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mod.ts
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mod.ts
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import { SlackManifest } from "../manifest/mod.ts";
import { ManifestWorkflowSchema } from "../manifest/manifest_schema.ts";
import { ISlackFunctionDefinition } from "../functions/types.ts";
import {
ParameterSetDefinition,
ParameterVariableType,
PossibleParameterKeys,
} from "../parameters/types.ts";
import { ParameterVariable } from "../parameters/mod.ts";
import {
TypedWorkflowStepDefinition,
UntypedWorkflowStepDefinition,
WorkflowStepDefinition,
} from "./workflow-step.ts";
import {
ISlackWorkflow,
SlackWorkflowDefinitionArgs,
WorkflowInputs,
WorkflowOutputs,
WorkflowStepInputs,
} from "./types.ts";
export const DefineWorkflow = <
Inputs extends ParameterSetDefinition,
Outputs extends ParameterSetDefinition,
RequiredInputs extends PossibleParameterKeys<Inputs>,
RequiredOutputs extends PossibleParameterKeys<Outputs>,
CallbackID extends string,
>(
definition: SlackWorkflowDefinitionArgs<
Inputs,
Outputs,
RequiredInputs,
RequiredOutputs,
CallbackID
>,
) => {
return new WorkflowDefinition(definition);
};
export class WorkflowDefinition<
Inputs extends ParameterSetDefinition,
Outputs extends ParameterSetDefinition,
RequiredInputs extends PossibleParameterKeys<Inputs>,
RequiredOutputs extends PossibleParameterKeys<Outputs>,
CallbackID extends string,
> implements ISlackWorkflow {
public id: string;
public definition: SlackWorkflowDefinitionArgs<
Inputs,
Outputs,
RequiredInputs,
RequiredOutputs,
CallbackID
>;
public inputs: WorkflowInputs<
Inputs,
RequiredInputs
>;
public outputs: WorkflowOutputs<
Outputs,
RequiredOutputs
>;
steps: WorkflowStepDefinition[] = [];
constructor(
definition: SlackWorkflowDefinitionArgs<
Inputs,
Outputs,
RequiredInputs,
RequiredOutputs,
CallbackID
>,
) {
this.id = definition.callback_id;
this.definition = definition;
this.inputs = {} as WorkflowInputs<
Inputs,
RequiredInputs
>;
this.outputs = {} as WorkflowOutputs<
Outputs,
RequiredOutputs
>;
for (
const [inputName, inputDefinition] of Object.entries(
definition.input_parameters?.properties
? definition.input_parameters.properties
: {},
)
) {
// deno-lint-ignore ban-ts-comment
//@ts-ignore
this.inputs[
inputName as keyof Inputs
] = ParameterVariable(
"inputs",
inputName,
inputDefinition,
) as ParameterVariableType<
Inputs[typeof inputName]
>;
}
}
// Supports adding a typed step where an ISlackFunctionDefinition reference is used, which produces typed inputs and outputs
// and the functionReference string can be rerived from that ISlackFunctionDefinition reference
// Important that this overload is 1st, as it's the more specific match, and preffered type if it matches
addStep<
StepInputs extends ParameterSetDefinition,
StepOutputs extends ParameterSetDefinition,
RequiredStepInputs extends PossibleParameterKeys<StepInputs>,
RequiredStepOutputs extends PossibleParameterKeys<StepOutputs>,
>(
slackFunction: ISlackFunctionDefinition<
StepInputs,
StepOutputs,
RequiredStepInputs,
RequiredStepOutputs
>,
inputs: WorkflowStepInputs<StepInputs, RequiredStepInputs>,
): TypedWorkflowStepDefinition<
StepInputs,
StepOutputs,
RequiredStepInputs,
RequiredStepOutputs
>;
// Supports adding an untyped step by using a plain function reference string and input configuration
// This won't support any typed inputs or outputs on the step, but can be useful when adding a step w/o the type definition available
addStep(
functionReference: string,
// This is essentially an untyped step input configuration
inputs: WorkflowStepInputs<
ParameterSetDefinition,
PossibleParameterKeys<ParameterSetDefinition>
>,
): UntypedWorkflowStepDefinition;
// The runtime implementation of addStep handles both signatures (straight function-reference & config, or ISlackFunctionDefinition)
addStep<
StepInputs extends ParameterSetDefinition,
StepOutputs extends ParameterSetDefinition,
RequiredStepInputs extends PossibleParameterKeys<StepInputs>,
RequiredStepOutputs extends PossibleParameterKeys<StepOutputs>,
>(
functionOrReference:
| string
| ISlackFunctionDefinition<
StepInputs,
StepOutputs,
RequiredStepInputs,
RequiredStepOutputs
>,
inputs: WorkflowStepInputs<StepInputs, RequiredStepInputs>,
): WorkflowStepDefinition {
const stepId = `${this.steps.length}`;
if (typeof functionOrReference === "string") {
const newStep = new UntypedWorkflowStepDefinition(
stepId,
functionOrReference,
inputs,
);
this.steps.push(newStep);
return newStep;
}
const slackFunction = functionOrReference as ISlackFunctionDefinition<
StepInputs,
StepOutputs,
RequiredStepInputs,
RequiredStepOutputs
>;
const newStep = new TypedWorkflowStepDefinition(
stepId,
slackFunction,
inputs,
);
this.steps.push(newStep);
return newStep;
}
export(): ManifestWorkflowSchema {
return {
title: this.definition.title,
description: this.definition.description,
input_parameters: this.definition.input_parameters,
steps: this.steps.map((s) => s.export()),
};
}
registerStepFunctions(manifest: SlackManifest) {
this.steps.forEach((s) => s.registerFunction(manifest));
}
registerParameterTypes(manifest: SlackManifest) {
const { input_parameters: inputParams, output_parameters: outputParams } =
this.definition;
manifest.registerTypes(inputParams?.properties ?? {});
manifest.registerTypes(outputParams?.properties ?? {});
}
toJSON() {
return this.export();
}
}