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Firebase PATCH - Updating Data

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Uses the PATCH method to update record with new information. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

Zig

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

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

    // Uses the PATCH method to update a Firebase record.

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

    // This example assumes a JWT authentication token, if required, has been previously obtained.
    // See Get Firebase Access Token from JSON Service Account Private Key for sample code.

    // Load the previously obtained Firebase access token into a string.
    const fac = try chilkat.FileAccess.init();
    defer fac.deinit();
    const access_token = fac.readEntireTextFile(alloc, "qa_data/tokens/firebaseToken.txt", "utf-8") catch {
        std.debug.print("{s}\n", .{try fac.getLastErrorText(alloc)});
        return;
    };

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

    // Make the initial connection (without sending a request yet).
    // Once connected, any number of requests may be sent.  It is not necessary to explicitly
    // call Connect before each request.
    rest.connect("chilkat.firebaseio.com", 443, true, true) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    const auth_google = try chilkat.AuthGoogle.init();
    defer auth_google.deinit();
    auth_google.setAccessToken(access_token);
    rest.setAuthGoogle(auth_google) catch {};

    // Chilkat's sample data (pig-rescue data) is publicly readable at: https://chilkat.firebaseio.com/.json
    // This data is publicly readable, but not writable.  You'll need to
    // run against your own database..

    // We're going to update "Molly II" to "Molly III"
    const pig_name_update = try chilkat.JsonObject.init();
    defer pig_name_update.deinit();
    pig_name_update.appendString("name", "Molly III") catch {};

    // The string content of the last arg passed is  {"name":"Molly III"}
    const json_response = rest.fullRequestString(alloc, "PATCH", "/pig-rescue/animal/-KI3bD-FU_Dake7sYOiP.json", try pig_name_update.emit(alloc)) catch {
        // Something happened in the communications (either no request was sent, or no response was received.
        // (The Chilkat REST API also has lower-level methods where an app can send the request in one call,
        // and then receive the response in another call.)
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // Check the response status code.   A 200 response status indicates success.
    if (rest.getResponseStatusCode() != 200) {
        std.debug.print("{s}\n", .{try rest.getResponseStatusText(alloc)});
        std.debug.print("{s}\n", .{json_response});
        std.debug.print("Failed.\n", .{});
        return;
    }

    // When successful, the response contains the data written.
    std.debug.print("{s}\n", .{json_response});
    std.debug.print("Success.\n", .{});
}