484 lines
16 KiB
Swift
484 lines
16 KiB
Swift
import ByreAPI
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import SwiftUI
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typealias WorkflowDefinition = Components.Schemas.WorkflowDefinition
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typealias WorkflowStep = Components.Schemas.WorkflowStep
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typealias TeamMember = Components.Schemas.TeamMember
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@MainActor
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@Observable
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final class StepNode: Identifiable {
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enum Kind {
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case stage, order, parallel
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}
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let id = UUID()
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var kind: Kind
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var name = ""
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var model = ""
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var prompt = ""
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var agents: [TeamMember]?
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var children: [StepNode] = []
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weak var parent: StepNode?
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var open = false
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init(kind: Kind, children: [StepNode] = []) {
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self.kind = kind
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self.children = children
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for c in children {
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c.parent = self
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}
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}
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convenience init(_ step: WorkflowStep) {
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if let order = step.order {
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self.init(kind: .order, children: order.map { StepNode($0) })
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} else if let parallel = step.parallel {
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self.init(kind: .parallel, children: parallel.map { StepNode($0) })
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} else {
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self.init(kind: .stage)
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name = step.stage ?? ""
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model = step.model ?? ""
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prompt = step.prompt ?? ""
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agents = step.agents
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}
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}
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var step: WorkflowStep {
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switch kind {
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case .stage:
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WorkflowStep(stage: name, model: agents == nil ? model : nil, prompt: prompt, agents: agents)
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case .order:
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WorkflowStep(order: children.map(\.step))
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case .parallel:
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WorkflowStep(parallel: children.map(\.step))
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}
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}
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var index: Int {
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parent!.children.firstIndex { $0 === self }!
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}
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func contains(_ other: StepNode) -> Bool {
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other === self || children.contains { $0.contains(other) }
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}
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func stageNames() -> [String] {
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kind == .stage ? [name] : children.flatMap { $0.stageNames() }
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}
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func insert(_ node: StepNode, at i: Int) {
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node.parent = self
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children.insert(node, at: i)
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}
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func detach() {
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parent?.children.remove(at: index)
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parent = nil
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}
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}
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@MainActor
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private func newStage(_ root: StepNode, _ model: String) -> StepNode {
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let names = Set(root.stageNames())
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var n = names.count + 1
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while names.contains("Stage \(n)") {
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n += 1
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}
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let s = StepNode(kind: .stage)
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s.name = "Stage \(n)"
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s.model = model
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s.open = true
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return s
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}
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@MainActor
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private func stepGraph(_ root: StepNode) -> Flowchart {
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var chart = Flowchart(direction: .td)
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func walk(_ node: StepNode, _ before: [String]) -> [String] {
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switch node.kind {
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case .order:
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return node.children.reduce(before) { walk($1, $0) }
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case .parallel:
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return node.children.flatMap { walk($0, before) }
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case .stage:
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let id = "n\(chart.order.count)"
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chart.node(id, label: node.name.isEmpty ? " " : node.name, shape: .box)
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for b in before {
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chart.edges.append(FlowEdge(from: b, to: id, label: nil, style: .solid, arrow: true))
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}
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return [id]
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}
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}
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_ = walk(root, [])
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return chart
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}
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private struct StepLine: Identifiable {
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let node: StepNode
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let guide: String
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var id: UUID { node.id }
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}
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@MainActor
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private func stepLines(_ node: StepNode, _ lead: String) -> [StepLine] {
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var out: [StepLine] = []
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for (i, c) in node.children.enumerated() {
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let last = i == node.children.count - 1
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out.append(StepLine(node: c, guide: lead + (last ? "└─ " : "├─ ")))
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out += stepLines(c, lead + (last ? " " : "│ "))
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}
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return out
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}
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struct WorkflowEditor: View {
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let original: String?
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let close: () -> Void
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@Environment(Store.self) private var store
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@Environment(Overlays.self) private var overlays
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@ViewState private var root: StepNode?
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@ViewState private var loaded: WorkflowDefinition?
