqs-sns_example/create_clip_id.py

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+#!/usr/bin/env python2
+#
+# Create a clipId to be used in event.json
+
+import requests
+import subprocess
+import json
+import time
+
+
+def put_request(url, data):
+    """
+        Send the PUT request to create the id, returning
+        the clipId string.
+    """
+
+    r = requests.post(url, json=data)
+    print('--------------------------------------------------------')
+    print('Request to {}'.format(url))
+    print('Data sent: {}'.format(data))
+    print('Status code: {}'.format(r.status_code))
+
+    if r.status_code == 200:
+        print(r.json())
+        return r.json()['clipId']
+
+    else:
+        return False
+
+
+def create_timestamps():
+    """
+        Create a timestamp to send in the PUT request.
+    """
+    now = int(time.time()*1000)
+    sent_ts = str(now)
+    begin_ts = str(now - 600000)
+    end_ts = str(now - 600000 + 180000)
+
+    return sent_ts, begin_ts, end_ts
+
+
+def create_data(cam_id, url, begin_ts, end_ts):
+    """
+        Create the data that need to be sent to the
+        PUT request.
+    """
+    data = {
+        "cameraId": cam_id,
+        "startTimestampInMs": begin_ts,
+        "endTimestampInMs": end_ts
+    }
+
+    return data
+
+
+def main(url, cam_id):
+
+    sent_ts, begin_ts, end_ts = create_timestamps()
+    data = create_data(cam_id, url, begin_ts, end_ts)
+    clip_id = put_request(url, data)
+
+    print('clipId to be added to event.json: {}'.format(clip_id))
+    print('send ts, start, end: {0}     {1}     {2}'.format(
+        sent_ts, begin_ts, end_ts))
+

code/aws/lambda-function/sqs-sns_example/error.sh

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+saw get /aws/lambda/ffmpeg-clip --start -24h --filter error

code/aws/lambda-function/sqs-sns_example/event.json

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+{
+  "Records": [
+    {
+      "attributes": {
+        "ApproximateFirstReceiveTimestamp": "XXXXXXXXXXXXXXXXXXX",
+        "ApproximateReceiveCount": "1",
+        "SenderId": "XXXXXXXXXXXXXXXXXXX",
+        "SentTimestamp": "1543318636000"
+      },
+      "awsRegion": "us-west-1",
+      "body": "{'clipId': '5bc67ace8e9c352780437d2c','retryTimestamps': [],'cameraId': '582356e81ee905c72145623e','startTimestampInMs': '1543318156000','endTimestampInMs': '1543318636000'}",
+      "eventSource": "aws:sqs",
+      "eventSourceARN": "XXXXXXXXXXXXXXXXXXX",
+      "md5OfBody": "XXXXXXXXXXXXXXXXXXX",
+      "messageAttributes": {},
+      "messageId": "XXXXXXXXXXXXXXXXXXX",
+      "receiptHandle": "XXXXXXXXXXXXXXXXXXX"
+    }
+  ]
+}

code/aws/lambda-function/sqs-sns_example/requirements.txt

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+boto3==1.4.4
+botocore==1.5.62
+certifi==2023.7.22
+chardet==3.0.4
+click==6.6
+docutils==0.12
+futures==3.2.0
+idna==2.7
+jmespath==0.9.0
+pyaml==15.8.2
+python-dateutil==2.5.3
+python-dotenv==0.9.1
+python-lambda==3.2.2
+PyYAML==5.4
+requests==2.31.0
+s3transfer==0.1.13
+six==1.10.0
+urllib3==1.26.5
+autopep8==1.4
+appdirs==1.4.3
+packaging==16.8
+pep8==1.7.0
+py==1.11.0
+pyaml==15.8.2
+pyparsing==2.2.0
+pytest==3.0.7
+virtualenv==15.0.3
+jmespath==0.9.0
+mock==2.0.0
+requests-mock==1.5.2
+coverage==4.5.1

