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// Available variables: | |
// - Machine | |
// - interpret | |
// - assign | |
// - send | |
// - sendParent | |
// - spawn | |
// - raise | |
// - actions | |
// - XState (all XState exports) | |
const fetchMachine = Machine({ | |
id: 'boardLogic', | |
initial: 'idle', | |
context: { | |
width: 4, | |
height: 8, | |
tileTypes: 4, | |
topmostRow: 8 - 1, | |
bottommostRow: 0, | |
leftmostColumn: 0, | |
rightmostColumn: 4 - 1, | |
/** @type {number} In seconds. */ | |
growthSpeed: 1, | |
/** @type {number} In seconds. */ | |
growthElapsed: 0, | |
rowSelected: 0, | |
}, | |
states: { | |
idle: { | |
on: { | |
GROW: 'ticking', | |
MOVE_ROW_SELECTOR_UP: { | |
actions: ['moveSelectorUp'], | |
}, | |
MOVE_ROW_SELECTOR_DOWN: { | |
actions: ['moveSelectorDown'], | |
}, | |
ROTATE_ROW_LEFT: 'awaitingMatchResolution', | |
ROTATE_ROW_RIGHT: 'awaitingMatchResolution', | |
}, | |
}, | |
ticking: { | |
entry: 'grow', | |
always: [ | |
{ target: 'addingRow', cond: 'shouldAddRow' }, | |
{ target: 'idle' }, | |
], | |
}, | |
addingRow: { | |
entry: 'addRow', | |
always: {target: 'awaitingMatchResolution'}, | |
}, | |
awaitingMatchResolution: { | |
on: { | |
RESOLVE_MATCHES: 'awaitingGravityResolution', | |
}, | |
}, | |
awaitingGravityResolution: { | |
on: { | |
RESOLVE_GRAVITY: 'gravityResolved', | |
}, | |
}, | |
gravityResolved: { | |
always: { target: 'idle' }, | |
}, | |
gameOver: { | |
type: 'final', | |
}, | |
}, | |
}, | |
{ | |
guards: { | |
shouldAddRow: ({ growthElapsed, growthSpeed }) => { | |
return growthElapsed > growthSpeed; | |
}, | |
}, | |
actions: { | |
grow: assign({ | |
growthElapsed: (context, event) => { | |
return context.growthElapsed + 0.2; | |
}, | |
}), | |
addRow: assign({ | |
growthElapsed: context => 0, | |
// TODO: update the board | |
}), | |
moveSelectorUp: assign({ | |
rowSelected: context => { | |
const min = context.bottommostRow; | |
const max = context.topmostRow; | |
const n = context.rowSelected + 1; | |
// return clamp(min, max, n); | |
return Math.min(Math.max(n, min), max); | |
}, | |
}), | |
moveSelectorDown: assign({ | |
rowSelected: context => { | |
const min = context.bottommostRow; | |
const max = context.topmostRow; | |
const n = context.rowSelected - 1; | |
// return clamp(min, max, n); | |
return Math.min(Math.max(n, min), max); | |
}, | |
}), | |
}, | |
}); | |
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