forge_core/workflow/
context.rs

1use std::collections::HashMap;
2use std::future::Future;
3use std::pin::Pin;
4use std::sync::{Arc, RwLock};
5use std::time::Duration;
6
7use chrono::{DateTime, Utc};
8use serde::de::DeserializeOwned;
9use tokio::sync::mpsc;
10use uuid::Uuid;
11
12use super::parallel::ParallelBuilder;
13use super::step::StepStatus;
14use super::suspend::{SuspendReason, WorkflowEvent};
15use crate::env::{EnvAccess, EnvProvider, RealEnvProvider};
16use crate::function::AuthContext;
17use crate::{ForgeError, Result};
18
19/// Type alias for compensation handler function.
20pub type CompensationHandler = Arc<
21    dyn Fn(serde_json::Value) -> Pin<Box<dyn Future<Output = Result<()>> + Send>> + Send + Sync,
22>;
23
24/// Step state stored during execution.
25#[derive(Debug, Clone)]
26pub struct StepState {
27    /// Step name.
28    pub name: String,
29    /// Step status.
30    pub status: StepStatus,
31    /// Serialized result (if completed).
32    pub result: Option<serde_json::Value>,
33    /// Error message (if failed).
34    pub error: Option<String>,
35    /// When the step started.
36    pub started_at: Option<DateTime<Utc>>,
37    /// When the step completed.
38    pub completed_at: Option<DateTime<Utc>>,
39}
40
41impl StepState {
42    /// Create a new pending step state.
43    pub fn new(name: impl Into<String>) -> Self {
44        Self {
45            name: name.into(),
46            status: StepStatus::Pending,
47            result: None,
48            error: None,
49            started_at: None,
50            completed_at: None,
51        }
52    }
53
54    /// Mark step as running.
55    pub fn start(&mut self) {
56        self.status = StepStatus::Running;
57        self.started_at = Some(Utc::now());
58    }
59
60    /// Mark step as completed with result.
61    pub fn complete(&mut self, result: serde_json::Value) {
62        self.status = StepStatus::Completed;
63        self.result = Some(result);
64        self.completed_at = Some(Utc::now());
65    }
66
67    /// Mark step as failed with error.
68    pub fn fail(&mut self, error: impl Into<String>) {
69        self.status = StepStatus::Failed;
70        self.error = Some(error.into());
71        self.completed_at = Some(Utc::now());
72    }
73
74    /// Mark step as compensated.
75    pub fn compensate(&mut self) {
76        self.status = StepStatus::Compensated;
77    }
78}
79
80/// Context available to workflow handlers.
81pub struct WorkflowContext {
82    /// Workflow run ID.
83    pub run_id: Uuid,
84    /// Workflow name.
85    pub workflow_name: String,
86    /// Workflow version.
87    pub version: u32,
88    /// When the workflow started.
89    pub started_at: DateTime<Utc>,
90    /// Deterministic workflow time (consistent across replays).
91    workflow_time: DateTime<Utc>,
92    /// Authentication context.
93    pub auth: AuthContext,
94    /// Database pool.
95    db_pool: sqlx::PgPool,
96    /// HTTP client.
97    http_client: reqwest::Client,
98    /// Step states (for resumption).
99    step_states: Arc<RwLock<HashMap<String, StepState>>>,
100    /// Completed steps in order (for compensation).
101    completed_steps: Arc<RwLock<Vec<String>>>,
102    /// Compensation handlers for completed steps.
103    compensation_handlers: Arc<RwLock<HashMap<String, CompensationHandler>>>,
104    /// Channel for signaling suspension (sent by workflow, received by executor).
105    suspend_tx: Option<mpsc::Sender<SuspendReason>>,
106    /// Whether this is a resumed execution.
107    is_resumed: bool,
108    /// Whether this execution resumed specifically from a sleep (timer expired).
109    resumed_from_sleep: bool,
110    /// Tenant ID for multi-tenancy.
111    tenant_id: Option<Uuid>,
112    /// Environment variable provider.
113    env_provider: Arc<dyn EnvProvider>,
114}
115
116impl WorkflowContext {
117    /// Create a new workflow context.