code/aws/lambda-function/sqs-sns_example/scripts/.dockerignore

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+packages
+lib
+app
+Dockerfile.build

code/aws/lambda-function/sqs-sns_example/scripts/Dockerfile.build

@@ -0,0 +1,9 @@
+FROM amazonlinux:1
+
+WORKDIR /opt/app
+
+ADD requirements.txt .
+
+RUN \
+  yum install -y python27-pip && \
+  pip install --target=/opt/app -r requirements.txt

code/aws/lambda-function/sqs-sns_example/scripts/build_package.sh

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+#!/usr/bin/env bash
+# This script adds additional dependences that are need for the lambda function package.
+
+set -x
+
+PACKAGE_NAME=cameras-clip.zip
+
+# If S3_BUCKET env var isn't set, default it
+if [ -z "${S3_BUCKET}" ]; then
+  S3_BUCKET=s3-test
+fi
+
+# Set dist env and create initial zip file
+ORIGIN=$pwd
+rm -rf dist && mkdir dist
+lambda build --local-package . && mv dist/*.zip dist/$PACKAGE_NAME
+cd dist/
+
+## Fetch & add binary for FFMPEG
+aws s3 cp "s3://${S3_BUCKET}/ffmpeg/ffmpeg-release-64bit-static.tar.xz" . && tar xf ffmpeg-release-64bit-static.tar.xz
+zip -j -r9 $PACKAGE_NAME ffmpeg-*-64bit-static/ffmpeg
+zip -j -r9 $PACKAGE_NAME ffmpeg-*-64bit-static/ffprobe
+
+# Add this App's source code
+cp -r ../lib .
+zip -r9 $PACKAGE_NAME lib
+
+# Add dependencies from pip
+mkdir packages
+cp ../scripts/Dockerfile.build Dockerfile
+cp ../scripts/.dockerignore .dockerignore
+cp ../requirements.txt .
+docker build --tag pillow-build .
+CTNHASH="$(docker create pillow-build)"
+docker cp "${CTNHASH}":/opt/app/ .
+cp -rf app/* packages/
+
+# Package everything
+cd packages
+zip -ur9 ../$PACKAGE_NAME *
+cd ..
+
+# Clean up
+#rm -rf ffmpeg-release-64bit-static.tar.xz ffmpeg-*-64bit-static/ packages/ lib/
+docker rm ${CTNHASH}
+cd $ORIGIN

