@opentermsarchive/engine

Open Terms Archive

Services have terms that can change over time. Open Terms Archive enables users rights advocates, regulatory bodies and any interested citizen to follow the changes to these terms by being notified whenever a new version is published, and exploring their entire history.

Les services ont des conditions générales qui évoluent dans le temps. Open Terms Archive permet aux défenseurs des droits des utilisateurs, aux régulateurs et à toute personne intéressée de suivre les évolutions de ces conditions générales en étant notifiée à chaque publication d'une nouvelle version, et en explorant leur historique.

🇫🇷 Manuel en français.

Table of Contents

• How it works
• Exploring the versions history
• Be notified
  • By email
  • By RSS
• Importing as a module
  • CLI
  • Features exposed
    • fetch
    • filter
• Using locally
  • Installing
    • Declarations repository
    • Core
  • Configuring
    • Configuration file
      • Storage repositories
    • Environment variables
  • Running
• Deploying
• Publishing
• Contributing
  • Adding or updating a service
  • Core engine
  • Funding and partnerships
• License

How it works

Note: Words in bold are business domain names.

Services are declared within Open Terms Archive with a declaration file listing all the documents that, together, constitute the terms under which this service can be used. These documents all have a type, such as “terms and conditions”, “privacy policy”, “developer agreement”…

In order to track their changes, documents are periodically obtained by fetching a web location and selecting content within the web page to remove the noise (ads, navigation menu, login fields…). Beyond selecting a subset of a page, some documents have additional noise (hashes in links, CSRF tokens…) that would be false positives for changes. Open Terms Archive thus supports specific filters for each document.

However, the shape of that noise can change over time. In order to recover in case of information loss during the noise filtering step, a snapshot is recorded every time there is a change. After the noise is filtered out from the snapshot, if there are changes in the resulting document, a new version of the document is recorded.

Anyone can run their own private instance and track changes on their own. However, we also publish each version on a public instance that makes it easy to explore the entire history and enables notifying over email whenever a new version is recorded. Users can subscribe to notifications.

Note: For now, when multiple versions coexist, terms are only tracked in their English version and for the European jurisdiction.

Exploring the versions history

We offer a public database of versions recorded each time there is a change in the terms of service and other contractual documents of tracked services: contrib-versions.

From the repository homepage contrib-versions, open the folder of the service of your choice (e.g. WhatsApp).

You will see the set of documents tracked for that service, now click on the document of your choice (e.g. WhatsApp's Privacy Policy). The latest version (updated hourly) will be displayed.

To view the history of changes made to this document, click on History at the top right of the document (for our previous example). The changes are ordered by date, with the latest first.

Click on a change to see what it consists of (for example this one). There are two types of display you can choose from the icons in the gray bar above the document.

• The first one, named source diff (button with chevrons) allows you to display the old version and the new one side by side (for our example). This display has the merit of explicitly showing all additions and deletions.
• The second one, named rich diff (button with a document icon) allows you to unify all the changes in a single document (for our example). The red color shows deleted elements, the yellow color shows modified paragraphs, and the green color shows added elements. Be careful, this display does not show some changes such as hyperlinks and text style's changes.

Notes

• For long documents, unchanged paragraphs will not be displayed by default. You can manually make them appear by clicking on the small arrows just above or just below the displayed paragraphs.
• You can use the History button anywhere in the repository contrib-versions, which will then display the history of changes made to all documents in the folder where you are (including sub-folders).

Be notified

By email

Document per document

You can go on the official front website opentermsarchive.org. From there, you can select a service and then the corresponding document type. After you enter your email and click on subscribe, we will add your email to the correspondning mailing list in SendInBlue and will not store your email anywhere else. Then, everytime a modification is found on the correspondning document, we will send you an email.

You can unsubscribe at any moment by clicking on the unsubscribe link at the bottom of the received email.

For all documents at once

You can subscribe to receive an email whenever a document is updated in the database.

Beware, you are likely to receive a large amount of notifications! You can unsubscribe by replying to any email you will receive.

