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|
/**
* ============LICENSE_START========================================================================
* ONAP : ccsdk feature sdnr wt odlux
* =================================================================================================
* Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
* =================================================================================================
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
* ============LICENSE_END==========================================================================
*/
import { Token, Statement, Module, Identity, ModuleState } from "../models/yang";
import {
ViewSpecification, ViewElement, isViewElementObjectOrList, ViewElementBase,
isViewElementReference, ViewElementChoise, ViewElementBinary, ViewElementString, isViewElementString,
isViewElementNumber, ViewElementNumber, Expression, YangRange, ViewElementUnion, ViewElementRpc, isViewElementRpc, ResolveFunction, ViewElementDate
} from "../models/uiModels";
import { yangService } from "../services/yangService";
export const splitVPath = (vPath: string, vPathParser: RegExp): RegExpMatchArray[] => {
const pathParts: RegExpMatchArray[] = [];
let partMatch: RegExpExecArray | null;
if (vPath) do {
partMatch = vPathParser.exec(vPath);
if (partMatch) {
pathParts.push(partMatch);
}
} while (partMatch)
return pathParts;
}
class YangLexer {
private pos: number = 0;
private buf: string = "";
constructor(input: string) {
this.pos = 0;
this.buf = input;
}
private _optable: { [key: string]: string } = {
';': 'SEMI',
'{': 'L_BRACE',
'}': 'R_BRACE',
};
private _isNewline(char: string): boolean {
return char === '\r' || char === '\n';
}
private _isWhitespace(char: string): boolean {
return char === ' ' || char === '\t' || this._isNewline(char);
}
private _isDigit(char: string): boolean {
return char >= '0' && char <= '9';
}
private _isAlpha(char: string): boolean {
return (char >= 'a' && char <= 'z') ||
(char >= 'A' && char <= 'Z')
}
private _isAlphanum(char: string): boolean {
return this._isAlpha(char) || this._isDigit(char) ||
char === '_' || char === '-' || char === '.';
}
private _skipNontokens() {
while (this.pos < this.buf.length) {
const char = this.buf.charAt(this.pos);
if (this._isWhitespace(char)) {
this.pos++;
} else {
break;
}
}
}
private _processString(terminator: string | null): Token {
// this.pos points at the opening quote. Find the ending quote.
let end_index = this.pos + 1;
while (end_index < this.buf.length) {
const char = this.buf.charAt(end_index);
if (char === "\\") {
end_index += 2;
continue;
};
if (terminator === null && (this._isWhitespace(char) || this._optable[char] !== undefined) || char === terminator) {
break;
}
end_index++;
}
if (end_index >= this.buf.length) {
throw Error('Unterminated quote at ' + this.pos);
} else {
const start = this.pos + (terminator ? 1 : 0);
const end = end_index;
const tok = {
name: 'STRING',
value: this.buf.substring(start, end),
start,
end
};
this.pos = terminator ? end + 1 : end;
return tok;
}
}
private _processIdentifier(): Token {
let endpos = this.pos + 1;
while (endpos < this.buf.length && this._isAlphanum(this.buf.charAt(endpos))) {
++endpos;
}
let name = 'IDENTIFIER'
if (this.buf.charAt(endpos) === ":") {
name = 'IDENTIFIERREF';
++endpos;
while (endpos < this.buf.length && this._isAlphanum(this.buf.charAt(endpos))) {
++endpos;
}
}
const tok = {
name: name,
value: this.buf.substring(this.pos, endpos),
start: this.pos,
end: endpos
};
this.pos = endpos;
return tok;
}
private _processNumber(): Token {
let endpos = this.pos + 1;
while (endpos < this.buf.length &&
this._isDigit(this.buf.charAt(endpos))) {
endpos++;
}
const tok = {
name: 'NUMBER',
value: this.buf.substring(this.pos, endpos),
start: this.pos,
end: endpos
};
this.pos = endpos;
return tok;
}
