Zig Requires Chilkat v11.0.0+

Read a Single Facebook Post

See more Facebook Examples

Demonstrates how to read the contents of a single Facebook post. A post is an individual entry in a profile's feed. The profile could be a user, page, app, or group. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example assumes a previously obtained an access token
    const oauth2 = try chilkat.OAuth2.init();
    defer oauth2.deinit();
    oauth2.setAccessToken("FACEBOOK-ACCESS-TOKEN");

    const rest = try chilkat.Rest.init();
    defer rest.deinit();

    // Connect to Facebook...
    rest.connect("graph.facebook.com", 443, true, true) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // Provide the authentication credentials (i.e. the access key)
    rest.setAuthOAuth2(oauth2) catch {};

    // This example assumes a post id was already retrieved.
    // For example, it could've been retrieved by reading the user's feed:
    // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    const post_id = "10224048320139890_10210156138515282";

    const sb_path = try chilkat.StringBuilder.init();
    defer sb_path.deinit();
    sb_path.append("/v2.7/") catch {};
    sb_path.append(post_id) catch {};

    // Select the fields we want.
    // This example will select almost all the possible fields.
    // See https://developers.facebook.com/docs/graph-api/reference/post/
    rest.addQueryParam("fields", "id,message,created_time,caption,description,from,link,name,object_id,picture,place,privacy,properties,shares,source,status_type,story,targeting,to,type,updated_time,with_tags") catch {};

    const response_json = rest.fullRequestNoBody(alloc, "GET", try sb_path.getAsString(alloc)) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.setEmitCompact(false);
    json.load(response_json) catch {};

    // Show the JSON in human-readable format.
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // A sample JSON response is shown here.
    // {
    //   "id": "12345678901234567_12345678900000004",
    //   "message": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
    //   "created_time": "2016-09-29T20:46:18+0000",
    //   "from": {
    //     "name": "John Doe",
    //     "id": "12345678901234567"
    //   },
    //   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026247451&set=a.1237223526054.2038240.1094202869&type=3",
    //   "object_id": "10210139026347451",
    //   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026647451_7830642117574407060_n.jpg?oh=a7f9ed10ce9cd81a82adeb541c60e2e2&oe=58ABB195",
    //   "privacy": {
    //     "allow": "",
    //     "deny": "",
    //     "description": "Public",
    //     "friends": "",
    //     "value": "EVERYONE"
    //   },
    //   "status_type": "added_photos",
    //   "type": "photo",
    //   "updated_time": "2016-09-29T20:46:18+0000"
    // }

    // This is the code to parse some fields in the JSON response.
    std.debug.print("type: {s}\n", .{try json.stringOf(alloc, "type")});
    std.debug.print("message: {s}\n", .{try json.stringOf(alloc, "message")});
    std.debug.print("id: {s}\n", .{try json.stringOf(alloc, "id")});
    std.debug.print("link: {s}\n", .{try json.stringOf(alloc, "link")});
    std.debug.print("privacy descripton: {s}\n", .{try json.stringOf(alloc, "privacy.description")});

    const dtime = try chilkat.DateTime.init();
    defer dtime.deinit();
    const b_local_time = true;
    dtime.setFromTimestamp(try json.stringOf(alloc, "created_time")) catch {};
    const dt = try chilkat.DtObj.init();
    defer dt.deinit();
    dtime.toDtObj(b_local_time, dt);

    std.debug.print("{d}/{d}/{d}  {d}:{d}\n", .{ dt.getMonth(), dt.getDay(), dt.getYear(), dt.getHour(), dt.getMinute() });
}