code/aws/lambda-function/sqs-sns_example/scripts/create_test_event.py

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+#!/usr/bin/env python2
+#
+# For integration tests, different SQS events are needed.
+# This script generates events for alternate flows.
+# Global variables are defined in main().
+
+import time
+import json
+import argparse
+import datetime
+import calendar
+import datetime
+
+
+def time_to_epoch(timestamp, timestamp_format):
+    """
+        Given a timestamp string in seconds, return
+        the epoch timestamp string, in milliseconds.
+    """
+    date = time.strptime(str(timestamp), timestamp_format)
+    return str(calendar.timegm(date)) + '000'
+
+
+def generate_delta_time(delta, timestamp_format, now, days):
+    """
+        Given a clip duration delta, and how many days back
+        from today, return a begin and end timestamp for the event.
+    """
+    end = now - datetime.timedelta(days=days, minutes=0)
+    begin = now - datetime.timedelta(days=days, minutes=delta)
+    return begin.strftime(timestamp_format), end.strftime(timestamp_format)
+
+
+def get_current_local_time(timestamp):
+    """
+        Return the current time in a datetime object, a
+        human-readable string, and an epoch time integer.
+    """
+    now = datetime.datetime.now()
+    human_now = now.strftime(timestamp)
+    epoch_now = time_to_epoch(human_now, timestamp)
+    return now, human_now, epoch_now
+
+
+def create_event(begin, end, event_file, cam_id, epoch_now):
+    """
+        Create an event.json SQS message file for
+        tests with the new timestamps and save it to the
+        destination in event_file.
+    """
+    data = {'Records': [
+        {
+            "md5OfBody": "XXXXXXXXXXXXXXXXXXX",
+            "receiptHandle": "XXXXXXXXXXXXXXXXXXX",
+            "body": ("{'clipId': '1111111111111111',"
+                     "'retryTimestamps': [],"
+                     "'cameraId': '" + str(cam_id) + "',"
+                     "'startTimestampInMs': '" + str(begin) + "',"
+                     "'endTimestampInMs': '" + str(end) + "'}"),
+            "eventSourceARN": "XXXXXXXXXXXXXXXXXXX",
+            "eventSource": "aws:sqs",
+            "awsRegion": "us-west-1",
+            "messageId": "XXXXXXXXXXXXXXXXXXX",
+            "attributes": {
+                "ApproximateFirstReceiveTimestamp": "XXXXXXXXXXXXXXXXXXX",
+                "SenderId": "XXXXXXXXXXXXXXXXXXX",
+                "ApproximateReceiveCount": "1",
+                "SentTimestamp": epoch_now
+            },
+            "messageAttributes": {}
+        }
+    ]
+    }
+
+    with open(event_file, 'w') as f:
+        json.dump(data, f, separators=(',', ': '), sort_keys=True, indent=2)
+
+    return data['Records'][0]['body']
+
+
+def main():
+
+    # Global variables.
+    EVENT_FILE = 'event.json'
+    TIMESTAMP_FORMAT = '%d-%m-%Y %H:%M:%S'
+    DAYS_BEFORE_PENDING = 0
+    DAYS_BEFORE_AVAILABLE = 0
+    DAYS_BEFORE_NOT_AVAILABLE = 2
+    DAYS_BEFORE_OUT_OF_RANGE = 8
+
+    # Camera IDs used for tests, they should be checked whether
+    # they are currently down or not. For instance:
+    CAM_DOWN = '1111111111111111'
+    CAM_UP = '1111111111111111'
+
+    # This should not be more than 5 minutes (or the rewind clip generator
+    # app won't accent the event).
+    SESSION_DURATION_OK = 3
+    SESSION_DURATION_CLIP_TO_LONG = 8
+
+    # Get the time of event to be generated.
+    parser = argparse.ArgumentParser(
+        description='Clip duration you are looking for (in mins):')
+    parser.add_argument('-a', '--clip_available',
+                        action='store_true', help='Event for <15 min')
+    parser.add_argument('-p', '--clip_pending',
+                        action='store_true', help='Event cam down <15 min')
+    parser.add_argument('-o', '--clip_out_of_range',
+                        action='store_true', help='Event for >3 days')
+    parser.add_argument('-n', '--clip_not_available',
+                        action='store_true', help='Event cam down >3 days')
+    parser.add_argument('-t', '--clip_too_long',
+                        action='store_true', help='Clips > 5 min')
+    args = parser.parse_args()
+
+    # Define what type of event we want.
+    if args.clip_pending:
+        days_before = DAYS_BEFORE_PENDING
+        cam_id = CAM_DOWN
+        session_duration = SESSION_DURATION_OK
+
+    elif args.clip_out_of_range:
+        days_before = DAYS_BEFORE_OUT_OF_RANGE
+        cam_id = CAM_UP
+        session_duration = SESSION_DURATION_OK
+
+    elif args.clip_not_available:
+        days_before = DAYS_BEFORE_NOT_AVAILABLE
+        cam_id = CAM_DOWN
+        session_duration = SESSION_DURATION_OK
+
+    elif args.clip_too_long:
+        days_before = DAYS_BEFORE_AVAILABLE
+        cam_id = CAM_UP
+        session_duration = SESSION_DURATION_CLIP_TO_LONG
+
+    else:
+        # Defaults to CLIP_AVAILABLE event.
+        days_before = DAYS_BEFORE_AVAILABLE
+        cam_id = CAM_UP
+        session_duration = SESSION_DURATION_OK
+
+    # Get current time in human string and epoch int.
+    now, human_now, epoch_now = get_current_local_time(TIMESTAMP_FORMAT)
+
+    # Generates a random begin and end time within the last days.
+    begin, end = generate_delta_time(
+        session_duration, TIMESTAMP_FORMAT, now, days_before)
+
+    # Convert these times to epoch timestamp and human time.
+    end_epoch = time_to_epoch(end, TIMESTAMP_FORMAT)
+    begin_epoch = time_to_epoch(begin, TIMESTAMP_FORMAT)
+
+    if begin_epoch and end_epoch:
+
+        # Creates the JSON file for the event.
+        body = create_event(begin_epoch, end_epoch,
+                            EVENT_FILE, cam_id, epoch_now)
+
+        print('-----------------------------------------------------')
+        print('Event test saved at {}'.format(EVENT_FILE))
+        print('Camera id is {}'.format(cam_id))
+        print('Timestamp for {0} days ago, delta time is {1} mins').format(
+            days_before, session_duration)
+        print('Begin: {0} -> End: {1}'.format(begin_epoch, end_epoch))
+        print('Begin: {0} -> End: {1}'.format(begin, end))
+        print('Time:  {}'.format(human_now))
+        print('Body: ')
+        print(body)
+        print('-----------------------------------------------------')
+
+    else:
+        print('Could not create timestamps for {}'.format(duration))
+
+
+if __name__ == '__main__':
+    main()