118    pub fn new(
119        run_id: Uuid,
120        workflow_name: String,
121        version: u32,
122        db_pool: sqlx::PgPool,
123        http_client: reqwest::Client,
124    ) -> Self {
125        let now = Utc::now();
126        Self {
127            run_id,
128            workflow_name,
129            version,
130            started_at: now,
131            workflow_time: now,
132            auth: AuthContext::unauthenticated(),
133            db_pool,
134            http_client,
135            step_states: Arc::new(RwLock::new(HashMap::new())),
136            completed_steps: Arc::new(RwLock::new(Vec::new())),
137            compensation_handlers: Arc::new(RwLock::new(HashMap::new())),
138            suspend_tx: None,
139            is_resumed: false,
140            resumed_from_sleep: false,
141            tenant_id: None,
142            env_provider: Arc::new(RealEnvProvider::new()),
143        }
144    }
145
146    /// Create a resumed workflow context.
147    pub fn resumed(
148        run_id: Uuid,
149        workflow_name: String,
150        version: u32,
151        started_at: DateTime<Utc>,
152        db_pool: sqlx::PgPool,
153        http_client: reqwest::Client,
154    ) -> Self {
155        Self {
156            run_id,
157            workflow_name,
158            version,
159            started_at,
160            workflow_time: started_at,
161            auth: AuthContext::unauthenticated(),
162            db_pool,
163            http_client,
164            step_states: Arc::new(RwLock::new(HashMap::new())),
165            completed_steps: Arc::new(RwLock::new(Vec::new())),
166            compensation_handlers: Arc::new(RwLock::new(HashMap::new())),
167            suspend_tx: None,
168            is_resumed: true,
169            resumed_from_sleep: false,
170            tenant_id: None,
171            env_provider: Arc::new(RealEnvProvider::new()),
172        }
173    }
174
175    /// Set environment provider.
176    pub fn with_env_provider(mut self, provider: Arc<dyn EnvProvider>) -> Self {
177        self.env_provider = provider;
178        self
179    }
180
181    /// Mark that this context resumed from a sleep (timer expired).
182    pub fn with_resumed_from_sleep(mut self) -> Self {
183        self.resumed_from_sleep = true;
184        self
185    }
186
187    /// Set the suspend channel.
188    pub fn with_suspend_channel(mut self, tx: mpsc::Sender<SuspendReason>) -> Self {
189        self.suspend_tx = Some(tx);
190        self
191    }
192
193    /// Set the tenant ID.
194    pub fn with_tenant(mut self, tenant_id: Uuid) -> Self {
195        self.tenant_id = Some(tenant_id);
196        self
197    }
198
199    pub fn tenant_id(&self) -> Option<Uuid> {
200        self.tenant_id
201    }
202
203    pub fn is_resumed(&self) -> bool {
204        self.is_resumed
205    }
206
207    pub fn workflow_time(&self) -> DateTime<Utc> {
208        self.workflow_time
209    }
210
211    pub fn db(&self) -> crate::function::ForgeDb {
212        crate::function::ForgeDb::from_pool(&self.db_pool)
213    }
214
215    /// Acquire a connection compatible with sqlx compile-time checked macros.
216    pub async fn conn(&self) -> sqlx::Result<crate::function::ForgeConn<'static>> {
217        Ok(crate::function::ForgeConn::Pool(
218            self.db_pool.acquire().await?,
219        ))
220    }
221
222    pub fn http(&self) -> &reqwest::Client {
223        &self.http_client
224    }
225
226    /// Set authentication context.
227    pub fn with_auth(mut self, auth: AuthContext) -> Self {
228        self.auth = auth;
229        self
230    }
231
232    /// Restore step states from persisted data.
233    pub fn with_step_states(self, states: HashMap<String, StepState>) -> Self {
234        let completed: Vec<String> = states
235            .iter()
236            .filter(|(_, s)| s.status == StepStatus::Completed)
237            .map(|(name, _)| name.clone())
238            .collect();
239
240        *self.step_states.write().expect("workflow lock poisoned") = states;
241        *self
242            .completed_steps
243            .write()
244            .expect("workflow lock poisoned") = completed;
245        self
246    }
247
248    pub fn get_step_state(&self, name: &str) -> Option<StepState> {
249        self.step_states
250            .read()
251            .expect("workflow lock poisoned")
252            .get(name)
253            .cloned()
254    }
255
256    pub fn is_step_completed(&self, name: &str) -> bool {
257        self.step_states
258            .read()
259            .expect("workflow lock poisoned")
260            .get(name)
261            .map(|s| s.status == StepStatus::Completed)
262            .unwrap_or(false)
263    }
264
265    /// Check if a step has been started (running, completed, or failed).
