tenseleyflow/rcal / 816267c

+authors = ["Matthew Forrester Wolffe"]

+description = "A responsive terminal calendar with local events, reminders, and Microsoft Graph sync"

+license = "GPL-3.0-only"

+repository = "https://github.com/tenseleyFlow/rcal"

+readme = "README.md"

+keywords = ["calendar", "tui", "terminal", "microsoft-graph"]

+categories = ["command-line-utilities", "date-and-time"]

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+

+If you develop a new program, and you want it to be of the greatest possible

+use to the public, the best way to achieve this is to make it free software

+which everyone can redistribute and change under these terms.

+

+To do so, attach the following notices to the program. It is safest to attach

+them to the start of each source file to most effectively state the exclusion

+of warranty; and each file should have at least the "copyright" line and a

+pointer to where the full notice is found.

+

+    rcal

+    Copyright (C) 2026 Matthew Forrester Wolffe

+

+    This program is free software: you can redistribute it and/or modify it

+    under the terms of the GNU General Public License as published by the Free

+    Software Foundation, either version 3 of the License, or (at your option)

+    any later version.

+

+    This program is distributed in the hope that it will be useful, but WITHOUT

+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for

+    more details.

+

+    You should have received a copy of the GNU General Public License along

+    with this program. If not, see <https://www.gnu.org/licenses/>.

+

+Also add information on how to contact you by electronic and paper mail.

+

+If the program does terminal interaction, make it output a short notice like

+this when it starts in an interactive mode:

+

+    rcal Copyright (C) 2026 Matthew Forrester Wolffe

+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.

+    This is free software, and you are welcome to redistribute it under certain

+    conditions; type `show c' for details.

+

+The hypothetical commands `show w' and `show c' should show the appropriate

+parts of the General Public License. Of course, your program's commands might

+be different; for a GUI interface, you would use an "about box".

+

+You should also get your employer (if you work as a programmer) or school, if

+any, to sign a "copyright disclaimer" for the program, if necessary. For more

+information on this, and how to apply and follow the GNU GPL, see

+<https://www.gnu.org/licenses/>.

+

+The GNU General Public License does not permit incorporating your program into

+proprietary programs. If your program is a subroutine library, you may consider

+it more useful to permit linking proprietary applications with the library. If

+this is what you want to do, use the GNU Lesser General Public License instead

+of this License. But first, please read <https://www.gnu.org/licenses/why-not-lgpl.html>.

+For the current development release, users provide their own Microsoft Entra

+app registration `client_id` in `config.toml`. A future production release can

+ship an rcal-owned public/native client ID so end users do not need to create an

+Azure app. No client secret is used or stored; rcal stores user tokens in the OS

+keychain.

+

+### Microsoft Account Setup

+

+Create a config file:

+

+```sh

+rcal config init

+```

+

+Register a temporary local test app in the Microsoft Entra admin center:

+

+- Name: `rcal local test` or similar.

+- Supported account type:

+  - Personal Outlook/Hotmail/Live accounts: **Personal Microsoft accounts

+    only**.

+  - Work or school Microsoft 365 accounts: **Accounts in any organizational

+    directory**.

+- Redirect URI: platform **Mobile and desktop applications**, value

+  `http://localhost:8765/callback`.

+- API permissions: Microsoft Graph delegated `User.Read` and

+  `Calendars.ReadWrite`.

+- If Azure refuses the account type change with

+  `api.requestedAccessTokenVersion`, set the app manifest's

+  `requestedAccessTokenVersion` or `accessTokenAcceptedVersion` to `2`.

+

+Then edit `~/.config/rcal/config.toml`:

+

+```toml

+[providers]

+create_target = "microsoft" # or "local" to keep new events local-only

+

+[providers.microsoft]

+enabled = true

+default_account = "work"

+default_calendar = "CALENDAR_ID"

+sync_past_days = 30

+sync_future_days = 365

+

+[[providers.microsoft.accounts]]

+id = "work"

+client_id = "AZURE_APP_CLIENT_ID"

+tenant = "consumers"      # personal accounts

+# tenant = "organizations" # work/school accounts

+redirect_port = 8765

+calendars = ["CALENDAR_ID"]

+```

+

+Authenticate, list calendars, then copy the editable calendar ID into both

+`default_calendar` and `calendars`:

+

+```sh

+rcal providers microsoft auth login --account work --browser

+rcal providers microsoft calendars list --account work

+rcal providers microsoft sync --account work

+rcal

+```

+

+Use `rcal providers microsoft auth inspect --account work` to inspect safe

+token claims such as audience, scopes, tenant, and expiry. The command does not

+print the token body.

+

+The provider syncs configured calendars through Graph `calendarView`, caches

+selected events separately from the local events JSON, and routes

+create/edit/delete/copy operations for Microsoft events back through Graph.

