jmap-tasks-client 0.1.2

//! JMAP Tasks — TaskList/* method implementations on SessionClient.
//!
//! Each method follows the standard five-step pattern:
//!   1. Validate arguments (defence-in-depth empty-state guards).
//!   2. Call `self.session_parts()?` → `(api_url, account_id)`.
//!   3. Build args JSON with `serde_json::json!({…})`.
//!   4. Call `build_request(method_name, args, USING_TASKS)`.
//!   5. Call `self.call_internal(api_url, &req).await?`.
//!   6. Call `jmap_base_client::extract_response(&resp, CALL_ID)?`.

use std::collections::HashMap;

use jmap_types::{Id, PatchObject, State};

use super::{ChangesResponse, GetResponse, SetResponse};

impl super::SessionClient {
    /// Fetch TaskList objects by IDs (draft-tasks-06 §3.5).
    ///
    /// If `ids` is `None`, the server returns all TaskLists for the account,
    /// SUBJECT TO the server's `maxObjectsInGet` cap (RFC 8620 §5.1).
    /// For production use, scope the result set via the corresponding
    /// /query method first and pass explicit ids here to avoid
    /// `requestTooLarge` errors when the account holds more objects
    /// than the cap.
    /// Pass `properties: None` to return all fields.
    ///
    /// # Errors
    ///
    /// - [`ClientError::InvalidSession`](jmap_base_client::ClientError::InvalidSession)
    ///   if the bound session has no primary account for
    ///   `urn:ietf:params:jmap:tasks`.
    /// - Any transport / protocol variant returned by
    ///   [`JmapClient::call`](jmap_base_client::JmapClient::call):
    ///   [`Http`](jmap_base_client::ClientError::Http),
    ///   [`Parse`](jmap_base_client::ClientError::Parse),
    ///   [`AuthFailed`](jmap_base_client::ClientError::AuthFailed),
    ///   [`MethodError`](jmap_base_client::ClientError::MethodError)
    ///   (wraps RFC 8620 §3.6.2 method-level errors such as
    ///   `accountNotFound`, `invalidArguments`, `serverFail`),
    ///   [`MethodNotFound`](jmap_base_client::ClientError::MethodNotFound),
    ///   [`ResponseTooLarge`](jmap_base_client::ClientError::ResponseTooLarge),
    ///   or
    ///   [`UnexpectedResponse`](jmap_base_client::ClientError::UnexpectedResponse).
    pub async fn task_list_get(
        &self,
        ids: Option<&[Id]>,
        properties: Option<&[&str]>,
    ) -> Result<GetResponse<jmap_tasks_types::TaskList>, jmap_base_client::ClientError> {
        let (api_url, account_id) = self.session_parts()?;
        // Omit `ids` / `properties` entirely when None rather than sending
        // an explicit JSON null. RFC 8620 §5.1 accepts both shapes, but the
        // crate's other builders (set/changes/query) consistently use the
        // conditional-add idiom; matching it here keeps the wire request
        // canonical and avoids "present-but-null vs absent" interop quirks
        // in proxies / audit loggers.
        let mut args = serde_json::json!({ "accountId": account_id });
        if let Some(id_slice) = ids {
            args["ids"] = serde_json::to_value(id_slice).expect("Id slice Serialize is infallible");
        }
        if let Some(props) = properties {
            args["properties"] =
                serde_json::to_value(props).expect("&[&str] Serialize is infallible");
        }
        let req = super::build_request("TaskList/get", args, super::USING_TASKS);
        let resp = self.call_internal(api_url, &req).await?;
        jmap_base_client::extract_response(&resp, super::CALL_ID)
    }

    /// Fetch changes to TaskList objects since `since_state` (draft-tasks-06 §3.6).
    ///
    /// If `has_more_changes` is true in the response, call again with `new_state`
    /// as `since_state` until the flag is false.
    ///
    /// # Errors
    ///
    /// - [`ClientError::InvalidArgument`](jmap_base_client::ClientError::InvalidArgument)
    ///   if `since_state` is the empty string (defence-in-depth —
    ///   `State` constructed via [`State::from`](jmap_types::State::from)
    ///   accepts empty strings, but an empty `sinceState` is never
    ///   useful and would otherwise generate a wasted round-trip).
    /// - [`ClientError::InvalidSession`](jmap_base_client::ClientError::InvalidSession)
    ///   if the bound session has no primary account for
    ///   `urn:ietf:params:jmap:tasks`.
    /// - Any transport / protocol variant returned by
    ///   [`JmapClient::call`](jmap_base_client::JmapClient::call) — see
    ///   the matching error list on [`Self::task_list_get`].
    pub async fn task_list_changes(
        &self,
        since_state: &State,
        max_changes: Option<u64>,
    ) -> Result<ChangesResponse, jmap_base_client::ClientError> {
        // Defence-in-depth: even with the typed-`State` parameter (a transparent
        // newtype around `String`), an empty state token is still a logically
        // invalid value that should be caught client-side rather than producing
        // a confusing server-side `cannotCalculateChanges` error.
        if since_state.as_ref().is_empty() {
            return Err(jmap_base_client::ClientError::InvalidArgument(
                "task_list_changes: since_state may not be empty".into(),
            ));
        }
        let (api_url, account_id) = self.session_parts()?;
        let mut args = serde_json::json!({
            "accountId": account_id,
            "sinceState": since_state,
        });
        if let Some(mc) = max_changes {
            args["maxChanges"] = mc.into();
        }
        let req = super::build_request("TaskList/changes", args, super::USING_TASKS);
        let resp = self.call_internal(api_url, &req).await?;
        jmap_base_client::extract_response(&resp, super::CALL_ID)
    }