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@ViewState private var name = ""
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@ViewState private var description = ""
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@ViewState private var failure = ""
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@ViewState private var saving = false
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var body: some View {
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ScrollView {
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VStack(alignment: .leading, spacing: 0) {
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HStack(spacing: 10) {
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Button("‹ workflows") {
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Task {
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await leave()
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}
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}
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.buttonStyle(SmallLinkButtonStyle())
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Spacer()
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Button("save") {
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Task {
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await save()
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}
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}
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.buttonStyle(WebButtonStyle(primary: true))
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.disabled(saving || !changed || target.isEmpty)
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}
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.padding(.top, 16)
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if let root {
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TextField("Name", text: $name)
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.modifier(FieldStyle())
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.padding(.top, 12)
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TextField("Description", text: $description, axis: .vertical)
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.modifier(FieldStyle())
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.padding(.top, 8)
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if !root.stageNames().isEmpty {
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FlowchartCanvas(layout: layoutFlowchart(stepGraph(root)))
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.frame(maxWidth: .infinity, alignment: .leading)
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.padding(.top, 12)
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}
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if !failure.isEmpty {
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Text(failure)
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.foregroundStyle(Palette.danger)
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.textSelection(.enabled)
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.fixedSize(horizontal: false, vertical: true)
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.padding(.top, 8)
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}
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VStack(alignment: .leading, spacing: 0) {
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ForEach(stepLines(root, "")) { row in
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StepRow(node: row.node, guide: row.guide, root: root)
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}
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}
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.padding(.top, 12)
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Button("add stage") {
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root.insert(newStage(root, store.defaultModel), at: root.children.count)
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}
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.buttonStyle(SmallLinkButtonStyle())
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.padding(.top, 8)
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} else if !failure.isEmpty {
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Text(failure).foregroundStyle(Palette.muted).padding(.top, 12)
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}
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}
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.padding(.horizontal, 16)
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.padding(.bottom, 16)
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.frame(maxWidth: .infinity, alignment: .leading)
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}
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.frame(maxWidth: .infinity, maxHeight: .infinity)
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.background(Palette.bg)
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.task {
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await load()
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}
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}
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private var current: WorkflowDefinition? {
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root.map { WorkflowDefinition(description: description.isEmpty ? nil : description, steps: $0.children.map(\.step)) }
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}
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private var target: String {
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name.trimmingCharacters(in: .whitespaces)
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}
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private var changed: Bool {
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original == nil || current != loaded || target != original
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}
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private func load() async {
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guard let original else {
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let r = StepNode(kind: .order)
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r.insert(newStage(r, store.defaultModel), at: 0)
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root = r
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return
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}
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do {
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let def = try await store.api.client.getWorkflow(path: .init(name: original), headers: .init(accept: [.init(contentType: .json)])).ok.body.json
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name = original
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description = def.description ?? ""
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root = StepNode(kind: .order, children: def.steps.map { StepNode($0) })
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loaded = current
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} catch {
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failure = errorText(error)
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}
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}
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private func save() async {
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guard let def = current else {
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return
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}
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saving = true
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defer { saving = false }
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do {
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_ = try await store.api.client.putWorkflow(path: .init(name: target), query: .init(from: original), body: .json(def)).ok.body.json
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close()
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} catch {
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failure = errorText(error)
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}
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}
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private func leave() async {
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if changed, current != nil, !(await overlays.showConfirm(["This workflow has unsaved changes."], action: "Discard changes", danger: true)) {
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return
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}
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close()
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}
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}
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private struct StepRow: View {
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@Bindable var node: StepNode
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let guide: String
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let root: StepNode
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@Environment(Store.self) private var store
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@ViewState private var target = false
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var body: some View {
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VStack(alignment: .leading, spacing: 6) {
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HStack(alignment: .firstTextBaseline, spacing: 6) {
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Text(guide).foregroundStyle(Palette.muted)
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switch node.kind {
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case .stage:
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Button {
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node.open.toggle()
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} label: {
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Image(systemName: node.open ? "chevron.down" : "chevron.right")
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.font(.system(size: 9, weight: .semibold))
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.foregroundStyle(Palette.muted)
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.frame(width: 12)
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}
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.buttonStyle(.plain)
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TextField("Stage name", text: $node.name)
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.textFieldStyle(.plain)
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.font(Fonts.font(13, weight: 700))
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if let agents = node.agents {
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Text("team of \(agents.count)").foregroundStyle(Palette.muted).fixedSize()
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} else {
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StepModelMenu(model: $node.model)
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}
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case .order:
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Text("in order").foregroundStyle(Palette.muted)
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Spacer()
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case .parallel:
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Text("in parallel").foregroundStyle(Palette.muted)
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Spacer()
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}
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actions
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}
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.padding(.vertical, 3)
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.background(target ? Palette.accentTint : .clear, in: RoundedRectangle(cornerRadius: 4))
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.draggable(node.id.uuidString)
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.dropDestination(for: String.self) { items, _ in
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drop(items)
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} isTargeted: {
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target = $0
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}
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if node.kind == .stage && node.open {