private _processLineComment() {
var endpos = this.pos + 2;
// Skip until the end of the line
while (endpos < this.buf.length && !this._isNewline(this.buf.charAt(endpos))) {
endpos++;
}
this.pos = endpos + 1;
}
private _processBlockComment() {
var endpos = this.pos + 2;
// Skip until the end of the line
while (endpos < this.buf.length && !((this.buf.charAt(endpos) === "/" && this.buf.charAt(endpos - 1) === "*"))) {
endpos++;
}
this.pos = endpos + 1;
}
public tokenize(): Token[] {
const result: Token[] = [];
this._skipNontokens();
while (this.pos < this.buf.length) {
const char = this.buf.charAt(this.pos);
const op = this._optable[char];
if (op !== undefined) {
result.push({ name: op, value: char, start: this.pos, end: ++this.pos });
} else if (this._isAlpha(char)) {
result.push(this._processIdentifier());
this._skipNontokens();
const peekChar = this.buf.charAt(this.pos);
if (this._optable[peekChar] === undefined) {
result.push((peekChar !== "'" && peekChar !== '"')
? this._processString(null)
: this._processString(peekChar));
}
} else if (char === '/' && this.buf.charAt(this.pos + 1) === "/") {
this._processLineComment();
} else if (char === '/' && this.buf.charAt(this.pos + 1) === "*") {
this._processBlockComment();
} else {
throw Error('Token error at ' + this.pos + " " + this.buf[this.pos]);
}
this._skipNontokens();
}
return result;
}
public tokenize2(): Statement {
let stack: Statement[] = [{ key: "ROOT", sub: [] }];
let current: Statement | null = null;
this._skipNontokens();
while (this.pos < this.buf.length) {
const char = this.buf.charAt(this.pos);
const op = this._optable[char];
if (op !== undefined) {
if (op === "L_BRACE") {
current && stack.unshift(current);
current = null;
} else if (op === "R_BRACE") {
current = stack.shift() || null;
}
this.pos++;
} else if (this._isAlpha(char) || char === "_") {
const key = this._processIdentifier().value;
this._skipNontokens();
let peekChar = this.buf.charAt(this.pos);
let arg = undefined;
if (this._optable[peekChar] === undefined) {
arg = (peekChar === '"' || peekChar === "'")
? this._processString(peekChar).value
: this._processString(null).value;
}
do {
this._skipNontokens();
peekChar = this.buf.charAt(this.pos);
if (peekChar !== "+") break;
this.pos++;
this._skipNontokens();
peekChar = this.buf.charAt(this.pos);
arg += (peekChar === '"' || peekChar === "'")
? this._processString(peekChar).value
: this._processString(null).value;
} while (true);
current = { key, arg, sub: [] };
stack[0].sub!.push(current);
} else if (char === '/' && this.buf.charAt(this.pos + 1) === "/") {
this._processLineComment();
} else if (char === '/' && this.buf.charAt(this.pos + 1) === "*") {
this._processBlockComment();
} else {
throw Error('Token error at ' + this.pos + " " + this.buf.slice(this.pos - 10, this.pos + 10));
}
this._skipNontokens();
}
if (stack[0].key !== "ROOT" || !stack[0].sub![0]) {
throw new Error("Internal Perser Error");
}
return stack[0].sub![0];
}
}
export class YangParser {
private _groupingsToResolve: ViewSpecification[] = [];
private _identityToResolve: (() => void)[] = [];
private _unionsToResolve: (() => void)[] = [];
private _modulesToResolve: (() => void)[] = [];
private _modules: { [name: string]: Module } = {};
private _views: ViewSpecification[] = [{
id: "0",
name: "root",
language: "en-US",
canEdit: false,
config: true,
parentView: "0",
title: "root",
elements: {},
}];
public static ResolveStack = Symbol("ResolveStack");
constructor(private _unavailableCapabilities: { failureReason: string; capability: string; }[] = [], private _importOnlyModules: { name: string; revision: string; }[] = [], private nodeId: string) {
}
public get modules() {
return this._modules;
}
public get views() {
return this._views;
}
public async addCapability(capability: string, version?: string, parentImportOnlyModule?: boolean) {
// do not add twice
if (this._modules[capability]) {