code/aws/lambda-function/sqs-sns_example/scripts/deploy_lambda.sh

@@ -0,0 +1,58 @@
+#!/bin/bash -ex
+# Script that deploy this app to the AWS lambda function, similarly to Jenkins.
+
+USAGE=$(cat <<-END
+Usage:
+  deploy_lambda.sh <environment>
+Examples:
+  deploy_lambda.sh staging
+END
+)
+
+if [[ "$1" = "-h" ]]; then
+  echo "${USAGE}"
+  exit
+fi
+
+if [[ -n "$1" ]]; then
+  SERVER_GROUP=$1
+else
+  echo '[ERROR] You must specify  the env: production, sandbox, staging'
+  echo
+  echo "${USAGE}"
+  exit 1
+fi
+
+BUILD_ENVIRONMENT=$1
+APP_NAME=cameras-service-generate-clip
+export AWS_DEFAULT_REGION="us-west-1"
+export AWS_REGION="us-west-1"
+
+if [[ "${BUILD_ENVIRONMENT}" == "sandbox" ]]; then
+  S3_BUCKET=sl-artifacts-dev
+else
+  S3_BUCKET="sl-artifacts-${BUILD_ENVIRONMENT}"
+fi
+
+S3_PREFIX="lambda-functions/${APP_NAME}"
+S3_BUNDLE_KEY="sl-${APP_NAME}.zip"
+S3_TAGGED_BUNDLE_KEY="sl-${APP_NAME}-${BUILD_TAG}.zip"
+
+make clean
+make install
+make lint
+make build
+
+aws \
+    s3 cp "dist/${S3_BUNDLE_KEY}" "s3://${S3_BUCKET}/${S3_PREFIX}/${S3_BUNDLE_KEY}"
+
+aws \
+    s3 cp "s3://${S3_BUCKET}/${S3_PREFIX}/${S3_BUNDLE_KEY}" "s3://${S3_BUCKET}/${S3_PREFIX}/${S3_TAGGED_BUNDLE_KEY}"
+
+aws \
+    lambda update-function-code \
+    --function-name "sl-${APP_NAME}-${BUILD_ENVIRONMENT}" \
+    --s3-bucket "${S3_BUCKET}" \
+    --s3-key "${S3_PREFIX}/${S3_TAGGED_BUNDLE_KEY}"
+
+echo "build description:${APP_NAME}|${BUILD_ENVIRONMENT}|${BUILD_TAG}|"

code/aws/lambda-function/sqs-sns_example/scripts/get_recording_list.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+curl -i URL?startDate=$(date -v '-1H' +%s)000&endDate=$(date +%s)000

