Zig

Find a Label ID by Name

See more GMail REST API Examples

Lookup the ID of a GMail label by the label name. 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.

    const http = try chilkat.Http.init();
    defer http.deinit();
    http.setAuthToken("GMAIL-ACCESS-TOKEN");

    const user_id = "me";
    http.setUrlVar("userId", user_id) catch {};

    const url = "https://www.googleapis.com/gmail/v1/users/{$userId}/labels";

    // Get the list of GMail labels as JSON.
    const sb = try chilkat.StringBuilder.init();
    defer sb.deinit();
    http.quickGetSb(url, sb) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.loadSb(sb) catch {};
    json.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    if (http.getLastStatus() != 200) {
        std.debug.print("Failed.\n", .{});
        return;
    }

    // The JSON returned looks like this:
    // {
    //   "labels": [
    //     {
    //       "id": "Label_5",
    //       "name": "QA",
    //       "messageListVisibility": "show",
    //       "labelListVisibility": "labelShow",
    //       "type": "user"
    //     },
    //     {
    //       "id": "Label_21",
    //       "name": "[Gmail]/testFolder",
    //       "type": "user"
    //     },
    //     {
    //       "id": "CATEGORY_PERSONAL",
    //       "name": "CATEGORY_PERSONAL",
    //       "type": "system"
    //     },
    //     ...

    // The name of the label is generally known because it's what we visually see.
    // The id is what we need to get.  Assuming the name is unique,
    // find the JSON record having name=<desired name>
    // For example...
    var j_record: chilkat.JsonObject = try json.findRecord("labels", "name", "QA", false);
    defer j_record.deinit();
    if (json.getLastMethodSuccess()) {
        std.debug.print("The id of QA is: {s}\n", .{try j_record.stringOf(alloc, "id")});
    }

    {
        const next = try json.findRecord("labels", "name", "[Gmail]/testFolder", false);
        j_record.deinit();
        j_record = next;
    }
    if (json.getLastMethodSuccess()) {
        std.debug.print("The id of [Gmail]/testFolder is: {s}\n", .{try j_record.stringOf(alloc, "id")});
    }

    {
        const next = try json.findRecord("labels", "name", "questions", false);
        j_record.deinit();
        j_record = next;
    }
    if (json.getLastMethodSuccess()) {
        std.debug.print("The id of questions is: {s}\n", .{try j_record.stringOf(alloc, "id")});
    }

    // Output:

    // The id of QA is: Label_5
    // The id of [Gmail]/testFolder is: Label_21
    // The id of questions is: Label_43
}