snapshot of https://github.com/cortezaproject/corteza.git (2024.9.x, 2026-09-18; blobs > 131072B omitted)

server/pkg/wfexec/graph.go

@@ -0,0 +1,78 @@
+package wfexec
+
+import (
+	"context"
+)
+
+type (
+	// list of Graph steps with relations
+	Graph struct {
+		steps    []Step
+		children map[Step][]Step
+		parents  map[Step][]Step
+		index    map[uint64]Step
+	}
+)
+
+func NewGraph() *Graph {
+	wf := &Graph{
+		steps:    make([]Step, 0, 1024),
+		children: make(map[Step][]Step),
+		parents:  make(map[Step][]Step),
+		index:    make(map[uint64]Step),
+	}
+
+	return wf
+}
+
+func (g *Graph) AddStep(s Step, cc ...Step) {
+	g.steps = append(g.steps, s)
+
+	if id := s.ID(); id != 0 {
+		g.index[id] = s
+	}
+
+	if len(cc) > 0 {
+		for _, c := range cc {
+			g.AddParent(c, s)
+		}
+	}
+}
+
+func (g *Graph) Len() int {
+	return len(g.steps)
+}
+
+func (g *Graph) StepByID(ID uint64) Step {
+	return g.index[ID]
+}
+
+func (g *Graph) AddParent(c, p Step) {
+	g.parents[c] = append(g.parents[c], p)
+	g.children[p] = append(g.children[p], c)
+}
+
+func (g *Graph) Children(s Step) Steps {
+	return g.children[s]
+}
+
+func (g *Graph) Parents(s Step) Steps {
+	return g.parents[s]
+}
+
+func (g *Graph) Exec(context.Context, *ExecRequest) (ExecResponse, error) {
+	// @todo
+	return nil, nil
+}
+
+func (g *Graph) Orphans() (oo Steps) {
+	for _, step := range g.steps {
+		if len(g.Parents(step)) > 0 {
+			continue
+		}
+
+		oo = append(oo, step)
+	}
+
+	return
+}