Search-results interfaces for content-item-specific modules on online social networks

1. A method comprising, by one or more computing devices:

receiving, from a client system of a first user of an online social network, a request associated with a particular content item;

identifying, by one or more of the computing devices, one or more communications authored by one or more users of the online social network, each identified communication being associated with the particular content item;

identifying, for each of a plurality of potential search-results modules, a respective set of the identified communications;

determining, from the plurality of potential search-results modules, a set of search-results modules, wherein each search-results module in the determined set of search-results modules is determined based on the respective set of identified communications being greater than a module-specific threshold number of communications;

generating, by one or more of the computing devices, the determined set of search-results modules, each search-results module in the determined set of search-results modules being of a particular module type, wherein each search-results module comprises information from its respective set of the identified communications, wherein the information is of a type corresponding to the particular module type of the search-results module; and

sending, to the client system, a search-results interface comprising the determined set of search-results modules.

2. The method of claim 1 , further comprising:

accessing a social graph comprising a plurality of nodes and a plurality of edges connecting the nodes, each of the edges between two of the nodes representing a single degree of separation between them, the nodes comprising:

a first node corresponding to the first user; and

a plurality of second nodes corresponding to a plurality of communications of the online social network.

3. The method of claim 1 , wherein identifying the one or more communications associated with the particular content item further comprises accessing a communication index, wherein the communication index indexes a plurality of content items and, for each content item, one or more communications associated with the content item.

4. The method of claim 1 , wherein the request comprises a selection of an interactive element on an interface of the online social network, wherein the interactive element is generated for the particular content if, for at least one search-results module, a number of identified communications corresponding to a particular module type of the search-results module is greater than a module-specific threshold number of communications for the search-results module.

5. The method of claim 1 , wherein the request comprises a search query including one or more n-grams associated with the particular content item.

6. The method of claim 1 , wherein a communication is associated with a content item if it includes a link to an instance of the particular content item.

7. The method of claim 1 , wherein a communication is associated with a content item if it includes a threshold amount of text matching keywords associated with the content item.

8. The method of claim 1 , wherein the information of the one or more search-results modules is altered based on a user selection made by the first user.

9. The method of claim 1 , wherein the order in which the one or more modules are displayed is determined in part by calculating a module-score for each of the one or more modules.

10. The method of claim 9 , wherein the module-score is based on information in a user-preference file associated with the first user.

11. The method of claim 9 , wherein the module-score is based on a level of engagement among users of the online social network.

12. The method of claim 9 , wherein the module-score is based on a history of a level of engagement by the first user.

13. The method of claim 9 , wherein the module-score is based on the particular content item.

14. The method of claim 9 , wherein the module-score is based on demographic information of the first user.

15. The method of claim 1 , wherein the module-specific threshold number varies based on the module type of the search-results module.

16. The method of claim 1 , further comprising:

receiving a search query corresponding to one or more particular sentiments;

accessing a communication index, wherein the communication index indexes, for each communication, one or more sentiments associated with the communication;

identifying one or more responsive communications from the communication index, wherein one or more sentiments associated with the responsive communications matches the one or more particular sentiments corresponding to the search query; and

sending one or more updated search-results modules with information from the responsive communications.

17. The method of claim 1 , wherein the one or more communications comprises posts, reshares, comments, or messages.

18. The method of claim 1 , further comprising generating a popular-links module, wherein the popular-links module comprises one or more references to one or more other content items, respectively, each other content item having greater than a threshold number of associated communications.

19. One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

receive, from a client system of a first user of an online social network, a request associated with a particular content item;

identify one or more communications authored by one or more users of the online social network, each identified communication being associated with the particular content item;

identify, for each of a plurality of potential search-results modules, a respective set of the identified communications;

determine, from the plurality of potential search-results modules, a set of search-results modules, wherein each search-results module in the determined set of search-results modules is determined based on the respective set of identified communications being greater than a module-specific threshold number of communications;

generate the determined set of search-results modules, each search-results module in the determined set of search-results modules being of a particular module type, wherein each search-results module comprises information from its respective set of the identified communications, wherein the information is of a type corresponding to the particular module type of the search-results module; and

send, to the client system, a search-results interface comprising the determined set of search-results modules.

20. A system comprising: one or more processors; and a non-transitory memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to:

receive, from a client system of a first user of an online social network, a request associated with a particular content item;

identify one or more communications authored by one or more users of the online social network, each identified communication being associated with the particular content item;

identify, for each of a plurality of potential search-results modules, a respective set of the identified communications;

determine, from the plurality of potential search-results modules, a set of search-results modules, wherein each search-results module in the determined set of search-results modules is determined based on the respective set of identified communications being greater than a module-specific threshold number of communications;

generate the determined set of search-results modules, each search-results module in the determined set of search-results modules being of a particular module type, wherein each search-results module comprises information from its respective set of the identified communications, wherein the information is of a type corresponding to the particular module type of the search-results module; and

send, to the client system, a search-results interface comprising the determined set of search-results modules.