syphonx-core/dist/esm/package/extract.js

SyphonX is a template-driven solution for extracting data from HTML in a highly efficient way. It combines the power of jQuery, Regular Expressions, and Javascript into a declarative template-driven format that extracts and reshapes HTML data into JSON.

import { Controller } from "./controller.js";
import { unpatch, unwrap } from "./lib/index.js";
export async function extract(state) {
    if (typeof state?.vars?.__instance === "number")
        state.vars.__instance += 1;
    const controller = new Controller(state);
    controller.log(`ENTRY #${controller.state.vars.__instance}${controller.online ? ` ${window.location.href}` : ""}`);
    controller.log(`VARS ${JSON.stringify(controller.state.vars)}`);
    if (controller.state.unpatch) {
        unpatch(controller.state.unpatch);
        controller.log(`UNPATCHED ${controller.state.unpatch.join(", ")}`);
    }
    try {
        await controller.run(controller.state.actions);
        controller.log("EXIT");
    }
    catch (err) {
        if (err === "YIELD") {
            controller.log("YIELDING");
        }
        else if (err === "STOP") {
            controller.log("STOPPED");
        }
        else {
            controller.appendError("fatal-error", err instanceof Error ? err.message : JSON.stringify(err), 0, err instanceof Error ? err.stack : undefined);
        }
    }
    if (controller.online && state.debug)
        window.postMessage({
            direction: "syphonx",
            message: {
                ...controller.state,
                key: "extract-state"
            }
        });
    if (state.unwrap && !state.yield)
        controller.state.data = unwrap(controller.state.data);
    return controller.state;
}
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