/**
 * @file llgesture.h
 * @brief A gesture is a combination of a triggering chat phrase or
 * key, a sound, an animation, and a chat string.
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLGESTURE_H
#define LL_LLGESTURE_H

#include "llanimationstates.h"
#include "lluuid.h"
#include "llstring.h"

class LLGesture
{
public:
    LLGesture();
    LLGesture(KEY key, MASK mask, const std::string &trigger,
        const LLUUID &sound_item_id, const std::string &animation,
        const std::string &output_string);

    LLGesture(U8 **buffer, S32 max_size); // deserializes, advances buffer
    LLGesture(const LLGesture &gesture);
    const LLGesture &operator=(const LLGesture &rhs);

    virtual ~LLGesture() {};

    // Accessors
    KEY                 getKey() const          { return mKey; }
    MASK                getMask() const         { return mMask; }
    const std::string&  getTrigger() const      { return mTrigger; }
    const LLUUID&       getSound() const        { return mSoundItemID; }
    const std::string&  getAnimation() const    { return mAnimation; }
    const std::string&  getOutputString() const { return mOutputString; }

    // Triggers if a key/mask matches it
    virtual bool trigger(KEY key, MASK mask);

    // Triggers if case-insensitive substring matches (assumes string is lowercase)
    virtual bool trigger(const std::string &string);

    // non-endian-neutral serialization
    U8 *serialize(U8 *buffer) const;
    U8 *deserialize(U8 *buffer, S32 max_size);
    static S32 getMaxSerialSize();

protected:
    KEY             mKey;           // usually a function key
    MASK            mMask;          // usually MASK_NONE, or MASK_SHIFT
    std::string     mTrigger;       // string, no whitespace allowed
    std::string     mTriggerLower;  // lowercase version of mTrigger
    LLUUID          mSoundItemID;   // ItemID of sound to play, LLUUID::null if none
    std::string     mAnimation;     // canonical name of animation or face animation
    std::string     mOutputString;  // string to say

    static const S32    MAX_SERIAL_SIZE;
};

class LLGestureList
{
public:
    LLGestureList();
    virtual ~LLGestureList();

    // Triggers if a key/mask matches one in the list
    bool trigger(KEY key, MASK mask);

    // Triggers if substring matches and generates revised string.
    bool triggerAndReviseString(const std::string &string, std::string* revised_string);

    // Used for construction from UI
    S32 count() const                       { return static_cast<S32>(mList.size()); }
    virtual LLGesture* get(S32 i) const     { return mList.at(i); }
    virtual void put(LLGesture* gesture)    { mList.push_back( gesture ); }
    void deleteAll();

    // non-endian-neutral serialization
    U8 *serialize(U8 *buffer) const;
    U8 *deserialize(U8 *buffer, S32 max_size);
    S32 getMaxSerialSize();

protected:
    // overridden by child class to use local LLGesture implementation
    virtual LLGesture *create_gesture(U8 **buffer, S32 max_size);

protected:
    std::vector<LLGesture*> mList;

    static const S32    SERIAL_HEADER_SIZE;
};

#endif