code/aws/lambda-function/sqs-sns_example/service.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+"""
+Service handler module for AWS Lambda function. 'HANDLERS' constant dict is
+used to map route requests to correct handler.
+"""
+
+import logging
+from lib.config import LOG_LEVEL
+from lib.routes import root
+
+if LOG_LEVEL in ('CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG', 'NOTSET'):
+    level = logging.getLevelName(LOG_LEVEL)
+else:
+    level = logging.INFO
+
+logging.basicConfig(level=level)
+handler = root.handler

code/aws/lambda-function/sqs-sns_example/setup.py

@@ -0,0 +1,7 @@
+from distutils.core import setup
+
+setup(
+    name='rewind_clip_generator',
+    version='1.0',
+    packages=['lib', 'lib.routes', 'lib.handlers'],
+)

code/aws/lambda-function/sqs-sns_example/tests/__init__.py

@@ -0,0 +1 @@
+# -*- coding: utf-8 -*-

code/aws/lambda-function/sqs-sns_example/tests/fixtures/SNS_contract.json

@@ -0,0 +1,19 @@
+
+{
+  "clipId": "11111111111",
+  "cameraId": "11111111111",
+  "startTimestampInMs": 1534305591000,
+  "endTimestampInMs": 1534305611000,
+  "status": "CLIP_AVAILABLE",
+  "bucket": "sl-cam-clip-archive-prod",
+  "clip": {
+    "url": "https://test.mp4",
+    "key": "/583499c4e411dc743a5d5296/11111111111.mp4"
+  },
+  "thumbnail": {
+    "url": "https://test_{size}.png",
+    "key": "/11111111111/1111111111_{size}.png",
+    "sizes": [300, 640, 1500, 3000]
+  }
+}
+

code/aws/lambda-function/sqs-sns_example/tests/fixtures/SQS_contract.json

@@ -0,0 +1,24 @@
+{
+  "Records": [
+    {
+      "body": "{'clipId': '507f191e810c19729de860ea', 'retryTimestamps': [], 'cameraId': '583499c4e411dc743a5d5296', 'startTimestampInMs': 1537119363000, 'endTimestampInMs': 1537119423000}",
+      "receiptHandle": "MessageReceiptHandle",
+      "md5OfBody": "7b270e59b47ff90a553787216d55d91d",
+      "eventSourceARN": "arn:aws:sqs:us-west-1:123456789012:MyQueue",
+      "eventSource": "aws:sqs",
+      "awsRegion": "us-west-1",
+      "messageId": "19dd0b57-b21e-4ac1-bd88-01bbb068cb78",
+      "attributes": {
+        "ApproximateFirstReceiveTimestamp": "1523232000001",
+        "SenderId": "123456789012",
+        "ApproximateReceiveCount": "1",
+        "SentTimestamp": "1523232000000"
+      },
+      "messageAttributes": {
+        "SentTimestamp": "1523232000000"
+      }
+    }
+  ]
+}
+
+

code/aws/lambda-function/sqs-sns_example/tests/fixtures/recording_contract.json

@@ -0,0 +1,10 @@
+[
+  {
+    "startDate":"2018-08-25T19:20:16.000Z",
+    "endDate":"2018-08-25T19:30:16.000Z",
+    "thumbLargeUrl":"https://test_full.jpg",
+    "recordingUrl":"https://test.mp4",
+    "thumbSmallUrl":"https://test_small.jpg",
+    "alias":"test"
+ }
+]