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VStack(alignment: .leading, spacing: 6) {
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if node.agents != nil {
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Text("Every agent's prompt").foregroundStyle(Palette.muted)
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}
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PromptEditor(text: $node.prompt)
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if let agents = node.agents {
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ForEach(agents.indices, id: \.self) { i in
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HStack(spacing: 6) {
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TextField("Agent name", text: Binding(get: { node.agents?[i].name ?? "" }, set: { node.agents?[i].name = $0 }))
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.textFieldStyle(.plain)
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.font(Fonts.font(13, weight: 700))
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StepModelMenu(model: Binding(get: { node.agents?[i].model ?? "" }, set: { node.agents?[i].model = $0 }))
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}
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.padding(.top, 4)
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PromptEditor(text: Binding(get: { node.agents?[i].prompt ?? "" }, set: { node.agents?[i].prompt = $0 }))
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}
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}
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}
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.padding(.leading, CGFloat(guide.count) * 8 + 18)
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.padding(.bottom, 8)
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}
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}
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}
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private var actions: some View {
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Menu {
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switch node.kind {
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case .stage:
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Button("Add stage after") { addAfter() }
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Button("Run in parallel with a new stage") { wrap(.parallel) }
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Button("Group with a new stage in order") { wrap(.order) }
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case .order, .parallel:
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Button("Add stage inside") { node.insert(stage(), at: node.children.count) }
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Button("Add stage after") { addAfter() }
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Button(node.kind == .order ? "Change to in parallel" : "Change to in order") {
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node.kind = node.kind == .order ? .parallel : .order
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}
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Button("Ungroup") { ungroup() }
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}
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Divider()
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let siblings = node.parent?.children ?? []
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let i = siblings.firstIndex { $0 === node }
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Button("Move up") { move(-1) }
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.disabled(i == nil || i == 0)
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Button("Move down") { move(1) }
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.disabled(i == nil || i == siblings.count - 1)
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Divider()
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Button("Remove") { node.detach() }
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} label: {
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Image(systemName: "ellipsis")
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.font(.system(size: 11, weight: .semibold))
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.foregroundStyle(Palette.muted)
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.frame(width: 20, height: 16)
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.contentShape(Rectangle())
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}
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.menuStyle(.button)
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.buttonStyle(.plain)
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.menuIndicator(.hidden)
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.fixedSize()
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}
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private func stage() -> StepNode {
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newStage(root, store.defaultModel)
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}
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private func addAfter() {
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node.parent!.insert(stage(), at: node.index + 1)
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}
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private func wrap(_ kind: StepNode.Kind) {
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let parent = node.parent!
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let i = node.index
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node.detach()
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let group = StepNode(kind: kind)
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group.insert(node, at: 0)
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group.insert(stage(), at: 1)
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parent.insert(group, at: i)
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}
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private func ungroup() {
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let parent = node.parent!
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let i = node.index
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let children = node.children
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node.detach()
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for (n, c) in children.enumerated() {
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parent.insert(c, at: i + n)
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}
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}
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private func move(_ by: Int) {
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let parent = node.parent!
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let i = node.index
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node.detach()
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parent.insert(node, at: i + by)
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}
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private func drop(_ items: [String]) -> Bool {
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guard let id = items.first.flatMap(UUID.init(uuidString:)), let dragged = find(root, id), !dragged.contains(node) else {
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return false
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}
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dragged.detach()
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if node.kind == .stage {
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node.parent!.insert(dragged, at: node.index)
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} else {
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node.insert(dragged, at: node.children.count)
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}
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return true
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}
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private func find(_ n: StepNode, _ id: UUID) -> StepNode? {
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if n.id == id {
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return n
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}
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for c in n.children {
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if let f = find(c, id) {
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return f
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}
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}
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return nil
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}
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}
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private struct StepModelMenu: View {
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@Binding var model: String
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var body: some View {
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Menu {
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ForEach(models, id: \.self) { m in
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Button(m) { model = m }
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}
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} label: {
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HStack(spacing: 6) {
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Text(model.isEmpty ? "model" : model)
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Image(systemName: "chevron.up.chevron.down")
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.font(.system(size: 8, weight: .semibold))
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}
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.font(Fonts.font(12))
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.foregroundStyle(model.isEmpty ? Palette.muted : Palette.text)
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.contentShape(Rectangle())
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}
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.menuStyle(.button)
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.buttonStyle(.plain)
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.menuIndicator(.hidden)
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.fixedSize()
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}
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}
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private struct PromptEditor: View {
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@Binding var text: String
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@FocusState private var focused: Bool
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var body: some View {
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TextEditor(text: $text)
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.font(Fonts.font(12))
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.scrollContentBackground(.hidden)
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.writingToolsBehavior(.disabled)
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.focused($focused)
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.padding(.horizontal, 5)
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.padding(.vertical, 4)
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.frame(height: 160)
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.background(Palette.raised, in: RoundedRectangle(cornerRadius: 6))
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.overlay(alignment: .topLeading) {
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if text.isEmpty {
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Text("Prompt…")
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.foregroundStyle(Palette.muted)
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.padding(.horizontal, 10)
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.padding(.vertical, 4)
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.allowsHitTesting(false)
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}
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}
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.overlay(RoundedRectangle(cornerRadius: 6).stroke(focused ? Palette.accent : Palette.border))
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}
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}
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