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export abstract class DocOp {
abstract key: string;
}
export class CreateGridOp extends DocOp {
gridId: string = crypto.randomUUID();
rows = 4;
key = this.gridId;
baseCellsPerRow = 16;
}
export default class Doc {
readonly ops: DocOp[];
readonly opsByKey: Map<string, readonly DocOp[]>;
readonly opsByType: Map<Function, readonly DocOp[]>;
constructor(ops: DocOp[]) {
this.ops = ops;
const opsByKey = new Map();
const opsByType = new Map();
for (const op of ops) {
const maybeKeyOps = opsByKey.get(op.key);
if (maybeKeyOps) maybeKeyOps.push(op);
else opsByKey.set(op.key, [op]);
const maybeTypeOps = opsByType.get(op.constructor);
if (maybeTypeOps) maybeTypeOps.push(op);
else opsByType.set(op.constructor, [op]);
}
this.opsByKey = opsByKey;
this.opsByType = opsByType;
}
static default(): Doc {
return new Doc([new CreateGridOp()]);
}
get grids(): Grid[] {
const ops = this.opsByType.get(CreateGridOp) ?? [];
return ops.map((op) => new Grid(this, op as CreateGridOp));
}
}
export class Grid {
readonly doc: Doc;
readonly id: string;
readonly rows: readonly Row[];
constructor(doc: Doc, createOp: CreateGridOp) {
this.doc = doc;
this.id = createOp.gridId;
const rows: Row[] = [];
for (let rowIndex = 0; rowIndex < createOp.rows; rowIndex++) {
rows.push(new Row(doc, this.id, rowIndex));
}
this.rows = rows;
}
}
export class Row {
readonly doc: Doc;
readonly gridId: string;
readonly index: number;
readonly cells: readonly Cell[];
constructor(doc: Doc, gridId: string, index: number) {
this.doc = doc;
this.gridId = gridId;
this.index = index;
const createGridOp = doc.opsByType
.get(CreateGridOp)
?.find((op) => op.key === gridId)! as CreateGridOp;
const cells: Cell[] = [];
for (
let cellIndex = 0;
cellIndex < createGridOp.baseCellsPerRow;
cellIndex++
) {
cells.push(new Cell(doc, gridId, index, cellIndex));
}
this.cells = cells;
}
}
export class Cell {
readonly doc: Doc;
readonly gridId: string;
readonly rowIndex: number;
readonly index: number;
constructor(doc: Doc, gridId: string, rowIndex: number, index: number) {
this.doc = doc;
this.gridId = gridId;
this.rowIndex = rowIndex;
this.index = index;
}
}
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