    /// Create, update, or destroy TaskList objects (draft-tasks-06 §3.7).
    ///
    /// Pass `create`, `update`, and/or `destroy` as needed. All three are
    /// optional; pass `None` to omit any operation from the request.
    ///
    /// `update` is `Option<HashMap<Id, PatchObject>>` (RFC 8620 §5.3). Wire
    /// format is unchanged from a plain JSON object because [`PatchObject`]
    /// is `#[serde(transparent)]`; the typed parameter binds the JSON Pointer
    /// key + null-leaf removal contract to the type system.
    ///
    /// `params` carries extra method-level arguments
    /// ([`TaskListSetParams`](super::TaskListSetParams)). Pass `None`
    /// (or `Some(Default::default())`) for spec-default behavior. Use
    /// [`TaskListSetParams::on_destroy_remove_tasks`](super::TaskListSetParams::on_destroy_remove_tasks)
    /// to allow destroying a non-empty TaskList (otherwise the server
    /// returns `taskListHasTasks`), and
    /// [`TaskListSetParams::extra`](super::TaskListSetParams::extra) for
    /// vendor / site extension fields (workspace extras-preservation
    /// policy).
    ///
    /// # Errors
    ///
    /// - [`ClientError::InvalidSession`](jmap_base_client::ClientError::InvalidSession)
    ///   if the bound session has no primary account for
    ///   `urn:ietf:params:jmap:tasks`.
    /// - [`ClientError::InvalidArgument`](jmap_base_client::ClientError::InvalidArgument)
    ///   if `update` is `Some` and `serde_json::to_value` fails on the
    ///   patch map (pathological conditions only; see [`Self::task_set`]
    ///   for the memory-cost discussion that applies identically here).
    /// - Any transport / protocol variant returned by
    ///   [`JmapClient::call`](jmap_base_client::JmapClient::call) — see
    ///   the matching error list on [`Self::task_list_get`].
    pub async fn task_list_set(
        &self,
        create: Option<serde_json::Value>,
        update: Option<HashMap<Id, PatchObject>>,
        destroy: Option<Vec<Id>>,
        params: Option<super::TaskListSetParams>,
    ) -> Result<SetResponse<jmap_tasks_types::TaskList>, jmap_base_client::ClientError> {
        if create.is_none() && update.is_none() && destroy.is_none() {
            return Err(jmap_base_client::ClientError::InvalidArgument(
                "task_list_set: at least one of create, update, destroy must be Some \
                 (an all-None /set is a no-op round-trip)"
                    .into(),
            ));
        }
        let (api_url, account_id) = self.session_parts()?;
        let mut args = serde_json::json!({
            "accountId": account_id,
        });
        let mut params_extra: Option<serde_json::Map<String, serde_json::Value>> = None;
        if let Some(p) = params {
            if let Some(v) = p.on_destroy_remove_tasks {
                args["onDestroyRemoveTasks"] = v.into();
            }
            if !p.extra.is_empty() {
                params_extra = Some(p.extra);
            }
        }
        if let Some(c) = create {
            args["create"] = c;
        }
        if let Some(u) = update {
            args["update"] = serde_json::to_value(&u).map_err(|e| {
                jmap_base_client::ClientError::InvalidArgument(format!(
                    "task_list_set: serializing update map failed: {e}"
                ))
            })?;
        }
        if let Some(d) = destroy {
            args["destroy"] = serde_json::to_value(&d).expect("Id Vec Serialize is infallible");
        }
        // Route caller-supplied vendor extras onto the wire (workspace
        // extras-preservation policy). Use `entry().or_insert()` so a
        // caller who put a typed wire key into `params.extra` cannot
        // silently clobber the typed value — typed wins on collision.
        if let Some(extra) = params_extra {
            let args_obj = args
                .as_object_mut()
                .expect("task_list_set: args is constructed as Object");
            for (k, v) in extra {
                args_obj.entry(k).or_insert(v);
            }
        }
        let req = super::build_request("TaskList/set", args, super::USING_TASKS);
        let resp = self.call_internal(api_url, &req).await?;
        jmap_base_client::extract_response(&resp, super::CALL_ID)
    }
}

// ---------------------------------------------------------------------------
// Tests — see tests/task_list_tests.rs (wiremock-backed end-to-end)
// ---------------------------------------------------------------------------
//
// `task_list_set_on_destroy_remove_tasks_in_args` was vacuous: it hand-built
// `args` Values and fed them to `build_request`, never exercising the
// production `task_list_set` builder. Deleted in JMAP-tco1.20.
//
// Real production-path coverage:
//   - task_list_get_sends_correct_wire_request
//   - task_list_changes_sends_since_state
//   - task_list_set_on_destroy_remove_tasks_round_trip
//   - task_list_set_without_on_destroy_omits_field
// in tests/task_list_tests.rs.
//
// Specific-flag passthrough coverage that may be lost is tracked
// under JMAP-uuoi for follow-up wiremock smoke tests.
//
// `build_request`, `CALL_ID`, and `USING_TASKS` themselves have their
// own focused tests in `methods/mod.rs`.
//
// The InvalidArgument guard for empty since_state lives in
// task_list_changes production code; testing it requires a wiremock-backed
// async harness. See JMAP-sc1b.64.
//
// The `task_list_get_empty_id_returns_invalid_argument` inline smoke test
// was removed by the JMAP-6by7.5 typed-Id refactor. It was vacuous because
// it only iterated a local `&[""]` slice and asserted `is_empty()` found
// the empty value, without invoking any production method. Under typed
// `&[Id]` parameters, an empty-Id input is impossible to express through
// the API (`Id::new_validated("")` returns `Err` at the call site) so the
// bug it pretended to test is unrepresentable.