// console.warn(`Skipped capability: ${capability} since already contained.` );
return;
}
// // do not add unavailable capabilities
// if (this._unavailableCapabilities.some(c => c.capability === capability)) {
// // console.warn(`Skipped capability: ${capability} since it is marked as unavailable.` );
// return;
// }
const data = await yangService.getCapability(capability, this.nodeId, version);
if (!data) {
throw new Error(`Could not load yang file for ${capability}.`);
}
const rootStatement = new YangLexer(data).tokenize2();
if (rootStatement.key !== "module") {
throw new Error(`Root element of ${capability} is not a module.`);
}
if (rootStatement.arg !== capability) {
throw new Error(`Root element capability ${rootStatement.arg} does not requested ${capability}.`);
}
const isUnavailable = this._unavailableCapabilities.some(c => c.capability === capability);
const isImportOnly = parentImportOnlyModule === true || this._importOnlyModules.some(c => c.name === capability);
const module = this._modules[capability] = {
name: rootStatement.arg,
revisions: {},
imports: {},
features: {},
identities: {},
augments: {},
groupings: {},
typedefs: {},
views: {},
elements: {},
state: isUnavailable
? ModuleState.unavailable
: isImportOnly
? ModuleState.importOnly
: ModuleState.stable,
};
await this.handleModule(module, rootStatement, capability);
}
private async handleModule(module: Module, rootStatement: Statement, capability: string) {
// extract namespace && prefix
module.namespace = this.extractValue(rootStatement, "namespace");
module.prefix = this.extractValue(rootStatement, "prefix");
if (module.prefix) {
module.imports[module.prefix] = capability;
}
// extract revisions
const revisions = this.extractNodes(rootStatement, "revision");
module.revisions = {
...module.revisions,
...revisions.reduce<{ [version: string]: {} }>((acc, version) => {
if (!version.arg) {
throw new Error(`Module [${module.name}] has a version w/o version number.`);
}
const description = this.extractValue(version, "description");
const reference = this.extractValue(version, "reference");
acc[version.arg] = {
description,
reference,
};
return acc;
}, {})
};
// extract features
const features = this.extractNodes(rootStatement, "feature");
module.features = {
...module.features,
...features.reduce<{ [version: string]: {} }>((acc, feature) => {
if (!feature.arg) {
throw new Error(`Module [${module.name}] has a feature w/o name.`);
}
const description = this.extractValue(feature, "description");
acc[feature.arg] = {
description,
};
return acc;
}, {})
};
// extract imports
const imports = this.extractNodes(rootStatement, "import");
module.imports = {
...module.imports,
...imports.reduce<{ [key: string]: string }>((acc, imp) => {
const prefix = imp.sub && imp.sub.filter(s => s.key === "prefix");
if (!imp.arg) {
throw new Error(`Module [${module.name}] has an import with neither name nor prefix.`);
}
acc[prefix && prefix.length === 1 && prefix[0].arg || imp.arg] = imp.arg;
return acc;
}, {})
};
// import all required files and set module state
if (imports) for (let ind = 0; ind < imports.length; ++ind) {
const moduleName = imports[ind].arg!;
//TODO: Fix imports getting loaded without revision
await this.addCapability(moduleName, undefined, module.state === ModuleState.importOnly);
const importedModule = this._modules[imports[ind].arg!];
if (importedModule && importedModule.state > ModuleState.stable) {
module.state = Math.max(module.state, ModuleState.instable);
}
}
this.extractTypeDefinitions(rootStatement, module, "");
this.extractIdentities(rootStatement, 0, module, "");
const groupings = this.extractGroupings(rootStatement, 0, module, "");
this._views.push(...groupings);
const augments = this.extractAugments(rootStatement, 0, module, "");
this._views.push(...augments);
// the default for config on module level is config = true;
