Rust

BatchModify - Add a Label to each Message in Search Results

See more GMail REST API Examples

Searchs GMail for messages meeting a criteria and adds a label to each message found. Rust

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

let http = chilkat::Http::new();
http.set_auth_token("GMAIL-ACCESS-TOKEN");

let user_id = "me".to_string();
let _ = http.set_url_var("userId", &user_id);

let query = "subject:questions".to_string();
let _ = http.set_url_var("query", &query);

let mut url = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages?q={$query}".to_string();

let sb = chilkat::StringBuilder::new();
if http.quick_get_sb(&url, &sb).is_err() {
    println!("{}", http.last_error_text());
    return;
}

let json = chilkat::JsonObject::new();
let _ = json.load_sb(&sb);
json.set_emit_compact(false);
println!("{}", json.emit().unwrap_or_default());

if http.last_status() != 200 {
    println!("Failed.");
    return;
}

// If successful, the received JSON looks like this:
// {
//   "messages": [
//     {
//       "id": "166f583051d36144",
//       "threadId": "166f583051d36144"
//     },
//     {
//       "id": "166f5815e1f36144",
//       "threadId": "166f5815e1f36144"
//     },
// 	...
//     {
//       "id": "166f580639e36144",
//       "threadId": "166f580639e36144"
//     },
//     {
//       "id": "15dbc2e28ec789c6",
//       "threadId": "15dbc2e28ec789c6"
//     }
//   ],
//   "nextPageToken": "13434766102274844688",
//   "resultSizeEstimate": 103
// }
// 

// Next, we'll be sending an HTTP POST to add the label "questions" to each message in the
// search results.  The JSON to be sent for the batchModify is this:

// 	{
// 	  "ids": [
// 	    string
// 	  ],
// 	  "addLabelIds": [
// 	    string
// 	  ],
// 	  "removeLabelIds": [
// 	    string
// 	  ]
// 	}

// We'll omit "removeLabelIds" because we're not removing any labels.
// We are parsing the JSON search results, and at the same time building the batchModify JSON.

let json2 = chilkat::JsonObject::new();

let mut i = 0;
let num_messages = json.size_of_array("messages");
while i < num_messages {
    json.set_i(i);
    let id = json.string_of("messages[i].id").unwrap_or_default();
    json2.set_i(i);
    let _ = json2.update_string("ids[i]", &id);
    i = i + 1;
}

// We need the id of the label (not the name).
// I know the name of the label is "questions", but I need to know the id.
// See this example: Get Label Id by Name
// The id of my label named "questions" is "Label_43"
let label_id = "Label_43".to_string();
let _ = json2.update_string("addLabelIds[0]", &label_id);
let _ = json2.update_new_array("removeLabelIds");

json2.set_emit_compact(false);
println!("{}", json2.emit().unwrap_or_default());

// Send the batchModify
url = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/batchModify".to_string();
let resp = chilkat::HttpResponse::new();
if http.http_json("POST", &url, &json2, "application/json", &resp).is_err() {
    println!("{}", http.last_error_text());
    return;
}

println!("status = {}", resp.status_code());

// A 204 response status indicate success.
if resp.status_code() != 204 {
    println!("{}", resp.body_str());
    println!("Failed.");
    return;
}

// The 204 response has an empty response body..

println!("BatchModify success!");