By RSS

You can receive notification for a specific service or document by subscribing to RSS feeds.

An RSS feed is a type of web page that contains information about the latest content published by a website, such as the date of publication and the address where you can view it. When this resource is updated, a feed reader app automatically notifies you and you can see the update.

To find out the address of the RSS feed you want to subscribe to:

1. Navigate to the page with the history of changes you are interested in. In the WhatsApp example above, this would be this page.
2. Copy the address of that page from your browser’s address bar. In the WhatsApp example, this would be https://github.com/OpenTermsArchive/contrib-versions/commits/main/WhatsApp/Privacy%20Policy.md.
3. Append .atom at the end of this address. In the WhatsApp example, this would become https://github.com/OpenTermsArchive/contrib-versions/commits/main/WhatsApp/Privacy%20Policy.md.atom.
4. Subscribe your RSS feed reader to the resulting address.

Recap of available RSS feeds

Updated for	URL
all services and documents	https://github.com/OpenTermsArchive/contrib-versions/commits.atom
all the documents of a service	Replace $serviceId with the service ID: https://github.com/OpenTermsArchive/contrib-versions/commits/main/$serviceId.atom.
a specific document of a service	Replace $serviceId with the service ID and $documentType with the document type: https://github.com/OpenTermsArchive/contrib-versions/commits/main/$serviceId/$documentType.md.atom

For example:

• To receive all updates of Facebook documents, the URL is https://github.com/OpenTermsArchive/contrib-versions/commits/main/Facebook.atom.
• To receive all updates of the Privacy Policy from Google, the URL is https://github.com/OpenTermsArchive/contrib-versions/commits/main/Google/Privacy%20Policy.md.atom.

Importing as a module

Open Terms Archive exposes a JavaScript API to make some of its capabilities available in NodeJS. You can install it as an NPM module:

npm install "ambanum/OpenTermsArchive#main"

CLI

The following commands are available where the package is installed:

• ./node_modules/.bin/ota-lint-declarations: check and normalise the format of declarations.
• ./node_modules/.bin/ota-validate-declarations: validate declarations.
• ./node_modules/.bin/ota-track: track services. Recorded snapshots and versions will be stored in the data folder at the root of the module where the package is installed.

In order to have them available globally in your command line, install it with the --global option.

Features exposed

fetch

The fetch module gets the MIME type and content of a document from its URL.

You can use it in your code by using import fetch from 'open-terms-archive/fetch';.

Documentation on how to use fetch is provided as JSDoc within ./src/archivist/fetcher/index.js.

If you plan to use executeClientScripts as a parameter of fetch, the fetching will be done using a headless browser. In order to not instantiate this browser at each fetch, the starting and stopping of the browser is your responsibility.

Here is an example on how to use it:

import fetch, { launchHeadlessBrowser, stopHeadlessBrowser } from 'open-terms-archive/fetch';

await launchHeadlessBrowser();
await fetch({ executeClientScripts: true, ... });
await fetch({ executeClientScripts: true, ... });
await fetch({ executeClientScripts: true, ... });
await stopHeadlessBrowser();

The fetch module can also be configured as a node-config submodule. If node-config is used in the project, the default fetcher configuration can be overridden by adding a fetcher object to the local config. See Configuration file for full reference.

filter

The filter module transforms HTML or PDF content into a Markdown string. It will filter content based on the document declaration.

You can use the filter in your code by using import filter from 'open-terms-archive/filter';.

The filter function documentation is available as JSDoc within ./src/archivist/filter/index.js.

page-declaration

PageDeclaration object is used to describe a page to be tracked by Open Terms Archive.

You can use the page-declaration in your code by using import pageDeclaration from 'open-terms-archive/page-declaration';.

Using locally

Installing

This module is built with Node and is tested on macOS, UNIX and Windows. You will need to install Node >= v16.x to run it.