const [currentView, subViews] = this.extractSubViews(rootStatement, 0, module, "");
this._views.push(currentView, ...subViews);
// create the root elements for this module
module.elements = currentView.elements;
this._modulesToResolve.push(() => {
Object.keys(module.elements).forEach(key => {
const viewElement = module.elements[key];
if (!(isViewElementObjectOrList(viewElement) || isViewElementRpc(viewElement))) {
console.error(new Error(`Module: [${module}]. Only Object, List or RPC are allowed on root level.`));
}
if (isViewElementObjectOrList(viewElement)) {
const viewIdIndex = Number(viewElement.viewId);
module.views[key] = this._views[viewIdIndex];
}
// add only the UI View if the module is available
if (module.state === ModuleState.stable || module.state === ModuleState.instable) this._views[0].elements[key] = module.elements[key];
});
});
return module;
}
public postProcess() {
// execute all post processes like resolving in proper order
this._unionsToResolve.forEach(cb => {
try { cb(); } catch (error) {
console.warn(error.message);
}
});
// process all groupings
this._groupingsToResolve.filter(vs => vs.uses && vs.uses[ResolveFunction]).forEach(vs => {
try { vs.uses![ResolveFunction] !== undefined && vs.uses![ResolveFunction]!("|"); } catch (error) {
console.warn(`Error resolving: [${vs.name}] [${error.message}]`);
}
});
// process all augmentations / sort by namespace changes to ensure proper order
Object.keys(this.modules).forEach(modKey => {
const module = this.modules[modKey];
const augmentKeysWithCounter = Object.keys(module.augments).map((key) => {
const pathParts = splitVPath(key, /(?:(?:([^\/\:]+):)?([^\/]+))/g); // 1 = opt: namespace / 2 = property
let nameSpaceChangeCounter = 0;
let currentNS = module.name; // init namespace
pathParts.forEach(([ns, _])=> {
if (ns === currentNS){
currentNS = ns;
nameSpaceChangeCounter++;
}
});
return {
key,
nameSpaceChangeCounter,
}
});
const augmentKeys = augmentKeysWithCounter
.sort((a,b) => a.nameSpaceChangeCounter > b.nameSpaceChangeCounter ? 1 : a.nameSpaceChangeCounter === b.nameSpaceChangeCounter ? 0 : -1 )
.map((a) => a.key);
augmentKeys.forEach(augKey => {
const augments = module.augments[augKey];
const viewSpec = this.resolveView(augKey);
if (!viewSpec) console.warn(`Could not find view to augment [${augKey}] in [${module.name}].`);
if (augments && viewSpec) {
augments.forEach(augment => Object.keys(augment.elements).forEach(key => {
const elm = augment.elements[key];
viewSpec.elements[key] = {
...augment.elements[key],
when: elm.when ? `(${augment.when}) and (${elm.when})` : augment.when,
ifFeature: elm.ifFeature ? `(${augment.ifFeature}) and (${elm.ifFeature})` : augment.ifFeature,
};
}));
}
});
});
// process Identities
const traverseIdentity = (identities: Identity[]) => {
const result: Identity[] = [];
for (let identity of identities) {
if (identity.children && identity.children.length > 0) {
result.push(...traverseIdentity(identity.children));
} else {
result.push(identity);
}
}
return result;
}
const baseIdentities: Identity[] = [];
Object.keys(this.modules).forEach(modKey => {
const module = this.modules[modKey];
Object.keys(module.identities).forEach(idKey => {
const identity = module.identities[idKey];
if (identity.base != null) {
const base = this.resolveIdentity(identity.base, module);
base.children?.push(identity);
} else {
baseIdentities.push(identity);
}
});
});
baseIdentities.forEach(identity => {
identity.values = identity.children && traverseIdentity(identity.children) || [];
});
this._identityToResolve.forEach(cb => {
try { cb(); } catch (error) {
console.warn(error.message);
}
});
this._modulesToResolve.forEach(cb => {
try { cb(); } catch (error) {
console.warn(error.message);
}
});
// resolve readOnly
const resolveReadOnly = (view: ViewSpecification, parentConfig: boolean) => {
// update view config
