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/**
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* Hachette storage through connection (server side)
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*
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* Copyright (C) 2021 Wojtek Kosior
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* Redistribution terms are gathered in the `copyright' file.
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*/
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/*
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* IMPORTS_START
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* IMPORT listen_for_connection
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* IMPORT get_storage
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* IMPORT list_prefixes
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* IMPORT CONNECTION_TYPE
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* IMPORTS_END
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*/
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var storage;
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async function handle_remote_call(port, message)
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{
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let [call_id, func, args] = message;
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try {
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let result = await Promise.resolve(storage[func](...args));
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port.postMessage({call_id, result});
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} catch (error) {
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error = error + '';
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port.postMessage({call_id, error});
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}
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}
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function remove_storage_listener(cb)
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{
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storage.remove_change_listener(cb);
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}
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function new_connection(port)
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{
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console.log("new remote storage connection!");
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const message = {};
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for (const prefix of list_prefixes)
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message[prefix] = storage.get_all(prefix);
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port.postMessage(message);
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let handle_change = change => port.postMessage(change);
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storage.add_change_listener(handle_change);
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port.onMessage.addListener(m => handle_remote_call(port, m));
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port.onDisconnect.addListener(() =>
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remove_storage_listener(handle_change));
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}
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async function start_storage_server()
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{
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storage = await get_storage();
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listen_for_connection(CONNECTION_TYPE.REMOTE_STORAGE, new_connection);
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}
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/*
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* EXPORTS_START
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* EXPORT start_storage_server
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* EXPORTS_END
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*/
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