266    ///
267    /// Use this to guard steps that should only execute once, even across
268    /// workflow suspension and resumption.
269    pub fn is_step_started(&self, name: &str) -> bool {
270        self.step_states
271            .read()
272            .expect("workflow lock poisoned")
273            .get(name)
274            .map(|s| s.status != StepStatus::Pending)
275            .unwrap_or(false)
276    }
277
278    pub fn get_step_result<T: serde::de::DeserializeOwned>(&self, name: &str) -> Option<T> {
279        self.step_states
280            .read()
281            .expect("workflow lock poisoned")
282            .get(name)
283            .and_then(|s| s.result.as_ref())
284            .and_then(|v| serde_json::from_value(v.clone()).ok())
285    }
286
287    /// Record step start.
288    ///
289    /// If the step is already running or beyond (completed/failed), this is a no-op.
290    /// This prevents race conditions when resuming workflows.
291    pub fn record_step_start(&self, name: &str) {
292        let mut states = self.step_states.write().expect("workflow lock poisoned");
293        let state = states
294            .entry(name.to_string())
295            .or_insert_with(|| StepState::new(name));
296
297        // Only update if step is pending - prevents race condition on resume
298        // where background DB update could overwrite a completed status
299        if state.status != StepStatus::Pending {
300            return;
301        }
302
303        state.start();
304        let state_clone = state.clone();
305        drop(states);
306
307        // Persist to database in background
308        let pool = self.db_pool.clone();
309        let run_id = self.run_id;
310        let step_name = name.to_string();
311        tokio::spawn(async move {
312            let step_id = Uuid::new_v4();
313            if let Err(e) = sqlx::query(
314                r#"
315                INSERT INTO forge_workflow_steps (id, workflow_run_id, step_name, status, started_at)
316                VALUES ($1, $2, $3, $4, $5)
317                ON CONFLICT (workflow_run_id, step_name) DO NOTHING
318                "#,
319            )
320            .bind(step_id)
321            .bind(run_id)
322            .bind(&step_name)
323            .bind(state_clone.status.as_str())
324            .bind(state_clone.started_at)
325            .execute(&pool)
326            .await
327            {
328                tracing::warn!(
329                    workflow_run_id = %run_id,
330                    step = %step_name,
331                    "Failed to persist step start: {}",
332                    e
333                );
334            }
335        });
336    }
337
338    /// Record step completion (fire-and-forget database update).
339    /// Use `record_step_complete_async` if you need to ensure persistence before continuing.
340    pub fn record_step_complete(&self, name: &str, result: serde_json::Value) {
341        let state_clone = self.update_step_state_complete(name, result);
342
343        // Persist to database in background
344        if let Some(state) = state_clone {
345            let pool = self.db_pool.clone();
346            let run_id = self.run_id;
347            let step_name = name.to_string();
348            tokio::spawn(async move {
349                Self::persist_step_complete(&pool, run_id, &step_name, &state).await;
350            });
351        }
352    }
353
354    /// Record step completion and wait for database persistence.
355    pub async fn record_step_complete_async(&self, name: &str, result: serde_json::Value) {
356        let state_clone = self.update_step_state_complete(name, result);
357
358        // Persist to database synchronously
359        if let Some(state) = state_clone {
360            Self::persist_step_complete(&self.db_pool, self.run_id, name, &state).await;
361        }
362    }
363
364    /// Update in-memory step state to completed.
365    fn update_step_state_complete(
366        &self,
367        name: &str,
368        result: serde_json::Value,
369    ) -> Option<StepState> {
370        let mut states = self.step_states.write().expect("workflow lock poisoned");
371        if let Some(state) = states.get_mut(name) {
372            state.complete(result.clone());
373        }
374        let state_clone = states.get(name).cloned();
375        drop(states);
376
377        let mut completed = self
378            .completed_steps
379            .write()
380            .expect("workflow lock poisoned");
381        if !completed.contains(&name.to_string()) {
382            completed.push(name.to_string());
383        }
384        drop(completed);
385
386        state_clone
387    }
388
389    /// Persist step completion to database.