view.config = view.config && parentConfig;
Object.keys(view.elements).forEach((key) => {
const elm = view.elements[key];
// update element config
elm.config = elm.config && view.config;
// update all sub-elements of objects
if (elm.uiType === "object") {
resolveReadOnly(this.views[+elm.viewId], elm.config);
}
})
}
const dump = resolveReadOnly(this.views[0], true);
};
private _nextId = 1;
private get nextId() {
return this._nextId++;
}
private extractNodes(statement: Statement, key: string): Statement[] {
return statement.sub && statement.sub.filter(s => s.key === key) || [];
}
private extractValue(statement: Statement, key: string): string | undefined;
private extractValue(statement: Statement, key: string, parser: RegExp): RegExpExecArray | undefined;
private extractValue(statement: Statement, key: string, parser?: RegExp): string | RegExpExecArray | undefined {
const typeNodes = this.extractNodes(statement, key);
const rawValue = typeNodes.length > 0 && typeNodes[0].arg || undefined;
return parser
? rawValue && parser.exec(rawValue) || undefined
: rawValue;
}
private extractTypeDefinitions(statement: Statement, module: Module, currentPath: string): void {
const typedefs = this.extractNodes(statement, "typedef");
typedefs && typedefs.forEach(def => {
if (!def.arg) {
throw new Error(`Module: [${module.name}]. Found typefed without name.`);
}
module.typedefs[def.arg] = this.getViewElement(def, module, 0, currentPath, false);
});
}
/** Handles groupings like named Container */
private extractGroupings(statement: Statement, parentId: number, module: Module, currentPath: string): ViewSpecification[] {
const subViews: ViewSpecification[] = [];
const groupings = this.extractNodes(statement, "grouping");
if (groupings && groupings.length > 0) {
subViews.push(...groupings.reduce<ViewSpecification[]>((acc, cur) => {
if (!cur.arg) {
throw new Error(`Module: [${module.name}][${currentPath}]. Found grouping without name.`);
}
const grouping = cur.arg;
// the default for config on module level is config = true;
const [currentView, subViews] = this.extractSubViews(cur, /* parentId */ -1, module, currentPath);
grouping && (module.groupings[grouping] = currentView);
acc.push(currentView, ...subViews);
return acc;
}, []));
}
return subViews;
}
/** Handles augments also like named container */
private extractAugments(statement: Statement, parentId: number, module: Module, currentPath: string): ViewSpecification[] {
const subViews: ViewSpecification[] = [];
const augments = this.extractNodes(statement, "augment");
if (augments && augments.length > 0) {
subViews.push(...augments.reduce<ViewSpecification[]>((acc, cur) => {
if (!cur.arg) {
throw new Error(`Module: [${module.name}][${currentPath}]. Found augment without path.`);
}
const augment = this.resolveReferencePath(cur.arg, module);
// the default for config on module level is config = true;
const [currentView, subViews] = this.extractSubViews(cur, parentId, module, currentPath);
if (augment) {
module.augments[augment] = module.augments[augment] || [];
module.augments[augment].push(currentView);
}
acc.push(currentView, ...subViews);
return acc;
}, []));
}
return subViews;
}
/** Handles identities */
private extractIdentities(statement: Statement, parentId: number, module: Module, currentPath: string) {
const identities = this.extractNodes(statement, "identity");
module.identities = identities.reduce<{ [name: string]: Identity }>((acc, cur) => {
if (!cur.arg) {
throw new Error(`Module: [${module.name}][${currentPath}]. Found identiy without name.`);
}
acc[cur.arg] = {
id: `${module.name}:${cur.arg}`,
label: cur.arg,
base: this.extractValue(cur, "base"),
description: this.extractValue(cur, "description"),
reference: this.extractValue(cur, "reference"),
children: []
}
return acc;
}, {});
}
// Hint: use 0 as parentId for rootElements and -1 for rootGroupings.
