|
| 1 | +import {kebabToCamel, camelToKebab} from './text'; |
| 2 | +import {Component} from "../components/component"; |
| 3 | + |
| 4 | +/** |
| 5 | + * Parse out the element references within the given element |
| 6 | + * for the given component name. |
| 7 | + */ |
| 8 | +function parseRefs(name: string, element: HTMLElement): |
| 9 | + {refs: Record<string, HTMLElement>, manyRefs: Record<string, HTMLElement[]>} { |
| 10 | + const refs: Record<string, HTMLElement> = {}; |
| 11 | + const manyRefs: Record<string, HTMLElement[]> = {}; |
| 12 | + |
| 13 | + const prefix = `${name}@`; |
| 14 | + const selector = `[refs*="${prefix}"]`; |
| 15 | + const refElems = [...element.querySelectorAll(selector)]; |
| 16 | + if (element.matches(selector)) { |
| 17 | + refElems.push(element); |
| 18 | + } |
| 19 | + |
| 20 | + for (const el of refElems as HTMLElement[]) { |
| 21 | + const refNames = (el.getAttribute('refs') || '') |
| 22 | + .split(' ') |
| 23 | + .filter(str => str.startsWith(prefix)) |
| 24 | + .map(str => str.replace(prefix, '')) |
| 25 | + .map(kebabToCamel); |
| 26 | + for (const ref of refNames) { |
| 27 | + refs[ref] = el; |
| 28 | + if (typeof manyRefs[ref] === 'undefined') { |
| 29 | + manyRefs[ref] = []; |
| 30 | + } |
| 31 | + manyRefs[ref].push(el); |
| 32 | + } |
| 33 | + } |
| 34 | + return {refs, manyRefs}; |
| 35 | +} |
| 36 | + |
| 37 | +/** |
| 38 | + * Parse out the element component options. |
| 39 | + */ |
| 40 | +function parseOpts(componentName: string, element: HTMLElement): Record<string, string> { |
| 41 | + const opts: Record<string, string> = {}; |
| 42 | + const prefix = `option:${componentName}:`; |
| 43 | + for (const {name, value} of element.attributes) { |
| 44 | + if (name.startsWith(prefix)) { |
| 45 | + const optName = name.replace(prefix, ''); |
| 46 | + opts[kebabToCamel(optName)] = value || ''; |
| 47 | + } |
| 48 | + } |
| 49 | + return opts; |
| 50 | +} |
| 51 | + |
| 52 | +export class ComponentStore { |
| 53 | + /** |
| 54 | + * A mapping of active components keyed by name, with values being arrays of component |
| 55 | + * instances since there can be multiple components of the same type. |
| 56 | + */ |
| 57 | + protected components: Record<string, Component[]> = {}; |
| 58 | + |
| 59 | + /** |
| 60 | + * A mapping of component class models, keyed by name. |
| 61 | + */ |
| 62 | + protected componentModelMap: Record<string, typeof Component> = {}; |
| 63 | + |
| 64 | + /** |
| 65 | + * A mapping of active component maps, keyed by the element components are assigned to. |
| 66 | + */ |
| 67 | + protected elementComponentMap: WeakMap<HTMLElement, Record<string, Component>> = new WeakMap(); |
| 68 | + |
| 69 | + /** |
| 70 | + * Initialize a component instance on the given dom element. |
| 71 | + */ |
| 72 | + protected initComponent(name: string, element: HTMLElement): void { |
| 73 | + const ComponentModel = this.componentModelMap[name]; |
| 74 | + if (ComponentModel === undefined) return; |
| 75 | + |
| 76 | + // Create our component instance |
| 77 | + let instance: Component|null = null; |
| 78 | + try { |
| 79 | + instance = new ComponentModel(); |
| 80 | + instance.$name = name; |
| 81 | + instance.$el = element; |
| 82 | + const allRefs = parseRefs(name, element); |
| 83 | + instance.$refs = allRefs.refs; |
| 84 | + instance.$manyRefs = allRefs.manyRefs; |
| 85 | + instance.$opts = parseOpts(name, element); |
| 86 | + instance.setup(); |
| 87 | + } catch (e) { |
| 88 | + console.error('Failed to create component', e, name, element); |
| 89 | + } |
| 90 | + |
| 91 | + if (!instance) { |
| 92 | + return; |
| 93 | + } |
| 94 | + |
| 95 | + // Add to global listing |
| 96 | + if (typeof this.components[name] === 'undefined') { |
| 97 | + this.components[name] = []; |
| 98 | + } |
| 99 | + this.components[name].push(instance); |
| 100 | + |
| 101 | + // Add to element mapping |
| 102 | + const elComponents = this.elementComponentMap.get(element) || {}; |
| 103 | + elComponents[name] = instance; |
| 104 | + this.elementComponentMap.set(element, elComponents); |
| 105 | + } |
| 106 | + |
| 107 | + /** |
| 108 | + * Initialize all components found within the given element. |
| 109 | + */ |
| 110 | + public init(parentElement: Document|HTMLElement = document) { |
| 111 | + const componentElems = parentElement.querySelectorAll('[component],[components]'); |
| 112 | + |
| 113 | + for (const el of componentElems) { |
| 114 | + const componentNames = `${el.getAttribute('component') || ''} ${(el.getAttribute('components'))}`.toLowerCase().split(' ').filter(Boolean); |
| 115 | + for (const name of componentNames) { |
| 116 | + this.initComponent(name, el as HTMLElement); |
| 117 | + } |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + /** |
| 122 | + * Register the given component mapping into the component system. |
| 123 | + * @param {Object<String, ObjectConstructor<Component>>} mapping |
| 124 | + */ |
| 125 | + public register(mapping: Record<string, typeof Component>) { |
| 126 | + const keys = Object.keys(mapping); |
| 127 | + for (const key of keys) { |
| 128 | + this.componentModelMap[camelToKebab(key)] = mapping[key]; |
| 129 | + } |
| 130 | + } |
| 131 | + |
| 132 | + /** |
| 133 | + * Get the first component of the given name. |
| 134 | + */ |
| 135 | + public first(name: string): Component|null { |
| 136 | + return (this.components[name] || [null])[0]; |
| 137 | + } |
| 138 | + |
| 139 | + /** |
| 140 | + * Get all the components of the given name. |
| 141 | + */ |
| 142 | + public get(name: string): Component[] { |
| 143 | + return this.components[name] || []; |
| 144 | + } |
| 145 | + |
| 146 | + /** |
| 147 | + * Get the first component, of the given name, that's assigned to the given element. |
| 148 | + */ |
| 149 | + public firstOnElement(element: HTMLElement, name: string): Component|null { |
| 150 | + const elComponents = this.elementComponentMap.get(element) || {}; |
| 151 | + return elComponents[name] || null; |
| 152 | + } |
| 153 | +} |
0 commit comments