Bete

Bus Eta Bot's secret identity

Developing

Running tests

• The DATABASE_URL should be set appropriately.
• For a local database: env DATABASE_URL='postgres://localhost/bete_test?sslmode=disable' go test ./...

Testing with a real bot

• Create a new bot with @BotFather on Telegram and obtain a bot token.
• Request for API access to LTA DataMall and obtain an account key.
• Build the server binary: make
• Run the server with the DATAMALL_ACCOUNT_KEY, TELEGRAM_BOT_TOKEN and DATABASE_URL environment variables:

env DATABASE_URL='postgres://localhost/bete_test?sslmode=disable' DATAMALL_ACCOUNT_KEY='xxx' TELEGRAM_BOT_TOKEN='xxx' bin/bete

• Start a separate ngrok process to expose the server: ngrok http 8080
• Set the bot webhook to the public ngrok URL (use the HTTPS one). Note that the path should be /telegram/updates

curl https://api.telegram.org/bot$bot_token/setWebhook?url=https://xxx/telegram/updates

• Find your bot on Telegram and chat with it, you should see HTTP requests logged by ngrok and bete.
• For convenience, the Makefile contains a start target to build and run the server, and a webhook target to automatically set the webhook. These both need the appropriate environment variables to be set.

Generating mocks

• Install mockgen binary to bin/mockgen: GOBIN=$PWD/bin go get github.com/golang/mock/mockgen
• Generate mocks: go generate

Database migrations

• Install migrate binary to bin/migrate: GOBIN=$PWD/bin go get -tags postgres github.com/golang-migrate/migrate/v4/cmd/migrate
• The postgres tag is needed to run migrations against Postgres.
• To generate new migrations: bin/migrate create -dir migrations -ext sql MIGRATION_NAME
• To run migrations: bin/migrate -path migrations -database 'postgres://localhost/bete_test?sslmode=disable' up