Implements a Social Media model with both followers and emotions. More...

Inheritance diagram for SM_wf_emotions:

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Collaboration diagram for SM_wf_emotions:

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Classes
struct	default_media_user
	Implements the default_media_user that handles both followers and emotions. More...

Public Member Functions
void	initialize (void) override

void	communicate (const InteractionMessage &msg) override

void	cleanup () override

InteractionItem	convert_to_InteractionItem (media_event *_event, unsigned int sender_index, unsigned int receiver_index) const override

int	get_feed_priority (const media_event &_event, unsigned int user) override

	SM_wf_emotions (const std::string &_media_name, InteractionItem::item_keys event_key, const dynet::ParameterMap &params, Construct &construct)

Social_Media_no_followers::media_user *	get_default_media_user (const Node &node) override

Public Member Functions inherited from Social_Media_with_followers
Social_Media_with_followers::media_user &	user (unsigned int index)

Social_Media_no_followers::media_user *	get_default_media_user (const Node &node) override
	Gets the default media user for a social media class. More...

	Social_Media_with_followers (const std::string &_media_name, InteractionItem::item_keys event_key, const dynet::ParameterMap &parameters, Construct &_construct)
	Base constructor for any social media model. More...

void	communicate (const InteractionMessage &msg) override
	Calls Social_Media_no_followers::communicate and for each read event, the receiving agent can follow the sending agent. More...

void	cleanup (void) override
	Feeds are updated, the social media will recommend users to follow, and users can decide to unfollow other users. More...

float	follower_jaccard_similarity (unsigned int agent_i, unsigned int agent_j) const
	Computes the Jaccard Similarity in the follower network between the two agent indexes.

virtual void	add_followees (void)
	Gives each user recommended users to follow. More...

virtual void	remove_followees (void)
	Each users decides whether to unfollow any other user. More...

virtual int	get_feed_priority (const media_event &_event, unsigned int user) override
	If Social_Media_no_followers::get_feed_priority returns a value greater than 50 and the user is following the event's author, 50 is returned. Otherwise, the result from Social_Media_no_followers::get_feed_priority is returned. More...

Public Member Functions inherited from Social_Media_no_followers
void	load_events (const std::string &fname, const dynet::datetime &start_time, float time_conversion, const std::map< std::string, unsigned int > &agent_mask=std::map< std::string, unsigned int >())
	Parses the content of a json file and loads the information into Social_Media_no_followers::list_of_events. More...

virtual media_event *	create_post (unsigned int knowledge_index, unsigned int id)
	Creates a post event and adds it to Social_Media_no_followers::list_of_events. More...

virtual media_event *	create_response (unsigned int id, media_event *parent)
	Creates a response event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...

virtual media_event *	create_quote (unsigned int id, media_event *parent)
	Creates a quote event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...

virtual media_event *	create_reply (unsigned int id, media_event *parent)
	Creates a reply event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...

virtual media_event *	create_repost (unsigned int id, media_event *parent)
	Creates a quote event based on the parent event and adds it to Social_Media_no_followers::list_of_events. More...

virtual void	finalize_event (media_event *_event)
	Allows each model to intercept the created event. More...

void	check_list_order () const
	Checks the list of events to make sure the time stamps are sorted in descending order. More...

Social_Media_no_followers::media_user &	user (unsigned int index)

	Social_Media_no_followers (const std::string &_media_name, InteractionItem::item_keys event_key, const dynet::ParameterMap &parameters, Construct &_construct)
	Base constructor for any social media model. More...

virtual	~Social_Media_no_followers ()
	All pointers in Social_Media_with_followers::users are deallocated.

virtual media_user *	get_default_media_user (const Node &node)
	Gets the default media user for a social media class. More...

void	think (void) override
	Agents read events in their feed and create messages based on the read events. More...

void	initialize (void) override
	Loads users using Social_Media_no_followers::load_user and adds Knowledge_Parser to Construct::message_parsers if one is not present. More...

void	communicate (const InteractionMessage &msg) override
	Parses messages that contain the Social_Media_no_followers::event key in their attributes. If the event contains the attribute, media_user::(read, reply, quote, and repost) are called from the receiver's index in Social_Media_no_followers::users More...

void	cleanup (void) override
	Feeds are updated, list_of_events::removed_events are cleared, and events are erased from list_of_events that have have become inactive. More...

virtual void	append_message (media_event *_event, InteractionMessage &msg)
	Appends the array of InteractionItems based on the submitted event and the intended receiver of the message. More...

virtual InteractionItem	convert_to_InteractionItem (media_event *_event, unsigned int sender_index, unsigned int receiver_index) const
	Copies some or all information from the submitted event based on the sender's and receiver's node attributes. More...

virtual int	get_feed_priority (const media_event &_event, unsigned int user)
	Returns 10 if the user is mentioned by the event or if the event is a reply to an event authored by the user. Returns 100 otherwise. More...