code/aws/lambda-function/sqs-sns_example/tests/routes/test_root.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+""" Test Root service handler module for AWS Lambda function. """
+
+import os
+import json
+import pytest
+
+from lib.routes import root
+
+fixtures_path = os.path.join(os.path.dirname(__file__), '..', 'fixtures')
+
+
+@pytest.fixture
+def sns_event_record():
+    sns_event_record_path = os.path.join(fixtures_path, 'SNS_contract.json')
+    with open(sns_event_record_path, 'r') as sns_event_record_json:
+        return json.load(sns_event_record_json)
+
+
+@pytest.fixture
+def context():
+    return {}
+
+
+class TestHandler():
+    def test_type_error_for_bad_params(self, context):
+        try:
+            root.handler('', context)
+        except TypeError as e:
+            pass
+        else:
+            self.fail('ExpectedException not raised')

code/aws/lambda-function/sqs-sns_example/tests/test_aws_wrapper.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+""" AWS Wrapper Test Module """
+
+import unittest
+import mock
+
+import lib.aws_wrapper
+
+
+class TestAwsWrapper(unittest.TestCase):
+
+    def setUp(self):
+        self.filename = 'filename_test'
+        self.destination = 'destination_test'
+        self.clip_metadata = {'test': 'test'}
+        self.aw = lib.aws_wrapper.AwsWrapper()
+
+    @mock.patch('lib.aws_wrapper.boto3')
+    def test_download_clip_boto(self, boto3):
+        self.aw.download_video(self.filename, self.destination)
+        boto3.resource.assert_called_with('s3')
+
+    @mock.patch('lib.aws_wrapper.boto3')
+    def test_upload_clip_boto(self, boto3):
+        self.aw.upload_asset(self.filename, self.destination)
+        boto3.client.assert_called_with('s3')
+
+    @mock.patch('lib.aws_wrapper.boto3')
+    def test_send_sns_msg_boto(self, boto3):
+        aw = lib.aws_wrapper.AwsWrapper()
+        aw.send_sns_msg(self.clip_metadata)
+        boto3.client.assert_called_with('sns')

code/aws/lambda-function/sqs-sns_example/tests/test_cam_wrapper.py

@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+""" Cam Wrapper Test Module """
+
+import mock
+import unittest
+import pytest
+
+import lib.cam_wrapper
+import lib.utils
+
+
+class TestCamWrapper(unittest.TestCase):
+
+    def setUp(self):
+        self.session_start_ms = '1535223360000'
+        self.session_end_ms = '1535224400000'
+        self.cameraId = '1111111111111111'
+        self.clipId = '1111111111111111'
+
+        self.metadata_test_clip_key = '/{0}/{1}.mp4'.format(
+            self.cameraId, self.clipId)
+        self.metadata_test_tb_key = '/{0}/{1}'.format(
+            self.cameraId, self.clipId) + '_{size}.jpg'
+        self.cw = lib.cam_wrapper.CamWrapper(
+            self.session_start_ms, self.session_end_ms,
+            self.cameraId, self.clipId)
+
+    @mock.patch('lib.utils.get_request')
+    def test_get_alias(self, mocked_method):
+        self.cw .get_alias()
+        self.assertTrue(mocked_method.called)
+
+    def test_metadata(self):
+        self.assertEqual(
+            self.cw .metadata['clip']['key'], self.metadata_test_clip_key)
+        self.assertEqual(
+            self.cw .metadata['thumbnail']['key'], self.metadata_test_tb_key)
+
+    @mock.patch('lib.utils.get_request')
+    def test_get_clip_names(self, mocked_method):
+        alias = self.cw .get_clip_names()
+        self.assertTrue(mocked_method.called)
+
+    @mock.patch('lib.utils.put_request')
+    def test_put_clip_metadata(self, mocked_method):
+        alias = self.cw .put_clip_metadata()
+        self.assertTrue(mocked_method.called)
+
+    def test_update_clip_status(self):
+        test_status = 'test'
+        self.cw.update_clip_status(test_status)
+        self.assertEqual(self.cw.metadata['status'], test_status)

