@ng-dynamic-forms/core
Version:
A rapid form development library for Angular
93 lines • 17.1 kB
JavaScript
import { Inject, Injectable, Optional } from "@angular/core";
import { UntypedFormControl } from "@angular/forms";
import { AND_OPERATOR, DYNAMIC_MATCHERS, OR_OPERATOR } from "./dynamic-form-relation-matchers";
import { distinctUntilChanged, startWith } from "rxjs/operators";
import { merge } from "rxjs";
import { isString } from "../utils/core.utils";
import * as i0 from "@angular/core";
export class DynamicFormRelationService {
constructor(MATCHERS, injector) {
this.MATCHERS = MATCHERS;
this.injector = injector;
}
getRelatedFormControls(model, group) {
const conditionReducer = (controls, condition) => {
const path = condition.rootPath ?? condition.id;
if (isString(path) && !controls.hasOwnProperty(path)) {
const control = condition.rootPath ? group.root.get(condition.rootPath) : group.get(condition.id);
control instanceof UntypedFormControl ?
controls[path] = control : console.warn(`No related form control with id ${condition.id} could be found`);
}
return controls;
};
const relationReducer = (controls, relation) => relation.when.reduce(conditionReducer, controls);
return model.relations.reduce(relationReducer, {});
}
findRelationByMatcher(relations, matcher) {
return relations.find(relation => [matcher.match, matcher.opposingMatch].includes(relation.match));
}
matchesCondition(relation, relatedFormControls, matcher) {
const operator = relation.operator ?? OR_OPERATOR;
return relation.when.reduce((hasMatched, condition, index) => {
const path = condition.rootPath ?? condition.id;
let relatedFormControl;
for (const [key, control] of Object.entries(relatedFormControls)) {
if (key === path) {
relatedFormControl = control;
break;
}
}
if (relatedFormControl && relation.match === matcher.match) {
if (index > 0 && operator === AND_OPERATOR && !hasMatched) {
return false;
}
if (index > 0 && operator === OR_OPERATOR && hasMatched) {
return true;
}
return condition.value === relatedFormControl.value || condition.status === relatedFormControl.status;
}
if (relatedFormControl && relation.match === matcher.opposingMatch) {
if (index > 0 && operator === AND_OPERATOR && hasMatched) {
return true;
}
if (index > 0 && operator === OR_OPERATOR && !hasMatched) {
return false;
}
return !(condition.value === relatedFormControl.value || condition.status === relatedFormControl.status);
}
return false;
}, false);
}
subscribeRelations(model, group, control) {
const relatedFormControls = this.getRelatedFormControls(model, group);
const subscriptions = [];
Object.values(relatedFormControls).forEach(relatedControl => {
const valueChanges = relatedControl.valueChanges.pipe(startWith(relatedControl.value), distinctUntilChanged());
const statusChanges = relatedControl.statusChanges.pipe(startWith(relatedControl.status), distinctUntilChanged());
subscriptions.push(merge(valueChanges, statusChanges).subscribe(() => {
this.MATCHERS.forEach(matcher => {
const relation = this.findRelationByMatcher(model.relations, matcher);
if (relation !== undefined) {
const hasMatch = this.matchesCondition(relation, relatedFormControls, matcher);
matcher.onChange(hasMatch, model, control, this.injector);
}
});
}));
});
return subscriptions;
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.3", ngImport: i0, type: DynamicFormRelationService, deps: [{ token: DYNAMIC_MATCHERS, optional: true }, { token: i0.Injector }], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.1.3", ngImport: i0, type: DynamicFormRelationService, providedIn: "root" }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.3", ngImport: i0, type: DynamicFormRelationService, decorators: [{
type: Injectable,
args: [{
providedIn: "root"
}]
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Optional
}, {
type: Inject,
args: [DYNAMIC_MATCHERS]
}] }, { type: i0.Injector }]; } });