+Provider reminders fire from cached provider events after a sync; the reminder

+daemon does not sync remote calendars itself.

+                let _ = writeln!(stdout, "token_format={}", inspection.token_format);

+# Current development builds require your own Microsoft Entra app client_id.

+# Use tenant = "consumers" for personal Outlook/Hotmail accounts and

+# tenant = "organizations" for work or school Microsoft 365 accounts.

+    pub token_format: String,

+    let claims_ref = claims.as_ref();

+        token_format: if claims_ref.is_some() {

+            "jwt"

+        } else {

+            "opaque"

+        }

+        .to_string(),

+        jwt_expires_at_epoch_seconds: claims_ref.and_then(|claims| graph_i64(claims, "exp")),

+        audience: claims_ref.and_then(|claims| graph_string(claims, "aud")),

+        scopes: claims_ref.and_then(|claims| graph_string(claims, "scp")),

+        roles: claims_ref

+            .and_then(|claims| claims.get("roles"))

+        tenant_id: claims_ref.and_then(|claims| graph_string(claims, "tid")),

+        issuer: claims_ref.and_then(|claims| graph_string(claims, "iss")),

+        app_id: claims_ref.and_then(|claims| graph_string(claims, "appid")),

+        authorized_party: claims_ref.and_then(|claims| graph_string(claims, "azp")),

+    if let Some(error) = params.get("error") {

+        let description = params

+            .get("error_description")

+            .map(String::as_str)

+            .unwrap_or("Microsoft did not provide an error description");

+        let message = format!("{error}: {description}");

+        let _ = write_oauth_callback_response(&mut stream, false, &message);

+        return Err(ProviderError::Auth(message));

+    }

+    let code = params.get("code").ok_or_else(|| {

+        let message = "OAuth callback did not include code".to_string();

+        let _ = write_oauth_callback_response(&mut stream, false, &message);

+        ProviderError::Auth(message)

+    })?;

+        let message = "OAuth callback state mismatch".to_string();

+        let _ = write_oauth_callback_response(&mut stream, false, &message);

+        return Err(ProviderError::Auth(message));

+    }

+    let _ = write_oauth_callback_response(

+        &mut stream,

+        true,

+        "rcal Microsoft login complete. You can close this tab.",

+    );

+fn access_token_claims(access_token: &str) -> Result<Option<Value>, ProviderError> {

+    let Some(payload) = access_token.split('.').nth(1) else {

+        return Ok(None);

+    };

+    serde_json::from_slice(&bytes)

+        .map_err(|err| {

+            ProviderError::Auth(format!("stored Microsoft access token is invalid: {err}"))

+        })

+        .map(Some)

+fn write_oauth_callback_response(

+    stream: &mut impl Write,

+    success: bool,

+    message: &str,

+) -> io::Result<()> {

+    let status = if success { "200 OK" } else { "400 Bad Request" };

+    let heading = if success {

+        "rcal Microsoft login complete"

+    } else {

+        "rcal Microsoft login failed"

+    };

+    let body = format!("{heading}\n\n{message}\n");

+    write!(

+        stream,

+        "HTTP/1.1 {status}\r\nContent-Type: text/plain; charset=utf-8\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}",

+        body.len(),

+        body

+    )

+}

+

+        assert_eq!(inspection.token_format, "jwt");

+    #[test]

+    fn inspect_token_tolerates_opaque_access_tokens() {

+        let store = MemoryTokenStore::default();

+        store.tokens.borrow_mut().insert(

+            "work".to_string(),

+            MicrosoftToken {

+                access_token: "opaque-consumer-token".to_string(),

+                refresh_token: "refresh".to_string(),

+                expires_at_epoch_seconds: 1_777_000_100,

+            },

+        );

+

+        let inspection = inspect_token("work", &store).expect("opaque token inspects");

+

+        assert_eq!(inspection.token_format, "opaque");

+        assert_eq!(inspection.audience, None);

+        assert_eq!(inspection.scopes, None);

+        assert_eq!(inspection.jwt_expires_at_epoch_seconds, None);

+        assert!(inspection.has_refresh_token);

+    }

+

+    #[test]

+    fn oauth_callback_response_surfaces_browser_errors() {

+        let mut response = Vec::new();

+

+        write_oauth_callback_response(

+            &mut response,

+            false,

+            "invalid_request: the application must use consumers",

+        )

+        .expect("response writes");

+

+        let response = String::from_utf8(response).expect("utf8 response");

+        assert!(response.starts_with("HTTP/1.1 400 Bad Request"));

+        assert!(response.contains("rcal Microsoft login failed"));

+        assert!(response.contains("invalid_request"));

+    }

+