Abstract: According to an aspect, a method includes receiving, over a network, a conversation view request to retrieve messages from a conversation graph stored on a messaging platform from a first user account, generating a ranked list of messages for at least a portion of the messages from the conversation graph, identifying, from the ranked list of messages, a message authored by a second user account having an indirect relationship to the first user account in an engagement graph, selecting a social context object for the message based on a type of the indirect relationship, and transmitting, over the network, information to display the message and the social context object, the social context object providing information about the type of the indirect relationship.

Abstract: According to an aspect, a messaging system comprising at least one processor and a non-transitory computer-readable medium storing executable instructions that when executed by the at least one processor cause the at least one processor to obtain a system load metric associated with a messaging platform, compute a pruning factor based on the system load metric, rank messages of a conversation graph using a plurality of first signals to form an intermediate ranked list, prune the intermediate rank list according to the pruning factor to obtain a candidate subset of messages, rank the candidate subset of messages using a plurality of second signals to form a ranked list of messages, and transmit, over a network, information to render at least a portion of the ranked list on a client application.

Abstract: Methods and systems for generating, identifying, and displaying message threads on a social messaging platform. One of the methods includes receiving a first and second messages posted to a social messaging platform by a user account; determining whether the second message is a reply to the first message posted by the user account; in response, determining if the first message is part of an existing message thread; in response to determining that the first message is not part of an existing thread, assigning a new thread identifier to both the first message and the second message, the thread identifier associating both messages with a new thread; in response to determining that the first message is part of an existing thread, assigning an existing thread identifier obtained from the first message to the second message.

Abstract: According to an aspect, a method for ranking messages of conversation graphs in a messaging platform using machine-learning signals includes receiving a conversation view request to retrieve messages of a conversation graph stored on a messaging platform and determining a plurality of predictive outcomes for each of a plurality of messages of the conversation graph using predictive models. The determining step may include obtaining a plurality of signals relevant to the predictive models, the plurality of signals including data structure-related signals relating to the conversation graph and inputting the plurality of signals to the predictive models. The method includes ranking the plurality of messages based on the predictive outcomes and transmitting at least a subset of the plurality of messages to be rendered on a client application according to the rank.

Abstract: Methods and systems for generating, identifying, and displaying message threads on a social messaging platform. One of the methods includes receiving a first and second messages posted to a social messaging platform by a user account; determining whether the second message is a reply to the first message posted by the user account; in response, determining if the first message is part of an existing message thread; in response to determining that the first message is not part of an existing thread, assigning a new thread identifier to both the first message and the second message, the thread identifier associating both messages with a new thread; in response to determining that the first message is part of an existing thread, assigning an existing thread identifier obtained from the first message to the second message.