virtual void	update_event_scores ()
	Goes through all events and updates media_event::score to media_event::child_size * media_event::time_stamp. More...

virtual void	random_event_swapping (unsigned int user_index)
	Randomly swaps 10% of events in the user's feed. More...

virtual void	update_feeds (float new_events_timestamp)
	Updates each user's feeds. More...

template<typename function >
auto	get_events (function filter)

Public Member Functions inherited from Model
	Model (Construct &_construct)
	Constructor for all models in Construct. More...

virtual	~Model (void)
	Virtual Deconstructor. More...

virtual void	initialize (void)
	Function called once before any simulation cycles begin. More...

virtual void	think (void)
	First function called in a simulation cycle. More...

virtual void	update (void)
	Function called after the think functions in a simulation cycle. More...

virtual bool	intercept (InteractionItem &item, unsigned int sender, unsigned int receiver, const CommunicationMedium *medium)
	Allows for models to effect change to items created by other models. More...

virtual void	communicate (const InteractionMessage &msg)
	Function called after the update functions in a simulation cycle. More...

virtual void	cleanup (void)
	Function called after the Model::communicate functions in a simulation cycle. More...

void	add_base_model_to_model_manager (const std::string &base_model_name)
	Adds a derived model under the name of the base model and disables the model manager from calling its functions.

Public Member Functions inherited from SM_nf_emotions
	SM_nf_emotions (const std::string &_media_name, InteractionItem::item_keys event_key, const dynet::ParameterMap &params, Construct &construct)

Social_Media_no_followers::media_user *	get_default_media_user (const Node &node) override

InteractionItem	convert_to_InteractionItem (media_event *_event, unsigned int sender_index, unsigned int receiver_index) const override

Additional Inherited Members
Public Attributes inherited from Social_Media_with_followers
std::vector< std::vector< unsigned int > >	responses
	Holds the number of responses between agents. More...

Graph< bool > *	follower_net = nullptr
	The follower network for the social media with name dependent on the media.

Graph< float > *	ktrust_net = nullptr
	Pointer to the graph with name "knowledge trust network".

Graph< std::map< unsigned int, float > > *	kttm = nullptr
	Pointer to the graph with name "knowledge trust transactive memory network". More...

bool	disable_follower_recommendations = false

std::function< void(Social_Media_with_followers *, unsigned int)>	add_followees_output

Public Attributes inherited from Social_Media_no_followers
event_container	list_of_events
	The list of all current events in this social media. New events should be added to the front of this list.

const Nodeset &	agents = ns_manager.get_nodeset(nodeset_names::agents)

const Nodeset &	knowledge = ns_manager.get_nodeset(nodeset_names::knowledge)

const CommunicationMedium	medium
	The medium used for all messages created by this model.

const InteractionItem::item_keys	event_key
	The item key added to all messages created by this model.

std::vector< std::vector< media_event * > >	users_feed
	Each user's feed of events with the first dimension corresponding to each user. More...

std::vector< unsigned int >	read_count

float	age
	The maximum time a post can exist without its tree being added to.

float	dt
	The time duration between time steps.

float	time = 0.0f
	The current time period.

std::string	media_name
	The prefix for some of the node attributes names parsed by the media_user class.

Graph< bool > &	knowledge_net = graph_manager.load_required(graph_names::knowledge, agents, knowledge)
	Pointer to the graph with name "knowledge network".

const Graph< bool > *	active_agents = graph_manager.load_optional(graph_names::active, true, agents, sparse, ns_manager.get_nodeset(nodeset_names::time), sparse)
	Pointer to the graph with name "agent active time network".

std::vector< media_user * >	users
	The list of users. More...

std::function< bool(media_event &)>	current_timestep = [this](media_event& _event) { return _event.time_stamp > time - 0.5f * dt; }

std::function< bool(media_event &)>	previous_timestep = [this](media_event& _event) { return _event.time_stamp > time - 1.5f * dt; }

std::function< bool(media_event &)>	active = [this](media_event& _event) { return _event.last_used > time - age; }

std::function< void(Social_Media_no_followers *, unsigned int)>	feed_update_output

std::function< void(Social_Media_no_followers *)>	cleanup_output

Public Attributes inherited from Model
Construct &	construct

GraphManager &	graph_manager

NodesetManager &	ns_manager

Random &	random

bool	valid
	If member is false, the model's functions are not called.

