Initial commit (#1)

.coveragerc

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+[report]
+sort = Cover
+[run]
+omit = src/slacknewsbot/venv/*

.flake8

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+[flake8]
+max-line-length = 88
+ignore = E501,E402,E127
+exclude =
+    venv
+    .terraform

.github/workflows/main.yml

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+name: CI
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.7, 3.8]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install flake8 pytest
+          if [ -f src/slacknewsbot/requirements.txt ]; then pip install -r src/slacknewsbot/requirements.txt; fi
+      
+      - name: Lint with flake8
+        run: |
+          flake8 --count --show-source --statistics
+      
+      - name: Test with pytest
+        run: |
+          PYTHONPATH=./src pytest --cov=src --cov-branch --cov-report term-missing

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+builds/
+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.*
+.cachepip install -r src/slacknewsbot/requirements.txt
+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/
+
+.vscode/
+
+*.git
+*.tfstate
+*.backup
+*.tfplan
+.terraform*
+*.zip
+*output.txt
+secrets*

.pre-commit-config.yaml

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+repos:
+  - repo: git://github.com/antonbabenko/pre-commit-terraform
+    rev: v1.45.0
+    hooks:
+      - id: terraform_fmt

Makefile

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+.PHONY: check test deploy deploy-with-secrets-file
+
+check: ## Run linters
+		@echo "*** running linters ***"
+		flake8 --count --show-source --statistics
+		@echo "*** all linters passing ***"
+test: check ## Run tests
+		@echo "*** running tests ***"
+		PYTHONPATH=./src pytest --cov=src --cov-branch --cov-report term-missing
+		@echo "*** all tests passing ***"
+deploy: test ## Deploy project when secrets are exported as env variables
+		@echo "*** running deploy ***"
+		terraform apply
+deploy-with-secrets-file: test ## Deploy project when secrets are stored in secrets.tfvars file
+		@echo "*** running deploy ***"
+		terraform apply -var-file=secrets.tfvars

README.md

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+
+
+## Create virtualenv
+```
+python3 -m venv venv
+source venv/bin/activate
+pip install -r src/slacknewsbot/requirements.txt
+```
+
+## Run tests
+```
+make tests
+```
+
+## Deploy function
+### Export secrets
+```
+export TF_VAR_slack_bot_token=XXX
+export TF_VAR_ph_api_token=XXX
+```
+### Deploy
+```
+make deploy
+```
+### Deploy with secrets file
+```
+make deploy-with-secrets-file
+```

main.tf

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+provider "aws" {
+  region = "eu-west-1"
+}
+
+
+module "lambda_function" {
+  source  = "terraform-aws-modules/lambda/aws"
+  version = "2.2.0"
+
+  function_name = var.name
+  description   = "Function to post popular articles to Slack"
+  handler       = "app.lambda_handler"
+  runtime       = "python3.8"
+  timeout       = 30
+
+  source_path = "./src/slacknewsbot"
+
+  environment_variables = {
+    SLACK_CHANNEL   = var.slack_channel_name
+    SLACK_BOT_TOKEN = var.slack_bot_token
+    QUERY_HN        = var.query_hn
+    QUERY_PH        = var.query_ph
+    PH_API_TOKEN    = var.ph_api_token
+    STORIES_NUMBER  = var.stories_number
+  }
+  allowed_triggers = {
+    PostToSlack = {
+      principal  = "events.amazonaws.com"
+      source_arn = aws_cloudwatch_event_rule.cw_cron.arn
+    }
+  }
+  create_current_version_allowed_triggers = false
+
+  tags = {
+    Name = var.name
+  }
+}
+
+# EVENT CONFIG
+resource "aws_cloudwatch_event_rule" "cw_cron" {
+  name        = "${name}-lambda-trigger"
+  description = "Lambda trigge to post to Slack"
+
+  schedule_expression = "cron(0 13 * * ? *)"
+}
+
+resource "aws_cloudwatch_event_target" "trigger_slack" {
+  rule = aws_cloudwatch_event_rule.cw_cron.name
+  arn  = module.lambda_function.lambda_function_arn
+}