/*
 * 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 "nsILoadInfo.idl"

interface nsIURI;
interface nsIInputStream;
interface nsIDNSListener;
webidl BrowsingContext;

/**
 * Interface indicating what we found/corrected when fixing up a URI
 */
[scriptable, uuid(4819f183-b532-4932-ac09-b309cd853be7)]
interface nsIURIFixupInfo : nsISupports
{
  /**
   * Consumer that asked for fixed up URI.
   */
  attribute BrowsingContext consumer;

  /**
   * Our best guess as to what URI the consumer will want. Might
   * be null if we couldn't salvage anything (for instance, because
   * the input was invalid as a URI and FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP
   * was not passed)
   */
  attribute nsIURI preferredURI;

  /**
   * The fixed-up original input, *never* using a keyword search.
   * (might be null if the original input was not recoverable as
   * a URL, e.g. "foo bar"!)
   */
  attribute nsIURI fixedURI;

  /**
   * The id of the search engine used to provide a keyword search;
   * empty string if no keyword search was done.
   */
  attribute AString keywordProviderId;

  /**
   * The keyword as used for the search (post trimming etc.)
   * empty string if no keyword search was done.
   */
  attribute AString keywordAsSent;

  /**
   * Whether there was no protocol at all and we had to add one in the first place.
   */
  attribute nsILoadInfo_SchemelessInputType schemelessInput;

  /**
   * Whether we changed the protocol instead of using one from the input as-is.
   */
  attribute boolean fixupChangedProtocol;

  /**
   * Whether we created an alternative URI. We might have added a prefix and/or
   * suffix, the contents of which are controlled by the
   * browser.fixup.alternate.prefix and .suffix prefs, with the defaults being
   * "www." and ".com", respectively.
   */
  attribute boolean fixupCreatedAlternateURI;

  /**
   * The original input
   */
  attribute AUTF8String originalInput;

  /**
   * The POST data to submit with the returned URI.
   */
  attribute nsIInputStream postData;
};


/**
 * Interface implemented by objects capable of fixing up strings into URIs
 */
[scriptable, uuid(1da7e9d4-620b-4949-849a-1cd6077b1b2d)]
interface nsIURIFixup : nsISupports
{
    /** No fixup flags. */
    const unsigned long FIXUP_FLAG_NONE = 0;

    /**
     * Allow the fixup to use a keyword lookup service to complete the URI.
     * The fixup object implementer should honour this flag and only perform
     * any lengthy keyword (or search) operation if it is set.
     */
    const unsigned long FIXUP_FLAG_ALLOW_KEYWORD_LOOKUP = 1;

    /**
     * Tell the fixup to make an alternate URI from the input URI, for example
     * to turn foo into www.foo.com.
     */
    const unsigned long FIXUP_FLAGS_MAKE_ALTERNATE_URI = 2;

    /*
     * Set when the fixup happens in a private context, the used search engine
     * may differ in this case. Not all consumers care about this, because they
     * may not want the url to be transformed in a search.
     */
    const unsigned long FIXUP_FLAG_PRIVATE_CONTEXT = 4;

    /*
     * Fix common scheme typos.
     */
    const unsigned long FIXUP_FLAG_FIX_SCHEME_TYPOS = 8;

    /**
     * Tries to converts the specified string into a URI, first attempting
     * to correct any errors in the syntax or other vagaries.
     * It returns information about what it corrected
     * (e.g. whether we could rescue the URI or "just" generated a keyword
     * search URI instead).
     *
     * @param aURIText    Candidate URI.
     * @param aFixupFlags Flags that govern ways the URI may be fixed up.
     *                    Defaults to FIXUP_FLAG_NONE.
     */
    nsIURIFixupInfo getFixupURIInfo(in AUTF8String aURIText,
                                    [optional] in unsigned long aFixupFlags);

    /**
     * Convert load flags from nsIWebNavigation to URI fixup flags for use in
     * getFixupURIInfo.
     *
     * @param aURIText       Candidate URI; used for determining whether to
     *                       allow keyword lookups.
     * @param aDocShellFlags Load flags from nsIDocShell to convert.
     */
    unsigned long webNavigationFlagsToFixupFlags(
        in AUTF8String aURIText, in unsigned long aDocShellFlags);

    /**
     * Converts the specified keyword string into a URI.  Note that it's the
     * caller's responsibility to check whether keywords are enabled and
     * whether aKeyword is a sensible keyword.
     *
     * @param aKeyword  The keyword string to convert into a URI
     * @param aIsPrivateContext Whether this is invoked from a private context.
     */
    nsIURIFixupInfo keywordToURI(in AUTF8String aKeyword,
                                 [optional] in boolean aIsPrivateContext);

    /**
     * Given a uri-like string with a protocol, attempt to fix and convert it
     * into an instance of nsIURIFixupInfo.
     *
     * Differently from getFixupURIInfo, this assumes the input string is an
     * http/https uri, and can add a prefix and/or suffix to its hostname.
     *
     * The scheme will be changed to the scheme defined in
     * "browser.fixup.alternate.protocol", which is by default, https.
     *
     * If the prefix and suffix of the host are missing, it will add them to
     * the host using the preferences "browser.fixup.alternate.prefix" and
     * "browser.fixup.alternate.suffix" as references.
     *
     * If a hostname suffix is present, but the URI doesn't contain a prefix,
     * it will add the prefix via "browser.fixup.alternate.prefix"
     *
     * @param aUriString The URI to fixup and convert.
     * @returns nsIURIFixupInfo
     *                   A nsIURIFixupInfo object with the property fixedURI
     *                   which contains the modified URI.
     * @throws NS_ERROR_FAILURE
     *                   If aUriString is undefined, or the scheme is not
     *                   http/https.
     */
    nsIURIFixupInfo forceHttpFixup(in AUTF8String aUriString);

    /**
     * With the host associated with the URI, use nsIDNSService to determine
     * if an IP address can be found for this host. This method will ignore checking
     * hosts that are IP addresses. If the host does not contain any periods, depending
     * on the browser.urlbar.dnsResolveFullyQualifiedNames preference value, a period
     * may be appended in order to make it a fully qualified domain name.
     *
     * @param aURI The URI to parse and pass into the DNS lookup.
     * @param aListener The listener when the result from the lookup is available.
     * @param aOriginAttributes The originAttributes to pass the DNS lookup.
     * @throws NS_ERROR_FAILURE if aURI does not have a displayHost or asciiHost.
     */
    void checkHost(in nsIURI aURI,
                    in nsIDNSListener aListener,
                    [optional] in jsval aOriginAttributes);

    /**
     * Returns true if the specified domain is known and false otherwise.
     * A known domain is relevant when we have a single word and can't be
     * sure whether to treat the word as a host name or should instead be
     * treated as a search term.
     *
     * @param aDomain A domain name to query.
     */
    boolean isDomainKnown(in AUTF8String aDomain);
};
