58 lines
1.6 KiB
TypeScript
58 lines
1.6 KiB
TypeScript
namespace datalog.ev3 {
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/**
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* A datalog storage for the EV3
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*/
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export class EV3DatalogStorage extends DatalogStorage {
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private _filename: string;
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private _buffer: string;
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private _storage: storage.Storage;
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/**
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* Creates a new storage for the datalog
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* @param storage
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* @param filename
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*/
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constructor(storage: storage.Storage, filename: string) {
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super();
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this._filename = filename;
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this._storage = storage;
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}
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/**
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* Initializes the storage
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*/
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init(): void {
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this._storage.remove(this._filename);
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this._buffer = "";
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}
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/**
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* Appends the headers in datalog
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*/
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appendHeaders(headers: string[]): void {
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this._storage.appendCSVHeaders(this._filename, headers);
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}
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/**
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* Appends a row of data
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*/
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appendRow(values: number[]): void {
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// commit row data
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this._buffer += storage.toCSV(values, this._storage.csvSeparator);
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// buffered writes
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if (this._buffer.length > 512)
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this.flush();
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}
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/**
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* Flushes any buffered data
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*/
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flush(): void {
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if (this._buffer) {
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const b = this._buffer;
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this._buffer = "";
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this._storage.append(this._filename, b);
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}
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}
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}
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// automatic hook up
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datalog.setStorage(new datalog.ev3.EV3DatalogStorage(storage.temporary, "datalog.csv"));
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}
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