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Add util for creating formula from a modifier

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This commit is contained in:
thepaperpilot 2023-02-27 22:44:30 -06:00
parent be9a85c14e
commit 3489c83cc4
1 changed files with 22 additions and 1 deletions
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23
src/data/common.tsx
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@ -8,7 +8,7 @@ import { GenericMilestone } from "features/milestones/milestone";
import { displayResource, Resource } from "features/resources/resource";
import type { GenericTree, GenericTreeNode, TreeNode, TreeNodeOptions } from "features/trees/tree";
import { createTreeNode } from "features/trees/tree";
import { GenericFormula } from "game/formulas";
import Formula, { FormulaSource, GenericFormula, InvertibleFormula } from "game/formulas";
import type { Modifier } from "game/modifiers";
import type { Persistent } from "game/persistence";
import { DefaultValue, persistent } from "game/persistence";
@ -490,3 +490,24 @@ export function createFormulaPreview(
return formatSmall(formula.evaluate());
});
}
export function modifierToFormula<T extends GenericFormula>(
modifier: WithRequired<Modifier, "revert">,
base: T
): T;
export function modifierToFormula(modifier: Modifier, base: FormulaSource): GenericFormula;
export function modifierToFormula(modifier: Modifier, base: FormulaSource) {
return new Formula({
inputs: [base],
evaluate: val => modifier.apply(val),
invert:
"revert" in modifier && modifier.revert != null
? (val, lhs) => {
if (lhs instanceof Formula && lhs.hasVariable()) {
return lhs.invert(modifier.revert!(val));
}
throw "Could not invert due to no input being a variable";
}
: undefined
});
}