private extractSubViews(statement: Statement, parentId: number, module: Module, currentPath: string): [ViewSpecification, ViewSpecification[]] {
// used for scoped definitions
const context: Module = {
...module,
typedefs: {
...module.typedefs
}
};
const currentId = this.nextId;
const subViews: ViewSpecification[] = [];
let elements: ViewElement[] = [];
const configValue = this.extractValue(statement, "config");
const config = configValue == null ? true : configValue.toLocaleLowerCase() !== "false";
// extract conditions
const ifFeature = this.extractValue(statement, "if-feature");
const whenCondition = this.extractValue(statement, "when");
if (whenCondition) console.warn("Found in [" + context.name + "]" + currentPath + " when: " + whenCondition);
// extract all scoped typedefs
this.extractTypeDefinitions(statement, context, currentPath);
// extract all scoped groupings
subViews.push(
...this.extractGroupings(statement, parentId, context, currentPath)
);
// extract all container
const container = this.extractNodes(statement, "container");
if (container && container.length > 0) {
subViews.push(...container.reduce<ViewSpecification[]>((acc, cur) => {
if (!cur.arg) {
throw new Error(`Module: [${context.name}]${currentPath}. Found container without name.`);
}
const [currentView, subViews] = this.extractSubViews(cur, currentId, context, `${currentPath}/${context.name}:${cur.arg}`);
elements.push({
id: parentId === 0 ? `${context.name}:${cur.arg}` : cur.arg,
label: cur.arg,
path: currentPath,
module: context.name || module.name || '',
uiType: "object",
viewId: currentView.id,
config: currentView.config,
});
acc.push(currentView, ...subViews);
return acc;
}, []));
}
// process all lists
// a list is a list of containers with the leafs contained in the list
const lists = this.extractNodes(statement, "list");
if (lists && lists.length > 0) {
subViews.push(...lists.reduce<ViewSpecification[]>((acc, cur) => {
let elmConfig = config;
if (!cur.arg) {
throw new Error(`Module: [${context.name}]${currentPath}. Found list without name.`);
}
const key = this.extractValue(cur, "key") || undefined;
if (elmConfig && !key) {
console.warn(`Module: [${context.name}]${currentPath}. Found configurable list without key. Assume config shell be false.`);
elmConfig = false;
}
const [currentView, subViews] = this.extractSubViews(cur, currentId, context, `${currentPath}/${context.name}:${cur.arg}`);
elements.push({
id: parentId === 0 ? `${context.name}:${cur.arg}` : cur.arg,
label: cur.arg,
path: currentPath,
module: context.name || module.name || '',
isList: true,
uiType: "object",
viewId: currentView.id,
key: key,
config: elmConfig && currentView.config,
});
acc.push(currentView, ...subViews);
return acc;
}, []));
}
// process all leaf-lists
// a leaf-list is a list of some type
const leafLists = this.extractNodes(statement, "leaf-list");
if (leafLists && leafLists.length > 0) {
elements.push(...leafLists.reduce<ViewElement[]>((acc, cur) => {
const element = this.getViewElement(cur, context, parentId, currentPath, true);
element && acc.push(element);
return acc;
}, []));
}
// process all leafs
// a leaf is mainly a property of an object
const leafs = this.extractNodes(statement, "leaf");
if (leafs && leafs.length > 0) {
elements.push(...leafs.reduce<ViewElement[]>((acc, cur) => {
const element = this.getViewElement(cur, context, parentId, currentPath, false);
element && acc.push(element);
return acc;
}, []));
}
const choiceStms = this.extractNodes(statement, "choice");
if (choiceStms && choiceStms.length > 0) {
elements.push(...choiceStms.reduce<ViewElementChoise[]>((accChoise, curChoise) => {
if (!curChoise.arg) {
throw new Error(`Module: [${context.name}]${currentPath}. Found choise without name.`);
}
// extract all cases like containers
const cases: { id: string, label: string, description?: string, elements: { [name: string]: ViewElement } }[] = [];
const caseStms = this.extractNodes(curChoise, "case");
if (caseStms && caseStms.length > 0) {
cases.push(...caseStms.reduce((accCase, curCase) => {
if (!curCase.arg) {
throw new Error(`Module: [${context.name}]${currentPath}/${curChoise.arg}. Found case without name.`);
}
const description = this.extractValue(curCase, "description") || undefined;
const [caseView, caseSubViews] = this.extractSubViews(curCase, parentId, context, `${currentPath}/${context.name}:${curChoise.arg}`);
subViews.push(caseView, ...caseSubViews);
const caseDef: { id: string, label: string, description?: string, elements: { [name: string]: ViewElement } } = {
id: parentId === 0 ? `${context.name}:${curCase.arg}` : curCase.arg,
label: curCase.arg,
description: description,
elements: caseView.elements
};
accCase.push(caseDef);
return accCase;
}, [] as { id: string, label: string, description?: string, elements: { [name: string]: ViewElement } }[]));
}
// extract all simple cases (one case per leaf, container, etc.)
