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master
Sven Slootweg 1 year ago
commit
16e6ace8df
  1. 1
      .gitignore
  2. 5
      README.md
  3. 34
      example.js
  4. 77
      index.js
  5. 26
      package.json
  6. 212
      yarn.lock

1
.gitignore

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node_modules

5
README.md

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# @validatem/has-shape
Documentation for this module has not been fully written yet. By the time it reaches 1.0.0, it will have full documentation.
In the meantime, check out the `example.js` file in the repository for a usage demonstration.

34
example.js

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"use strict";
const hasShape = require("./");
const { validateValue } = require("@validatem/core"); /* FIXME: Add this as a devDep */
const isString = require("@validatem/is-string");
let validator = hasShape({
foo: [ isString ]
});
let objectA = {
foo: "bar"
};
console.log(validateValue(objectA, validator)); // { foo: 'bar' }
let objectB = {
foo: 42
};
console.log(validateValue(objectB, validator)); /*
AggregrateValidationError: One or more validation errors occurred:
- At foo: Must be a string
*/
let objectC = {
foo: "hello world",
otherProperty: "baz"
};
console.log(validateValue(objectC, validator)); /*
AggregrateValidationError: One or more validation errors occurred:
- At (root): Encountered an unexpected property 'otherProperty'
*/

77
index.js

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"use strict";
const asExpression = require("as-expression");
const defaultValue = require("default-value");
const flat = require("array.prototype.flat");
const ValidationError = require("@validatem/error");
const validationResult = require("@validatem/validation-result");
const annotateErrors = require("@validatem/annotate-errors");
const combinator = require("@validatem/combinator");
function containsRules(rules) {
// TODO: We cannot use normalize-rules here (for now) since that would create a cyclical dependency; figure out a way to work around this, maybe by removing the hasShape feature in `normalize-rules`, or moving the flattening itself out into a separate `flatten-rules` package?
if (rules == null) {
return false;
} else {
// TODO: Switch to `Array#flat` once it is available
let flattenedRules = flat(rules);
if (!flattenedRules.some((rule) => rule != null)) {
return false;
} else {
return true;
}
}
}
module.exports = function hasShape(rules) {
return combinator((object, applyValidators, context) => {
let allowExtraProperties = defaultValue(context.allowExtraProperties, false);
let unexpectedPropertyErrors = asExpression(() => {
if (!allowExtraProperties) {
return Object.keys(object).map((propertyName) => {
if (!containsRules(rules[propertyName])) {
return new ValidationError(`Encountered an unexpected property '${propertyName}'`);
} else {
return null;
}
}).filter((error) => {
return (error != null);
});
} else {
return [];
}
});
if (unexpectedPropertyErrors.length > 0) {
return validationResult({
errors: unexpectedPropertyErrors,
newValue: object
});
} else {
let errors = [];
let newObject = {};
for (let [ key, rule ] of Object.entries(rules)) {
let value = object[key];
let { errors: keyErrors, newValue } = applyValidators(value, rule);
let annotatedErrors = annotateErrors({
pathSegments: [ key ],
errors: keyErrors
});
errors.push(... annotatedErrors);
newObject[key] = newValue;
}
return validationResult({
errors: errors,
newValue: newObject
});
}
});
};

26
package.json

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{
"name": "@validatem/has-shape",
"description": "Validatem combinator for validating that a value has certain keys that pass certain validators (eg. object validation)",
"keywords": [
"validatem",
"validator",
"combinator"
],
"version": "0.1.0",
"main": "index.js",
"repository": "http://git.cryto.net/validatem/has-shape.git",
"author": "Sven Slootweg <admin@cryto.net>",
"license": "WTFPL OR CC0-1.0",
"dependencies": {
"@validatem/annotate-errors": "^0.1.2",
"@validatem/combinator": "^0.1.0",
"@validatem/error": "^1.0.0",
"@validatem/validation-result": "^0.1.1",
"array.prototype.flat": "^1.2.3",
"as-expression": "^1.0.0",
"default-value": "^1.0.0"
},
"devDependencies": {
"@validatem/is-string": "^0.1.0"
}
}

212
yarn.lock

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# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
# yarn lockfile v1
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