390    async fn persist_step_complete(
391        pool: &sqlx::PgPool,
392        run_id: Uuid,
393        step_name: &str,
394        state: &StepState,
395    ) {
396        // Use UPSERT to handle race condition where persist_step_start hasn't completed yet
397        if let Err(e) = sqlx::query(
398            r#"
399            INSERT INTO forge_workflow_steps (id, workflow_run_id, step_name, status, result, started_at, completed_at)
400            VALUES (gen_random_uuid(), $1, $2, $3, $4, $5, $6)
401            ON CONFLICT (workflow_run_id, step_name) DO UPDATE
402            SET status = $3, result = $4, completed_at = $6
403            "#,
404        )
405        .bind(run_id)
406        .bind(step_name)
407        .bind(state.status.as_str())
408        .bind(&state.result)
409        .bind(state.started_at)
410        .bind(state.completed_at)
411        .execute(pool)
412        .await
413        {
414            tracing::warn!(
415                workflow_run_id = %run_id,
416                step = %step_name,
417                "Failed to persist step completion: {}",
418                e
419            );
420        }
421    }
422
423    /// Record step failure.
424    pub fn record_step_failure(&self, name: &str, error: impl Into<String>) {
425        let error_str = error.into();
426        let mut states = self.step_states.write().expect("workflow lock poisoned");
427        if let Some(state) = states.get_mut(name) {
428            state.fail(error_str.clone());
429        }
430        let state_clone = states.get(name).cloned();
431        drop(states);
432
433        // Persist to database in background
434        if let Some(state) = state_clone {
435            let pool = self.db_pool.clone();
436            let run_id = self.run_id;
437            let step_name = name.to_string();
438            tokio::spawn(async move {
439                if let Err(e) = sqlx::query(
440                    r#"
441                    UPDATE forge_workflow_steps
442                    SET status = $3, error = $4, completed_at = $5
443                    WHERE workflow_run_id = $1 AND step_name = $2
444                    "#,
445                )
446                .bind(run_id)
447                .bind(&step_name)
448                .bind(state.status.as_str())
449                .bind(&state.error)
450                .bind(state.completed_at)
451                .execute(&pool)
452                .await
453                {
454                    tracing::warn!(
455                        workflow_run_id = %run_id,
456                        step = %step_name,
457                        "Failed to persist step failure: {}",
458                        e
459                    );
460                }
461            });
462        }
463    }
464
465    /// Record step compensation.
466    pub fn record_step_compensated(&self, name: &str) {
467        let mut states = self.step_states.write().expect("workflow lock poisoned");
468        if let Some(state) = states.get_mut(name) {
469            state.compensate();
470        }
471        let state_clone = states.get(name).cloned();
472        drop(states);
473
474        // Persist to database in background
475        if let Some(state) = state_clone {
476            let pool = self.db_pool.clone();
477            let run_id = self.run_id;
478            let step_name = name.to_string();
479            tokio::spawn(async move {
480                if let Err(e) = sqlx::query(
481                    r#"
482                    UPDATE forge_workflow_steps
483                    SET status = $3
484                    WHERE workflow_run_id = $1 AND step_name = $2
485                    "#,
486                )
487                .bind(run_id)
488                .bind(&step_name)
489                .bind(state.status.as_str())
490                .execute(&pool)
491                .await
492                {
493                    tracing::warn!(
494                        workflow_run_id = %run_id,
495                        step = %step_name,
496                        "Failed to persist step compensation: {}",
497                        e
498                    );
499                }
500            });
501        }
502    }
503
504    pub fn completed_steps_reversed(&self) -> Vec<String> {
505        let completed = self.completed_steps.read().expect("workflow lock poisoned");
506        completed.iter().rev().cloned().collect()
507    }
508
509    pub fn all_step_states(&self) -> HashMap<String, StepState> {
510        self.step_states
511            .read()
512            .expect("workflow lock poisoned")
513            .clone()
514    }
515
516    pub fn elapsed(&self) -> chrono::Duration {
517        Utc::now() - self.started_at
518    }
519
520    /// Register a compensation handler for a step.
521    pub fn register_compensation(&self, step_name: &str, handler: CompensationHandler) {
522        let mut handlers = self
523            .compensation_handlers
524            .write()
525            .expect("workflow lock poisoned");
526        handlers.insert(step_name.to_string(), handler);
527    }
528
529    pub fn get_compensation_handler(&self, step_name: &str) -> Option<CompensationHandler> {
530        self.compensation_handlers
531            .read()
532            .expect("workflow lock poisoned")
533            .get(step_name)
534            .cloned()
535    }
536
537    pub fn has_compensation(&self, step_name: &str) -> bool {
538        self.compensation_handlers
539            .read()
540            .expect("workflow lock poisoned")
541            .contains_key(step_name)
542    }
543
544    /// Run compensation for all completed steps in reverse order.
