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make XmlAttributeComponent into a generic class

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This change brings increased type safety to uses of
XmlAttributeComponent. Now the compiler is checkign for us that the
properties that get passed in to every subclass match the intended
interface, and also that the xmlKeys property -> xml attribute mapping
has all the right keys
This commit is contained in:
felipe
2017-03-10 10:42:24 +01:00
parent 766069c7cc
commit 62911d6e44
12 changed files with 100 additions and 154 deletions
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32
ts/docx/xml-components/default-attributes.ts
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@ -1,31 +1,25 @@
import * as _ from "lodash";
import { BaseXmlComponent } from "./base";
export abstract class XmlAttributeComponent extends BaseXmlComponent {
protected root: object;
private xmlKeys: object;
type AttributeMap<T> = {[P in keyof T]: string};
constructor(xmlKeys: object, properties: object) {
export abstract class XmlAttributeComponent<T> extends BaseXmlComponent {
protected root: T;
protected xmlKeys: AttributeMap<T>;
constructor(properties: T) {
super("_attr");
this.xmlKeys = xmlKeys;
this.root = properties;
if (!properties) {
this.root = {};
}
}
public prepForXml(): {_attr: {[key: string]: (string | number | boolean)}} {
const attrs = {};
if (this.root !== undefined) {
_.forOwn(this.root, (value, key) => {
if (value !== undefined) {
const newKey = this.xmlKeys[key];
attrs[newKey] = value;
}
});
}
Object.keys(this.root).forEach((key) => {
const value = this.root[key];
if (value !== undefined) {
const newKey = this.xmlKeys[key];
attrs[newKey] = value;
}
});
return {_attr: attrs};
}
}