Declarations repository

1. Locally clone your declarations repository, e.g., [e-mail]:OpenTermsArchive/contrib-declarations.git.
2. Go into your folder and initialize it, e.g., cd contrib-declarations; npm install.
3. You can now modify your declarations in the ./declarations/ folder, following these instructions.
4. When you want to test:
   • If you want to test every declaration, run npm test.
   • If you want to test a specific declaration, run npm test $serviceId, e.g., npm test HER.
   • If you want to have faster feedback on the structure of a specific declaration, run npm run test:schema $serviceId, e.g., npm run test:schema HER.
5. Once you have done that, if you have any error, it will be prompted and detailed at the end of the test.
   • E.g., InaccessibleContentError: Your selector is wrong and should be fixed.
   • E.g., TypeError: The file declaration is invalid.
   • E.g., if you have a weird error, you may want to contact OTA, if may be a bug.

Note: Testing

Testing works with multiple tests (e.g., checking the validity of the file, that the URL is correct and reachable, that the content is correctly gathered, etc.); as it may take a bit of time, that's why you may want to use npm run test:schema.

Core

When refering to the base folder, it means the folder where you will be git pulling everything.

1. If not done already, follow the previous part with the repo of your choice.
2. In the base folder of the previous step (i.e., not in the previous folder, but where the previous folder is), clone the core engine: git clone [e-mail]:ambanum/OpenTermsArchive.git.
3. Go into the cloned folder and install dependencies: cd contrib-declarations; npm install.
4. If you are using the main repo, you are done, go to step 6.
5. If you are using a special repo instance (e.g., dating-declarations), create a new config file, config/development.json, and add:

   {
   
     "services": {
       "declarationsPath": "../<name of the repo>/declarations"
     }
   }
   

   e.g.,

   {
     "services": {
       "declarationsPath": "../dating-declarations/declarations"
     }
   }
   

6. In the folder of the repo (i.e., OpenTermsArchive), use npm start.
   • It will first do a refiltering to check whenever everything works properly.
   • You will then start to see everything being downloaded under data/.
   • More details in Running.

Notes: Tips

• You may want to regularly git pull to have the latest updates, both in the core engine and in the declarations repos.
• You have to npm install in the declarations repo at least once, and a least once each time package.json changes.
• Be careful, it doesn't download the history! If you want that, you need to git clone snapshots and versions in data/.

You can clone as many declarations repositories as you want. The one that will be loaded at execution will be defined through configuration.

Configuring

Configuration file

The default configuration can be found in config/default.json. The full reference is given below. You are unlikely to want to edit all of these elements.

{
  "services": {
    "declarationsPath": "Directory containing services declarations and associated filters"
  },
  "recorder": {
    "versions": {
      "storage": {
        "<storage-repository>": "Storage repository configuration object; see below"
      }
    },
    "snapshots": {
      "storage": {
        "<storage-repository>": "Storage repository configuration object; see below"
      }
    }
  },
  "fetcher": {
    "waitForElementsTimeout": "Maximum time (in milliseconds) to wait for elements to be present in the page when fetching document in a headless browser"
    "navigationTimeout": "Maximum time (in milliseconds) to wait for page to load",
    "language": "Language (in ISO 639-1 format) to pass in request headers"
  },
  "notifier": { // Notify specified mailing lists when new versions are recorded
    "sendInBlue": { // SendInBlue API Key is defined in environment variables, see the “Environment variables” section below
      "updatesListId": "SendInBlue contacts list ID of persons to notify on document updates",
      "updateTemplateId": "SendInBlue email template ID used for updates notifications"
    }
  },
  "logger": { // Logging mechanism to be notified upon error
    "smtp": {
      "host": "SMTP server hostname",
      "username": "User for server authentication" // Password for server authentication is defined in environment variables, see the “Environment variables” section below
    },
    "sendMailOnError": { // Can be set to `false` if you do not want to send email on error
      "to": "The address to send the email to in case of an error",
      "from": "The address from which to send the email",
      "sendWarnings": "Boolean. Set to true to also send email in case of warning",
    }
  },
  "tracker": { // Tracking mechanism to create GitHub issues when document content is inaccessible
    "githubIssues": {
      "repository": "GitHub repository where to create isssues",
      "label": {
        "name": "Label to attach to bot-created issues. This specific label will be created automatically in the target repository",
        "color": "The hexadecimal color code for the label, without the leading #",
        "description": "A short description of the label"
      }
    }
  },
  "dataset": { // Release mechanism to create dataset periodically
    "title": "Title of the dataset; recommended to be the name of the instance that generated it",
    "versionsRepositoryURL": "GitHub repository where the dataset will be published as a release; recommended to be the versions repository for discoverability and tagging purposes"
  }
}

