/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"
#include "nsIClickRule.idl"
#include "nsICookieBannerRule.idl"
#include "nsICookieRule.idl"
#include "nsIURI.idl"
webidl BrowsingContext;

/**
 * Service singleton which owns the cookie banner feature.
 * This service owns the cookie banner handling rules.
 * It initializes both the component for importing rules
 * (nsICookieBannerListService) and injecting cookies (nsICookieInjector).
 */
[scriptable, uuid(eac9cdc4-ecee-49f2-91da-7627e15c1f3c)]
interface nsICookieBannerService : nsISupports {

  /**
   * Modes for cookie banner handling
   * MODE_DISABLED - No cookie banner handling, service disabled.
   * MODE_REJECT - Only handle banners where selecting "reject all" is possible.
   * MODE_REJECT_OR_ACCEPT - Prefer selecting "reject all", if not possible
   * fall back to "accept all".
   * MODE_UNSET - This represents the service mode is unset, the setting should
   * fall back to default setting. This is used for the per-domain preferences.
   */
  cenum Modes : 8 {
    MODE_DISABLED,
    MODE_REJECT,
    MODE_REJECT_OR_ACCEPT,
    MODE_UNSET,
  };

  /**
   * Whether the feature / service is enabled.
   */
  readonly attribute boolean isEnabled;

  /**
   * Getter for a list of all cookie banner rules. This includes both opt-in and opt-out rules.
   */
  readonly attribute Array<nsICookieBannerRule> rules;

  /**
   * Clears all imported rules. They will be imported again on startup and when
   * enabling the service. This is currently only used for testing.
   *
   * doImport - Whether to import initial rule list after reset. Passing false
   * will result in an empty rule list.
   */
  void resetRules([optional] in boolean doImport);

  /**
   * Look up all cookie rules for a given top-level URI. Depending on the MODE_
   * this will return none, only reject rules or accept rules if there is no
   * reject rule available.
   */
  Array<nsICookieRule> getCookiesForURI(in nsIURI aURI, in bool aIsPrivateBrowsing);

  /**
   * Look up the click rules for a given domain.
   */
  Array<nsIClickRule> getClickRulesForDomain(in ACString aDomain,
                                             in bool aIsTopLevel);

  /**
   * Insert a cookie banner rule for a domain. If there was previously a rule
   * stored with the same domain it will be overwritten.
   */
  void insertRule(in nsICookieBannerRule aRule);

  /**
   * Remove a cookie banner rule.
   */
  void removeRule(in nsICookieBannerRule aRule);

  /**
   * Computes whether we have a rule for the given browsing context or any of
   * its children. This takes the current cookie banner service mode into
   * consideration and whether the BC is in private browsing mode.
   *
   * This method only takes the global service mode into account. It will ignore
   * any per-site mode overrides. It is meant for callers to find out whether an
   * applicable rule exists, even if users have disabled the feature for the
   * given site.
   */
  boolean hasRuleForBrowsingContextTree(in BrowsingContext aBrowsingContext);

  /**
   * Get the domain preference of the given top-level URI. It will return the
   * service mode if there is a site preference for the given URI. Otherwise, it
   * will return MODE_UNSET.
   */
  nsICookieBannerService_Modes getDomainPref(in nsIURI aTopLevelURI,
                                             in boolean aIsPrivate);

  /**
   * Set the domain preference of the given top-level URI.
   */
  void setDomainPref(in nsIURI aTopLevelURI,
                     in nsICookieBannerService_Modes aMode,
                     in boolean aIsPrivate);

  /**
   * Set the domain preference of the given top-level URI. It will persist the
   * domain preference for private browsing.
   *
   * WARNING: setting permanent domain preference _will_ leak data in private
   * browsing. Only use if you understand the consequences and trade-offs. If
   * you are unsure, |setDomainPref| is very likely what you want to use
   * instead.
   */
  void setDomainPrefAndPersistInPrivateBrowsing(in nsIURI aTopLevelURI,
                                                in nsICookieBannerService_Modes aMode);

  /**
   * Remove the domain preference of the given top-level URI.
   */
  void removeDomainPref(in nsIURI aTopLevelURI, in boolean aIsPrivate);

  /**
   * Remove all domain preferences.
   */
  void removeAllDomainPrefs(in boolean aIsPrivate);

  /**
   * Clears the in-memory set that we use to maintain the domains that we have
   * reported telemetry. This function will clear the entry for the given
   * domain. If the domain was not given, it will clear all set.
   */
  void resetDomainTelemetryRecord([optional] in ACString aDomain);
};