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diff --git a/src/include/edoors_particle.h b/src/include/edoors_particle.h
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+/* EDOORS
+ * Copyright (C) 2012 Jérémy Zurcher
+ *
+ * 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; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __EDOORS_PARTICLE_H__
+#define __EDOORS_PARTICLE_H__
+
+#include <time.h>
+#include <eina_hash.h>
+#include <eina_array.h>
+#include <eina_inlist.h>
+#include <eina_stringshare.h>
+
+#include "edoors_iota.h"
+
+/**
+ * @typedef Edoors_Particle
+ * Type for a Particle, holding data and spinning from Iotas to Iotas.
+ */
+typedef struct _Edoors_Particle Edoors_Particle;
+
+/**
+ * @struct _Edoors_Particle
+ * Struct for a Particle, holding data and spinning from Iotas to Iotas.
+ */
+struct _Edoors_Particle {
+    EINA_INLIST;                        /**< the Eina_Inlist info */
+    time_t ts;                          /**< creation time */
+    Edoors_Iota         *src;           /**< where it's born */
+    Edoors_Iota         *dst;           /**< current destination */
+    Eina_Array          *dsts;          /**< array of destinatinon strings */
+    unsigned int        cur_dst;        /**< current destination index */
+    Eina_Stringshare    *cur_action;    /**< action part of the current destination */
+    Eina_Stringshare    *cur_door;      /**< door part of the current destination */
+    Eina_Stringshare    *cur_room;      /**< room part of the current destination */
+    Eina_Hash           *payload;       /**< string data carried by this particle */
+    Eina_Inlist         *merged;        /**< list of merged particles */
+    Eina_Array          *link_fields;   /**< fields used to generate the link value */
+    Eina_Stringshare    *link_value;    /**< computed from link_fields and paylod, used for pearing particles */
+};
+
+/**
+ * @defgroup Edoors_Particle Edoors_Particle
+ *
+ * The central part of Edoors. The Particle holds, the data, the destination list.
+ *
+ * @{
+ */
+
+/**
+ * @brief Free allocated resources.
+ *
+ * @param particle The @ref Edoors_Particle to free.
+ *
+ * This function will free all the merged @ref Edoors_Particle
+ */
+void edoors_particle_free(Edoors_Particle *particle);
+
+/**
+ * @brief Allocate the resources.
+ *
+ * @return the new allocated @ref Edoors_Particle @c NULL on failure
+ */
+Edoors_Particle* edoors_particle_alloc();
+
+/**
+ * @brief Reset the @ref Edoors_Particle so that it can be required later.
+ *
+ * @param particle The @ref Edoors_Particle to reset
+ */
+EAPI void edoors_particle_reset(Edoors_Particle *particle);
+
+/**
+ * @brief Set @c src and @c ts timestamp.
+ *
+ * @param particle The @ref Edoors_Particle to init
+ * @param iota The @ref Edoors_Iota wich will be set as @c src
+ */
+EAPI void edoors_particle_init(Edoors_Particle *particle, Edoors_Iota *iota);
+
+/**
+ * @brief Merge a @ref Edoors_Particle into the other.
+ *
+ * @param particle The @ref Edoors_Particle to hold @p p
+ * @param p The @ref Edoors_Particle to be merged into @p particle
+ */
+EAPI void edoors_particle_merge(Edoors_Particle *particle, const Edoors_Particle *p);
+
+/**
+ * @brief Check if a current destination is defined
+ *
+ * @param particle The @ref Edoors_Particle to check
+ *
+ * @return EINA_TRUE if a current destination is defined, EINA_FALSE otherwise.
+ */
+EAPI Eina_Bool edoors_particle_has_dst(Edoors_Particle *particle);
+
+/**
+ * @brief Point to the next destination
+ *
+ * @param particle The @ref Edoors_Particle to mofify
+ *
+ * @return EINA_TRUE if next destination is defined, EINA_FALSE otherwise.
+ */
+EAPI Eina_Bool edoors_particle_next_dst(Edoors_Particle *particle);
+
+/**
+ * @brief Split current destination in room ; door ; action Eina_Stringshare
+ *
+ * @param particle The @ref Edoors_Particle to split current destination
+ *
+ */
+EAPI void edoors_particle_split_dst(Edoors_Particle *particle);
+
+/**
+ * @brief Add a destination and set it as current
+ *
+ * @param particle The @ref Edoors_Particle to add destination to
+ * @param destination The destination to add and set as current
+ */
+EAPI void edoors_particle_destination_set(Edoors_Particle *particle, const char *destination);
+
+/**
+ * @brief Add destinations to the @ref Edoors_Particle
+ *
+ * @param particle The @ref Edoors_Particle to add destinations to
+ * @param destinations A comma separated list of destination "/room0/room1/.../doorx?action"
+ *
+ * This function will append each destination found to the destination list of the @ref Edoors_Particle.
+ */
+EAPI void edoors_particle_destinations_add(Edoors_Particle *particle, const char *destinations);
+
+/**
+ * @brief Set the link fields
+ *
+ * @param particle The @ref Edoors_Particle to set the link fields to
+ * @param link_fields A comma separated list of fields name
+ *
+ */
+EAPI void edoors_particle_link_fields_set(Edoors_Particle *particle, const char *link_fields);
+
+/**
+ * @brief Restore the data associated to a given key
+ *
+ * @param particle The @ref Edoors_Particle to restore data from
+ * @param key The Eina_Hash key
+ *
+ * @return The data stored on success, NULL otherwise.
+ */
+EAPI const char* edoors_particle_data_get(Edoors_Particle *particle, const char *key);
+
+/**
+ * @brief Store a key:value data couple into the Edoors_Particle
+ *
+ * @param particle The @ref Edoors_Particle to store data into
+ * @param key The Eina_Hash key
+ * @param value The value to store
+ *
+ * @return EINA_FALSE if an error occurred, EINA_TRUE otherwise.
+ */
+EAPI Eina_Bool edoors_particle_data_set(Edoors_Particle *particle, const char *key, const char *value);
+
+/**
+ * @brief Delete the data associated to a given key
+ *
+ * @param particle The @ref Edoors_Particle to delete data from
+ * @param key The Eina_Hash key
+ *
+ * @return EINA_FALSE if an error occurred, EINA_TRUE otherwise.
+ */
+EAPI Eina_Bool edoors_particle_data_del(Edoors_Particle *particle, const char *key);
+
+/**
+ * @brief Check if two @ref Edoors_Particle have the same link_value
+ *
+ * @param particle The @ref Edoors_Particle to compare with
+ * @param p The @ref Edoors_Particle to compare with
+ *
+ * @return EINA_TRUE if the link value is the same, EINA_FALSE otherwise.
+ */
+EAPI Eina_Bool edoors_particle_match(Edoors_Particle *particle, const Edoors_Particle *p);
+
+/**
+ * @}
+ */
+
+#endif // __EDOORS_PARTICLE_H__