545    /// Returns a list of (step_name, success) tuples.
546    pub async fn run_compensation(&self) -> Vec<(String, bool)> {
547        let steps = self.completed_steps_reversed();
548        let mut results = Vec::new();
549
550        for step_name in steps {
551            let handler = self.get_compensation_handler(&step_name);
552            let result = self
553                .get_step_state(&step_name)
554                .and_then(|s| s.result.clone());
555
556            if let Some(handler) = handler {
557                let step_result = result.unwrap_or(serde_json::Value::Null);
558                match handler(step_result).await {
559                    Ok(()) => {
560                        self.record_step_compensated(&step_name);
561                        results.push((step_name, true));
562                    }
563                    Err(e) => {
564                        tracing::error!(step = %step_name, error = %e, "Compensation failed");
565                        results.push((step_name, false));
566                    }
567                }
568            } else {
569                // No compensation handler, mark as compensated anyway
570                self.record_step_compensated(&step_name);
571                results.push((step_name, true));
572            }
573        }
574
575        results
576    }
577
578    pub fn compensation_handlers(&self) -> HashMap<String, CompensationHandler> {
579        self.compensation_handlers
580            .read()
581            .expect("workflow lock poisoned")
582            .clone()
583    }
584
585    /// Sleep for a duration.
586    ///
587    /// This suspends the workflow and persists the wake time to the database.
588    /// The workflow scheduler will resume the workflow when the time arrives.
589    ///
590    /// # Example
591    /// ```ignore
592    /// // Sleep for 30 days
593    /// ctx.sleep(Duration::from_secs(30 * 24 * 60 * 60)).await?;
594    /// ```
595    pub async fn sleep(&self, duration: Duration) -> Result<()> {
596        // If we resumed from a sleep, the timer already expired - continue immediately
597        if self.resumed_from_sleep {
598            return Ok(());
599        }
600
601        let wake_at = Utc::now() + chrono::Duration::from_std(duration).unwrap_or_default();
602        self.sleep_until(wake_at).await
603    }
604
605    /// Sleep until a specific time.
606    ///
607    /// If the wake time has already passed, returns immediately.
608    ///
609    /// # Example
610    /// ```ignore
611    /// use chrono::{Utc, Duration};
612    /// let renewal_date = Utc::now() + Duration::days(30);
613    /// ctx.sleep_until(renewal_date).await?;
614    /// ```
615    pub async fn sleep_until(&self, wake_at: DateTime<Utc>) -> Result<()> {
616        // If we resumed from a sleep, the timer already expired - continue immediately
617        if self.resumed_from_sleep {
618            return Ok(());
619        }
620
621        // If wake time already passed, return immediately
622        if wake_at <= Utc::now() {
623            return Ok(());
624        }
625
626        // Persist the wake time to database
627        self.set_wake_at(wake_at).await?;
628
629        // Signal suspension to executor
630        self.signal_suspend(SuspendReason::Sleep { wake_at })
631            .await?;
632
633        Ok(())
634    }
635
636    /// Wait for an external event with optional timeout.
637    ///
638    /// The workflow suspends until the event arrives or the timeout expires.
639    /// Events are correlated by the workflow run ID.
640    ///
641    /// # Example
642    /// ```ignore
643    /// let payment: PaymentConfirmation = ctx.wait_for_event(
644    ///     "payment_confirmed",
645    ///     Some(Duration::from_secs(7 * 24 * 60 * 60)), // 7 days
646    /// ).await?;
647    /// ```
648    pub async fn wait_for_event<T: DeserializeOwned>(
649        &self,
650        event_name: &str,
651        timeout: Option<Duration>,
652    ) -> Result<T> {
653        let correlation_id = self.run_id.to_string();
654
655        // Check if event already exists (race condition handling)
656        if let Some(event) = self.try_consume_event(event_name, &correlation_id).await? {
657            return serde_json::from_value(event.payload.unwrap_or_default())
658                .map_err(|e| ForgeError::Deserialization(e.to_string()));
659        }
660
661        // Calculate timeout
662        let timeout_at =
663            timeout.map(|d| Utc::now() + chrono::Duration::from_std(d).unwrap_or_default());
664
665        // Persist waiting state
666        self.set_waiting_for_event(event_name, timeout_at).await?;
667
668        // Signal suspension
669        self.signal_suspend(SuspendReason::WaitingEvent {
670            event_name: event_name.to_string(),
671            timeout: timeout_at,
672        })
673        .await?;
674
675        // After resume, try to consume the event
676        self.try_consume_event(event_name, &correlation_id)
677            .await?