Public Attributes inherited from SM_nf_emotions
const Nodeset *	emotions = ns_manager.get_nodeset(nodeset_names::emotions)

const Graph< float > &	emotion_net = graph_manager.load_required(graph_names::emotion_net, agents, emotions)

const Graph< float > &	emot_broadcast_bias = graph_manager.load_optional(graph_names::emot_broad_bias, 1.0f, agents, false, emotions, false)
	The base probability an agent attaches an emotion. More...

const Graph< float > &	emot_broadcast_first = graph_manager.load_optional(graph_names::emot_broad_first, 0.0f, emotions, false, emotions, false)
	The first order emotional dependence on the probability an agent attaches an emotion. More...

const Graph< std::map< unsigned int, float > > &	emot_broadcast_second
	The second order emotional dependence on the probability an agent attaches an emotion. More...

const Graph< float > &	pd_emotion_first = graph_manager.load_optional("first order post density emotion network", 0.0f, agents, false, emotions, false)
	The first order emotional dependence on the probability density for how many posts an agent creates each timestep. More...

const Graph< float > &	pd_emotion_second = graph_manager.load_optional("second order post density emotion network", 0.0f, emotions, false, emotions, false)
	The second order emotional dependence on the probability density for how many posts an agent creates each timestep. More...

const Graph< float > &	pr_emotion_first = graph_manager.load_optional("first order reply probability emotion network", 0.0f, agents, false, emotions, false)
	The first order emotional dependence on the probability that an agent replies to an event when reading it. More...

const Graph< float > &	pr_emotion_second = graph_manager.load_optional("second order reply probability emotion network", 0.0f, emotions, false, emotions, false)
	The second order emotional dependence on the probability that an agent replies to an event when reading it. More...

const Graph< float > &	prp_emotion_first = graph_manager.load_optional("first order repost probability emotion network", 0.0f, agents, false, emotions, false)
	The first order emotional dependence on the probability that an agent reposts an event when reading it. More...

const Graph< float > &	prp_emotion_second = graph_manager.load_optional("second order repost probability emotion network", 0.0f, emotions, false, emotions, false)
	The second order emotional dependence on the probability that an agent reposts an event when reading it. More...

const Graph< float > &	pq_emotion_first = graph_manager.load_optional("first order quote probability emotion network", 0.0f, agents, false, emotions, false)
	The first order emotional dependence on the probability that an agent quotes an event when reading it. More...

const Graph< float > &	pq_emotion_second = graph_manager.load_optional("second order quote probability emotion network", 0.0f, emotions, false, emotions, false)
	The second order emotional dependence on the probability that an agent quotes an event when reading it. More...

const Graph< float > &	pread_emotion_first = graph_manager.load_optional("first order read density emotion network", 0.0f, agents, false, emotions, false)
	The first order emotional dependence on the probability density for how many posts an agent reads each timestep. More...

const Graph< float > &	pread_emotion_second = graph_manager.load_optional("second order read density emotion network", 0.0f, emotions, false, emotions, false)
	The second order emotional dependence on the probability density for how many posts an agent reads each timestep. More...

const Graph< float > &	kselect_emotion = graph_manager.load_optional("knowledge select emotion network", 0.0f, knowledge, false, emotions, false)
	The emotional dependence on the probability weight an agent selects a knowledge bit for creating an event. More...

const Graph< float > &	kselect_trust = graph_manager.load_optional("knowledge select trust network", 0.0f, agents, false, knowledge, false)
	The knowledge trust dependence on the probability weight an agent selects a knowledge bit for creating an event. More...

const Graph< float > &	kselect = graph_manager.load_optional("knowledge select bias network", 1.0f, agents, false, knowledge, false)
	The base probability weight an agent selects a knowledge bit for creating an event. More...

Detailed Description

Implements a Social Media model with both followers and emotions.

Member Function Documentation

◆ cleanup()

void SM_wf_emotions::cleanup ( void )

inlineoverridevirtual

summary>

Reimplemented from Model.

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◆ communicate()

void SM_wf_emotions::communicate ( const InteractionMessage & msg )

inlineoverridevirtual

summary>

Reimplemented from Model.

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◆ convert_to_InteractionItem()

InteractionItem SM_wf_emotions::convert_to_InteractionItem	(	media_event *	_event,
		unsigned int	sender_index,
		unsigned int	receiver_index
	)		const

inlineoverridevirtual

summary>

Reimplemented from SM_nf_emotions.

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◆ get_default_media_user()

Social_Media_no_followers::media_user * SM_wf_emotions::get_default_media_user ( const Node & node )

inlineoverridevirtual

summary>

Reimplemented from SM_nf_emotions.

◆ get_feed_priority()

int SM_wf_emotions::get_feed_priority	(	const media_event &	_event,
		unsigned int	user
	)

inlineoverridevirtual

summary>

Reimplemented from Social_Media_with_followers.

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◆ initialize()

void SM_wf_emotions::initialize ( void )

inlineoverridevirtual

summary>

Reimplemented from Model.

Reimplemented in Facebook_wf_emotions, and Twitter_wf_emotions.

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Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ cleanup()

◆ communicate()

◆ convert_to_InteractionItem()

◆ get_default_media_user()

◆ get_feed_priority()

◆ initialize()