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{ Inject, Injectable, Injector, Optional } from \"@angular/core\";\nimport { UntypedFormControl, UntypedFormGroup } from \"@angular/forms\";\nimport { DynamicFormControlModel } from \"../model/dynamic-form-control.model\";\nimport {\n    AND_OPERATOR,\n    DYNAMIC_MATCHERS,\n    DynamicFormControlMatcher,\n    OR_OPERATOR\n} from \"./dynamic-form-relation-matchers\";\nimport { DynamicFormControlCondition, DynamicFormControlRelation } from \"../model/misc/dynamic-form-control-relation.model\";\nimport { distinctUntilChanged, startWith } from \"rxjs/operators\";\nimport { merge, Subscription } from \"rxjs\";\nimport { isString } from \"../utils/core.utils\";\n\nexport type DynamicRelatedFormControls = { [path: string]: UntypedFormControl };\n\n@Injectable({\n    providedIn: \"root\"\n})\nexport class DynamicFormRelationService {\n\n    constructor(@Optional() @Inject(DYNAMIC_MATCHERS) private MATCHERS: DynamicFormControlMatcher[], private injector: Injector) {\n    }\n\n    getRelatedFormControls(model: DynamicFormControlModel, group: UntypedFormGroup): DynamicRelatedFormControls {\n        const conditionReducer = (controls: DynamicRelatedFormControls, condition: DynamicFormControlCondition) => {\n            const path = condition.rootPath ?? condition.id;\n\n            if (isString(path) && !controls.hasOwnProperty(path)) {\n                const control = condition.rootPath ? group.root.get(condition.rootPath) : group.get(condition.id!);\n                control instanceof UntypedFormControl ?\n                    controls[path] = control : console.warn(`No related form control with id ${condition.id} could be found`);\n            }\n\n            return controls;\n        };\n\n        const relationReducer = (controls: DynamicRelatedFormControls, relation: DynamicFormControlRelation) =>\n            relation.when.reduce(conditionReducer, controls);\n\n        return model.relations.reduce(relationReducer, {});\n    }\n\n    findRelationByMatcher(relations: DynamicFormControlRelation[],\n                          matcher: DynamicFormControlMatcher): DynamicFormControlRelation | undefined {\n        return relations.find(relation => [matcher.match, matcher.opposingMatch].includes(relation.match));\n    }\n\n    matchesCondition(relation: DynamicFormControlRelation,\n                     relatedFormControls: DynamicRelatedFormControls,\n                     matcher: DynamicFormControlMatcher): boolean {\n        const operator = relation.operator ?? OR_OPERATOR;\n\n        return relation.when.reduce<boolean>((hasMatched, condition, index) => {\n            const path = condition.rootPath ?? condition.id;\n            let relatedFormControl;\n\n            for (const [key, control] of Object.entries(relatedFormControls)) {\n                if (key === path) {\n                    relatedFormControl = control;\n                    break;\n                }\n            }\n\n            if (relatedFormControl && relation.match === matcher.match) {\n                if (index > 0 && operator === AND_OPERATOR && !hasMatched) {\n                    return false;\n                }\n\n                if (index > 0 && operator === OR_OPERATOR && hasMatched) {\n                    return true;\n                }\n\n                return condition.value === relatedFormControl.value || condition.status === relatedFormControl.status;\n            }\n\n            if (relatedFormControl && relation.match === matcher.opposingMatch) {\n                if (index > 0 && operator === AND_OPERATOR && hasMatched) {\n                    return true;\n                }\n\n                if (index > 0 && operator === OR_OPERATOR && !hasMatched) {\n                    return false;\n                }\n\n                return !(condition.value === relatedFormControl.value || condition.status === relatedFormControl.status);\n            }\n\n            return false;\n\n        }, false);\n    }\n\n    subscribeRelations(model: DynamicFormControlModel, group: UntypedFormGroup, control: UntypedFormControl): Subscription[] {\n        const relatedFormControls = this.getRelatedFormControls(model, group);\n        const subscriptions: Subscription[] = [];\n\n        Object.values(relatedFormControls).forEach(relatedControl => {\n            const valueChanges = relatedControl.valueChanges.pipe(startWith(relatedControl.value), distinctUntilChanged());\n            const statusChanges = relatedControl.statusChanges.pipe(startWith(relatedControl.status), distinctUntilChanged());\n\n            subscriptions.push(merge(valueChanges, statusChanges).subscribe(() => {\n                this.MATCHERS.forEach(matcher => {\n                    const relation = this.findRelationByMatcher(model.relations, matcher);\n\n                    if (relation !== undefined) {\n                        const hasMatch = this.matchesCondition(relation, relatedFormControls, matcher);\n                        matcher.onChange(hasMatch, model, control, this.injector);\n                    }\n                });\n            }));\n        });\n\n        return subscriptions;\n    }\n}\n"]}