149 lines
5.7 KiB
Markdown
149 lines
5.7 KiB
Markdown
# DESIGN-0.35.0 — Workflow Product
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Transforms the workflow engine from a linear stage-runner into a
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product-grade automation tool. Seven changesets covering conditional
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routing, AI-triggered routing, data pipeline hooks, progressive forms,
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conditional fields, structured review, and a monitoring dashboard.
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Depends on: v0.34.0 (Data Portability), v0.31.2 (Team Workflows),
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v0.29.0 (Starlark Sandbox).
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## Schema Changes
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Migrations modified in-place (DB rebuild required):
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**005_channels.sql** — add `stage_entered_at` (PG: `TIMESTAMPTZ`,
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SQLite: `TEXT`). Tracks when the current stage was entered for SLA
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computation. Also add index `idx_channels_workflow_active` on
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`(workflow_id, workflow_status)` for monitoring queries.
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**018_workflows.sql** — add `sla_seconds INTEGER` to `workflow_stages`.
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Add `review_comments` (PG: `JSONB DEFAULT '[]'`, SQLite: `TEXT
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DEFAULT '[]'`) to `workflow_assignments`.
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No new migration files. No new tables.
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## Conditional Routing Engine
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**File:** `server/workflow/routing.go`
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The existing advance logic hardcoded `nextStage = currentStage + 1`.
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The routing engine replaces this with condition evaluation:
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1. Parse `transition_rules.conditions[]` from the departing stage
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2. Evaluate each condition against accumulated `stage_data`
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3. First match → resolve `target_stage` (by name or ordinal)
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4. No match → fallback to `ordinal + 1`
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**Expression format:** `{field, op, value, target_stage}`. Operators:
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`eq`, `neq`, `gt`, `lt`, `gte`, `lte`, `in`, `contains`, `exists`,
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`not_exists`. Loose equality via `fmt.Sprintf("%v")` comparison.
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Numeric comparison extracts `float64` from both sides.
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**Wiring:** `ResolveNextStage()` called in all 4 advance sites:
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handler (`workflow_instances.go`), tool (`tools/workflow.go`), forms
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auto-advance (`workflow_forms.go`), Starlark module
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(`sandbox/workflow_module.go`).
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**Backward compatible:** no conditions = `ordinal + 1`.
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## AI-Triggered Routing
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**Tool:** `workflow_route` — persona calls with `{target_stage, reason}`.
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Uses `ResolveStageByName()` (case-insensitive). Records decision in
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`stage_data._route_history_latest`. Allows forward and backward jumps
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(loop stages for iterative correction).
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**Starlark:** `workflow.route(channel_id, target_stage, reason)` for
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extension-driven escalation patterns. Requires `workflow.access`.
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## on_advance Hook
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**File:** `server/handlers/workflow_hooks.go`
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Fires synchronously after `AdvanceWorkflowStage` succeeds. Configured
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per-stage in `transition_rules.on_advance: {package_id, entry_point}`.
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Hook receives: `{stage_data, previous_stage, current_stage, channel_id}`.
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Returns: `{stage_data: {...}}` (enriched), `None` (no change), or
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`{error: "msg"}` (logged, not rolled back — future: rollback support).
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The existing `http` Starlark module (v0.29.1) is available in hooks,
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enabling external API enrichment without new infrastructure.
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## Progressive Forms
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**Model:** `TypedFormTemplate.Fieldsets []FormFieldset` — optional
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array of `{label, fields[]}`. When present, top-level `fields` is
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replaced by flattened fieldset fields in `ParseTypedFormTemplate()`.
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**Frontend:** `workflow.html` renders one fieldset at a time with
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step indicator, next/back navigation. All fields submitted together
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on the final step.
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## Conditional Fields
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**Model:** `FormField.Condition *FieldCondition` — `{when, op, value}`.
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Operators: `eq` (default), `neq`, `in`, `exists`.
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**Server-side:** `ValidateFormData()` calls `evaluateFieldCondition()`
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before each field. Hidden fields are skipped (no required check, no
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type validation).
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**Client-side:** `workflow.html` attaches `change`/`input` listeners
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to source fields. Target fields toggle `cond-hidden` CSS class.
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## Structured Review
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**Review comments:** `review_comments JSONB` on `workflow_assignments`.
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`POST /workflow-assignments/:id/comment` appends `{text, user_id,
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created_at}`. `GET /workflow-assignments/:id` returns full assignment.
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**Review surface:** Side-by-side layout in `workflow.html` — left panel
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shows structured `stage_data` table (internal `_`-prefixed keys hidden),
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right panel has comment textarea + approve/reject buttons. Keyboard
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shortcuts: `Ctrl+Enter` approve, `Ctrl+Shift+Enter` reject.
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## Monitoring Dashboard
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**File:** `server/handlers/workflow_monitor.go`
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**Endpoints:**
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- `GET /admin/workflows/monitor/instances` — all active instances
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- `GET /admin/workflows/monitor/funnel/:id` — stage counts
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- `GET /admin/workflows/monitor/stale?threshold_hours=N`
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- `GET /teams/:teamId/workflows/monitor/instances` — team-scoped
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**SLA computation:** `stage_entered_at + sla_seconds` vs `NOW()`.
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Returned as `sla_remaining_seconds` (negative = breached) and
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`sla_breached` boolean. Computed at query time, not stored.
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**Store:** New `ListByType(ctx, "workflow")` method on `ChannelStore`
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(both PG and SQLite). Monitoring queries iterate active channels,
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joining workflow definitions and stage metadata.
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**Frontend:** `src/js/workflow-monitor.js` — auto-refresh every 30s,
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SLA color indicators (green > 50%, yellow > 20%, red), stale instance
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alert section.
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## Workflow Branding
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`WorkflowPageData.BrandingJSON` passes the workflow's `branding` JSON
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to the visitor template. Applied as:
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- `--accent` CSS custom property (from `accent_color`)
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- Logo image in header (from `logo_url`)
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- Tagline text below header (from `tagline`)
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Previously branding was only on the landing page; now also on the
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active workflow surface.
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## New Files
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| File | Purpose |
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|------|---------|
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| `server/workflow/routing.go` | Conditional routing engine |
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| `server/handlers/workflow_hooks.go` | on_advance hook dispatch |
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| `server/handlers/workflow_monitor.go` | Monitoring dashboard |
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| `src/js/workflow-monitor.js` | Admin monitoring frontend |
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| `packages/icd-test-runner/js/crud/workflow-product.js` | E2E tests |
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