678            .and_then(|e| e.payload)
679            .and_then(|p| serde_json::from_value(p).ok())
680            .ok_or_else(|| ForgeError::Timeout(format!("Event '{}' timed out", event_name)))
681    }
682
683    /// Try to consume an event from the database.
684    #[allow(clippy::type_complexity)]
685    async fn try_consume_event(
686        &self,
687        event_name: &str,
688        correlation_id: &str,
689    ) -> Result<Option<WorkflowEvent>> {
690        let result: Option<(
691            Uuid,
692            String,
693            String,
694            Option<serde_json::Value>,
695            DateTime<Utc>,
696        )> = sqlx::query_as(
697            r#"
698                UPDATE forge_workflow_events
699                SET consumed_at = NOW(), consumed_by = $3
700                WHERE id = (
701                    SELECT id FROM forge_workflow_events
702                    WHERE event_name = $1 AND correlation_id = $2 AND consumed_at IS NULL
703                    ORDER BY created_at ASC LIMIT 1
704                    FOR UPDATE SKIP LOCKED
705                )
706                RETURNING id, event_name, correlation_id, payload, created_at
707                "#,
708        )
709        .bind(event_name)
710        .bind(correlation_id)
711        .bind(self.run_id)
712        .fetch_optional(&self.db_pool)
713        .await
714        .map_err(|e| ForgeError::Database(e.to_string()))?;
715
716        Ok(result.map(
717            |(id, event_name, correlation_id, payload, created_at)| WorkflowEvent {
718                id,
719                event_name,
720                correlation_id,
721                payload,
722                created_at,
723            },
724        ))
725    }
726
727    /// Persist wake time to database.
728    async fn set_wake_at(&self, wake_at: DateTime<Utc>) -> Result<()> {
729        sqlx::query(
730            r#"
731            UPDATE forge_workflow_runs
732            SET status = 'waiting', suspended_at = NOW(), wake_at = $2
733            WHERE id = $1
734            "#,
735        )
736        .bind(self.run_id)
737        .bind(wake_at)
738        .execute(&self.db_pool)
739        .await
740        .map_err(|e| ForgeError::Database(e.to_string()))?;
741        Ok(())
742    }
743
744    /// Persist waiting for event state to database.
745    async fn set_waiting_for_event(
746        &self,
747        event_name: &str,
748        timeout_at: Option<DateTime<Utc>>,
749    ) -> Result<()> {
750        sqlx::query(
751            r#"
752            UPDATE forge_workflow_runs
753            SET status = 'waiting', suspended_at = NOW(), waiting_for_event = $2, event_timeout_at = $3
754            WHERE id = $1
755            "#,
756        )
757        .bind(self.run_id)
758        .bind(event_name)
759        .bind(timeout_at)
760        .execute(&self.db_pool)
761        .await
762        .map_err(|e| ForgeError::Database(e.to_string()))?;
763        Ok(())
764    }
765
766    /// Signal suspension to the executor.
767    async fn signal_suspend(&self, reason: SuspendReason) -> Result<()> {
768        if let Some(ref tx) = self.suspend_tx {
769            tx.send(reason)
770                .await
771                .map_err(|_| ForgeError::Internal("Failed to signal suspension".into()))?;
772        }
773        // Return a special error that the executor catches
774        Err(ForgeError::WorkflowSuspended)
775    }
776
777    /// Create a parallel builder for executing steps concurrently.
778    ///
779    /// # Example
780    /// ```ignore
781    /// let results = ctx.parallel()
782    ///     .step("fetch_user", || async { get_user(id).await })
783    ///     .step("fetch_orders", || async { get_orders(id).await })
784    ///     .step_with_compensate("charge_card",
785    ///         || async { charge_card(amount).await },
786    ///         |charge| async move { refund(charge.id).await })
787    ///     .run().await?;
788    ///
789    /// let user: User = results.get("fetch_user")?;
790    /// let orders: Vec<Order> = results.get("fetch_orders")?;
791    /// ```
792    pub fn parallel(&self) -> ParallelBuilder<'_> {
793        ParallelBuilder::new(self)
794    }
795
796    /// Create a step runner for executing a workflow step.