code/aws/lambda-function/sqs-sns_example/tests/test_ffmpeg_wrapper.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+""" Ffmpeg Wrapper Test Module """
+
+import lib.ffmpeg_wrapper
+import unittest
+
+
+class TestFfmpegWrapper(unittest.TestCase):
+
+    def setUp(self):
+        self.epoch_video = 1.535884819e+12
+        self.crop_start = '03:39.000'
+        self.crop_end = '13:01.000'
+
+        self.session_start_ms = '1535884600000'
+        self.session_end_ms = '1535885600000'
+        self.alias = 'test'
+        self.clipId = '1111111111111111'
+        self.clips = []
+        self.fw = lib.ffmpeg_wrapper.FfmpegWrapper(
+            self.alias, self.clips,
+            self.session_start_ms,
+            self.session_end_ms,
+            self.clipId)
+
+    def test_calculate_crop_time(self):
+        crop_start, crop_end = self.fw.calculate_trim_time(self.epoch_video)
+        print crop_start, crop_end, self.crop_end, self.crop_start
+        self.assertEqual(crop_end, self.crop_end)
+        self.assertEqual(crop_start, self.crop_start)

code/aws/lambda-function/sqs-sns_example/tests/test_utils.py

@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+""" Utils Test Module """
+
+import os
+import json
+import pytest
+import unittest
+
+import mock
+import requests
+import requests_mock
+import lib.utils
+
+
+fixtures_path = os.path.join(os.path.dirname(__file__), 'fixtures')
+
+
+@pytest.fixture
+def get_fixture(fixture_json):
+    get_sqs_event = os.path.join(fixtures_path, fixture_json)
+    with open(get_sqs_event, 'r') as f:
+        return json.load(f)
+
+
+class TestClipGeneratorTrigger(unittest.TestCase):
+
+    def setUp(self):
+        self.domain = 'http://test.com'
+        self.endpoint = 'filetest.mp4'
+        self.file_url = 'http://test.com/filetest.mp4'
+        self.clipname = 'camtest.20180815T140019.mp4'
+        self.epoch_in_ms = 1535224400000
+        self.timestamp = '20180825T191320'
+        self.timestamp_format = '%Y%m%dT%H%M%S'
+        self.msecs = 1807
+        self.resp = {'test1': 'test2'}
+
+    def test_url_join(self):
+        self.assertEqual('http://test.com/filetest.mp4',
+                         lib.utils.url_join(self.domain,
+                                            self.endpoint), msg=None)
+
+    def test_get_request(self):
+        with requests_mock.Mocker() as m:
+            m.get(self.file_url, json=self.resp)
+            self.assertTrue(lib.utils.get_request(self.domain, self.endpoint))
+
+    def test_get_basename_str(self):
+        self.assertEqual('filetest.mp4', lib.utils.get_basename_str(
+            self.file_url), msg=None)
+
+    def test_get_timestamp_str(self):
+        self.assertEqual('20180815T140019000',
+                         lib.utils.get_timestamp_str(self.clipname), msg=None)
+
+    def test_get_location_str(self):
+        self.assertEqual('hbpiernscam', lib.utils.get_location_str(
+            self.clipname), msg=None)
+
+    def test_timestamp_to_epoch(self):
+        self.assertEqual(self.epoch_in_ms, lib.utils.timestamp_to_epoch(
+            self.timestamp, self.timestamp_format), msg=None)
+
+    def test_epoch_to_timestamp(self):
+        self.assertEqual(self.timestamp, lib.utils.epoch_to_timestamp(
+            self.epoch_in_ms, self.timestamp_format), msg=None)
+
+    def test_humanize_delta_time(self):
+        self.assertEqual(
+            '00:01.807', lib.utils.humanize_delta_time(self.msecs), msg=None)
+
+    @mock.patch('lib.utils.os.remove')
+    def test_remove_file(self, mocked_remove):
+        lib.utils.remove_file(self.clipname)
+        self.assertTrue(mocked_remove.called)
+
+    @mock.patch('lib.utils.subprocess.check_output')
+    def test_run_subprocess(self, mocked_subprocess):
+        lib.utils.run_subprocess(['ls'], 'ok', 'err')
+        self.assertTrue(mocked_subprocess.called)