counters: move triggers to counters plugin; architectural tweaks

backend/src/data/entities/CounterTrigger.ts

@@ -4,6 +4,37 @@ export const TRIGGER_COMPARISON_OPS = ["=", "!=", ">", "<", ">=", "<="] as const
 
 export type TriggerComparisonOp = typeof TRIGGER_COMPARISON_OPS[number];
 
+const REVERSE_OPS: Record<TriggerComparisonOp, TriggerComparisonOp> = {
+  "=": "!=",
+  "!=": "=",
+  ">": "<=",
+  "<": ">=",
+  ">=": "<",
+  "<=": ">",
+};
+
+export function getReverseCounterComparisonOp(op: TriggerComparisonOp): TriggerComparisonOp {
+  return REVERSE_OPS[op];
+}
+
+const comparisonStringRegex = new RegExp(`^(${TRIGGER_COMPARISON_OPS.join("|")})([1-9]\\d*)$`);
+
+/**
+ * @return Parsed comparison op and value, or null if the comparison string was invalid
+ */
+export function parseCounterConditionString(str: string): [TriggerComparisonOp, number] | null {
+  const matches = str.match(comparisonStringRegex);
+  return matches ? [matches[1] as TriggerComparisonOp, parseInt(matches[2], 10)] : null;
+}
+
+export function buildCounterConditionString(comparisonOp: TriggerComparisonOp, comparisonValue: number): string {
+  return `${comparisonOp}${comparisonValue}`;
+}
+
+export function isValidCounterComparisonOp(op: string): boolean {
+  return TRIGGER_COMPARISON_OPS.includes(op as any);
+}
+
 @Entity("counter_triggers")
 export class CounterTrigger {
   @PrimaryGeneratedColumn()
@@ -12,12 +43,21 @@ export class CounterTrigger {
   @Column()
   counter_id: number;
 
+  @Column()
+  name: string;
+
   @Column({ type: "varchar" })
   comparison_op: TriggerComparisonOp;
 
   @Column()
   comparison_value: number;
 
+  @Column({ type: "varchar" })
+  reverse_comparison_op: TriggerComparisonOp;
+
+  @Column()
+  reverse_comparison_value: number;
+
   @Column({ type: "datetime", nullable: true })
   delete_at: string | null;
 }