797    ///
798    /// This provides a fluent API for defining steps with retry, compensation,
799    /// timeout, and optional behavior.
800    ///
801    /// # Examples
802    ///
803    /// ```ignore
804    /// use std::time::Duration;
805    ///
806    /// // Simple step
807    /// let data = ctx.step("fetch_data", || async {
808    ///     Ok(fetch_from_api().await?)
809    /// }).run().await?;
810    ///
811    /// // Step with retry (3 attempts, 2 second delay)
812    /// ctx.step("send_email", || async {
813    ///     send_verification_email(&user.email).await
814    /// })
815    /// .retry(3, Duration::from_secs(2))
816    /// .run()
817    /// .await?;
818    ///
819    /// // Step with compensation (rollback on later failure)
820    /// let charge = ctx.step("charge_card", || async {
821    ///     charge_credit_card(&card).await
822    /// })
823    /// .compensate(|charge_result| async move {
824    ///     refund_charge(&charge_result.charge_id).await
825    /// })
826    /// .run()
827    /// .await?;
828    ///
829    /// // Optional step (failure won't trigger compensation)
830    /// ctx.step("notify_slack", || async {
831    ///     post_to_slack("User signed up!").await
832    /// })
833    /// .optional()
834    /// .run()
835    /// .await?;
836    ///
837    /// // Step with timeout
838    /// ctx.step("slow_operation", || async {
839    ///     process_large_file().await
840    /// })
841    /// .timeout(Duration::from_secs(60))
842    /// .run()
843    /// .await?;
844    /// ```
845    pub fn step<T, F, Fut>(&self, name: impl Into<String>, f: F) -> super::StepRunner<'_, T>
846    where
847        T: serde::Serialize + serde::de::DeserializeOwned + Clone + Send + Sync + 'static,
848        F: Fn() -> Fut + Send + Sync + 'static,
849        Fut: std::future::Future<Output = crate::Result<T>> + Send + 'static,
850    {
851        super::StepRunner::new(self, name, f)
852    }
853}
854
855impl EnvAccess for WorkflowContext {
856    fn env_provider(&self) -> &dyn EnvProvider {
857        self.env_provider.as_ref()
858    }
859}
860
861#[cfg(test)]
862#[allow(clippy::unwrap_used, clippy::indexing_slicing)]
863mod tests {
864    use super::*;
865
866    #[tokio::test]
867    async fn test_workflow_context_creation() {
868        let pool = sqlx::postgres::PgPoolOptions::new()
869            .max_connections(1)
870            .connect_lazy("postgres://localhost/nonexistent")
871            .expect("Failed to create mock pool");
872
873        let run_id = Uuid::new_v4();
874        let ctx = WorkflowContext::new(
875            run_id,
876            "test_workflow".to_string(),
877            1,
878            pool,
879            reqwest::Client::new(),
880        );
881
882        assert_eq!(ctx.run_id, run_id);
883        assert_eq!(ctx.workflow_name, "test_workflow");
884        assert_eq!(ctx.version, 1);
885    }
886
887    #[tokio::test]
888    async fn test_step_state_tracking() {
889        let pool = sqlx::postgres::PgPoolOptions::new()
890            .max_connections(1)
891            .connect_lazy("postgres://localhost/nonexistent")
892            .expect("Failed to create mock pool");
893
894        let ctx = WorkflowContext::new(
895            Uuid::new_v4(),
896            "test".to_string(),
897            1,
898            pool,
899            reqwest::Client::new(),
900        );
901
902        ctx.record_step_start("step1");
903        assert!(!ctx.is_step_completed("step1"));
904
905        ctx.record_step_complete("step1", serde_json::json!({"result": "ok"}));
906        assert!(ctx.is_step_completed("step1"));
907
908        let result: Option<serde_json::Value> = ctx.get_step_result("step1");
909        assert!(result.is_some());
910    }
911
912    #[test]
913    fn test_step_state_transitions() {
914        let mut state = StepState::new("test");
915        assert_eq!(state.status, StepStatus::Pending);
916
917        state.start();
918        assert_eq!(state.status, StepStatus::Running);
919        assert!(state.started_at.is_some());
920
921        state.complete(serde_json::json!({}));
922        assert_eq!(state.status, StepStatus::Completed);
923        assert!(state.completed_at.is_some());
924    }
925}
forge_core/workflow/context.rs

forge_core/workflow/
context.rs
