89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
// This module provides methods for creating nodes and relationships according
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// to a defined schema.
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package lib
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import (
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"fmt"
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)
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// ========================================
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// Schema Match Keys
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// ========================================
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func NewMatchKeys() *MatchKeys {
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return &MatchKeys{
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keys: map[string][]string{
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"User": {"pubkey"},
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"Relay": {"url"},
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"Event": {"id"},
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"Tag": {"name", "value"},
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},
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}
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}
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// ========================================
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// Node Constructors
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// ========================================
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func NewUserNode(pubkey string) *Node {
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return NewNode("User", Properties{"pubkey": pubkey})
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}
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func NewRelayNode(url string) *Node {
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return NewNode("Relay", Properties{"url": url})
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}
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func NewEventNode(id string) *Node {
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return NewNode("Event", Properties{"id": id})
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}
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func NewTagNode(name string, value string) *Node {
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return NewNode("Tag", Properties{"name": name, "value": value})
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}
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// ========================================
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// Relationship Constructors
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// ========================================
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func NewSignedRel(
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start *Node, end *Node, props Properties) *Relationship {
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return NewRelationshipWithValidation(
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"SIGNED", "User", "Event", start, end, props)
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}
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func NewTaggedRel(
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start *Node, end *Node, props Properties) *Relationship {
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return NewRelationshipWithValidation(
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"TAGGED", "Event", "Tag", start, end, props)
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}
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// ========================================
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// Relationship Constructor Helpers
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// ========================================
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func validateNodeLabel(node *Node, role string, expectedLabel string) {
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if !node.Labels.Contains(expectedLabel) {
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panic(fmt.Errorf(
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"expected %s node to have label '%s'. got %v",
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role, expectedLabel, node.Labels.ToArray(),
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),
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)
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}
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}
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func NewRelationshipWithValidation(
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rtype string,
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startLabel string,
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endLabel string,
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start *Node,
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end *Node,
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props Properties) *Relationship {
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validateNodeLabel(start, "start", startLabel)
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validateNodeLabel(end, "end", endLabel)
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return NewRelationship(rtype, start, end, props)
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}
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