feat: finish implementation and documentation

README.md

@@ -7,3 +7,80 @@ declare zod schemas that can be inverted to format from output to input
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+
+# Example
+
+```sh
+npm i zod-invertible
+# OR
+pnpm i zod-invertible
+```
+
+```ts
+import z from 'zod'
+import { invertible, invert } from 'zod-intertible'
+
+const StringToNumber = invertible(
+  z.string(),
+  (s, ctx) => {
+    const result = parseFloat(s)
+    if (isNaN(result)) {
+      ctx.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: 'invalid float',
+      })
+    }
+    return result
+  },
+  z.number(),
+  (n) => String(n)
+)
+
+StringToNumber.parse('3.5') // 3.5
+
+const NumberToString = invert(StringToNumber)
+
+NumberToString.parse(3.5) // '3.5'
+
+const obj = z.object({ foo: StringToNumber })
+obj.parse({ foo: '3.5' }) // { foo: 3.5 }
+// invert works deeply:
+invert(obj).parse({ foo: 3.5 }) // { foo: '3.5' }
+```
+
+## `invertible(inputSchema, parse, outputSchema, format)`
+
+Creates an invertible schema that transforms from an input type to a different output type.
+
+### `inputSchema`
+
+The `ZodType` for validating the input value
+
+### `parse`
+
+The function for transforming the input value into the output value. It is called with two arguments:
+
+- `value`: the output of `inputSchema`
+- `ctx`: the zod `RefinementCtx`
+
+`parse` may be `async`.
+
+### `outputSchema`
+
+The `ZodType` for validating the output
+
+### `format`
+
+The function for converting from the output value back into the input value. It is called with two arguments:
+
+- `value`: the input of `outputSchema`
+- `ctx`: the zod `RefinementCtx`
+
+`format` may be `async`.
+
+## `invert(schema)`
+
+Deeply inverts a zod schema, inverting any `ZodInvertible` schemas inside it, and otherwise preserving the structure of
+objects, arrays, etc.
+
+If the zod schema parses input type `I` into output type `O`, the inverted schema will parse input type `O` into output type `I`.

package.json

@@ -26,11 +26,14 @@
     "@jcoreio/toolchain-mocha": "^4.6.0",
     "@jcoreio/toolchain-semantic-release": "^4.6.0",
     "@jcoreio/toolchain-typescript": "^4.6.0",
+    "@types/chai": "^4.0.0",
+    "@types/mocha": "^10.0.0",
     "@typescript-eslint/eslint-plugin": "^7.6.0",
     "@typescript-eslint/parser": "^7.6.0",
+    "chai": "^4.0.0",
     "eslint": "^8.56.0",
     "eslint-plugin-no-only-tests": "^3.1.0",
-    "mocha": "^10.2.0",
+    "mocha": "^10.4.0",
     "typescript": "^5.1.0"
   },
   "version": "0.0.0-development",
@@ -46,6 +49,7 @@
   },
   "packageManager": "pnpm@8.11.0",
   "dependencies": {
-    "@babel/runtime": "^7.18.6"
+    "@babel/runtime": "^7.18.6",
+    "zod": "^3.23.8"
   }
 }