The default configuration is merged with (and overridden by) environment-specific configuration that can be specified at startup with the NODE_ENV environment variable. For example, you would run NODE_ENV=development npm start to load the development.json configuration file.

If you want to change your local configuration, we suggest you create a config/development.json file with overridden values. Example production configuration files can be found in the config folder.

Storage repositories

Two storage repositories are currently supported: Git and MongoDB. Each one can be used independently for versions and snapshots.

Git

{
  …
  "storage": {
    "git": {
      "path": "Versions database directory path, relative to the root of this project",
      "publish": "Boolean. Set to true to push changes to the origin of the cloned repository at the end of every run. Recommended for production only.",
      "snapshotIdentiferTemplate": "Text. Template used to explicit where to find the referenced snapshot id. Must contain a %SNAPSHOT_ID that will be replaced by the snapshot ID. Only useful for versions",
      "author": {
        "name": "Name to which changes in tracked documents will be credited",
        "email": "Email to which changes in tracked documents will be credited"
      }
    }
  }
  …
}

MongoDB

{
    …
  "storage": {
    "mongo": {
      "connectionURI": "URI for defining connection to the MongoDB instance. See https://docs.mongodb.com/manual/reference/connection-string/",
      "database": "Database name",
      "collection": "Collection name"
    }
  }
  …
}

Environment variables

Environment variables can be passed in the command-line or provided in a .env file at the root of the repository. See .env.example for an example of such a file.

• SMTP_PASSWORD: a password for email server authentication, in order to send email notifications.
• SENDINBLUE_API_KEY: a SendInBlue API key, in order to send email notifications with that service.
• GITHUB_TOKEN: a token with repository privileges to access the GitHub API.

If your infrastructure requires using an outgoing HTTP/HTTPS proxy to access the Internet, you can provide it through the HTTP_PROXY and HTTPS_PROXY environment variable.

Running

To get the latest versions of all documents:

npm start

The latest version of a document will be available in the versions path defined in your configuration, under $versions_folder/$service_provider_name/$document_type.md.

To update documents automatically:

npm run start:scheduler

To get the latest version of a specific service's terms:

npm start -- --services <service_id>

The service ID is the case sensitive name of the service declaration file without the extension. For example, for Twitter.json, the service ID is Twitter.

To get the latest version of a specific service's terms and document type:

npm start -- --services <service_id> --documentTypes <document_type>

To display help:

npm start -- --help

Deploying

See Ops Readme.

Publishing

To generate a dataset:

npm run dataset:generate

To release a dataset:

npm run dataset:release

To weekly release a dataset:

npm run dataset:scheduler

Contributing

Thanks for wanting to contribute! There are different ways to contribute to Open Terms Archive. We describe the most common below. If you want to explore other venues for contributing, please contact us over email (contact@[our domain name]) or Twitter.

Adding a new service or updating an existing service

See the CONTRIBUTING of repository OpenTermsArchive/contrib-declarations. You will need knowledge of JSON and web DOM.

Core engine

To contribute to the core engine of Open Terms Archive, see the CONTRIBUTING file of this repository. You will need knowledge of JavaScript and NodeJS.

Funding and partnerships

Beyond individual contributions, we need funds and committed partners to pay for a core team to maintain and grow Open Terms Archive. If you know of opportunities, please let us know! You can find on our website an up-to-date list of the partners and funders that make Open Terms Archive possible.

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License

The code for this software is distributed under the European Union Public Licence (EUPL) v1.2. Contact the author if you have any specific need or question regarding licensing.