const [choiseView, choiseSubViews] = this.extractSubViews(curChoise, parentId, context, `${currentPath}/${context.name}:${curChoise.arg}`);
subViews.push(choiseView, ...choiseSubViews);
cases.push(...Object.keys(choiseView.elements).reduce((accElm, curElm) => {
const elm = choiseView.elements[curElm];
const caseDef: { id: string, label: string, description?: string, elements: { [name: string]: ViewElement } } = {
id: elm.id,
label: elm.label,
description: elm.description,
elements: { [elm.id]: elm }
};
accElm.push(caseDef);
return accElm;
}, [] as { id: string, label: string, description?: string, elements: { [name: string]: ViewElement } }[]));
const description = this.extractValue(curChoise, "description") || undefined;
const configValue = this.extractValue(curChoise, "config");
const config = configValue == null ? true : configValue.toLocaleLowerCase() !== "false";
const mandatory = this.extractValue(curChoise, "mandatory") === "true" || false;
const element: ViewElementChoise = {
uiType: "choise",
id: parentId === 0 ? `${context.name}:${curChoise.arg}` : curChoise.arg,
label: curChoise.arg,
path: currentPath,
module: context.name || module.name || '',
config: config,
mandatory: mandatory,
description: description,
cases: cases.reduce((acc, cur) => {
acc[cur.id] = cur;
return acc;
}, {} as { [name: string]: { id: string, label: string, description?: string, elements: { [name: string]: ViewElement } } })
};
accChoise.push(element);
return accChoise;
}, []));
}
const rpcStms = this.extractNodes(statement, "rpc");
if (rpcStms && rpcStms.length > 0) {
elements.push(...rpcStms.reduce<ViewElementRpc[]>((accRpc, curRpc) => {
if (!curRpc.arg) {
throw new Error(`Module: [${context.name}]${currentPath}. Found rpc without name.`);
}
const description = this.extractValue(curRpc, "description") || undefined;
const configValue = this.extractValue(curRpc, "config");
const config = configValue == null ? true : configValue.toLocaleLowerCase() !== "false";
let inputViewId: string | undefined = undefined;
let outputViewId: string | undefined = undefined;
const input = this.extractNodes(curRpc, "input") || undefined;
const output = this.extractNodes(curRpc, "output") || undefined;
if (input && input.length > 0) {
const [inputView, inputSubViews] = this.extractSubViews(input[0], parentId, context, `${currentPath}/${context.name}:${curRpc.arg}`);
subViews.push(inputView, ...inputSubViews);
inputViewId = inputView.id;
}
if (output && output.length > 0) {
const [outputView, outputSubViews] = this.extractSubViews(output[0], parentId, context, `${currentPath}/${context.name}:${curRpc.arg}`);
subViews.push(outputView, ...outputSubViews);
outputViewId = outputView.id;
}
const element: ViewElementRpc = {
uiType: "rpc",
id: parentId === 0 ? `${context.name}:${curRpc.arg}` : curRpc.arg,
label: curRpc.arg,
path: currentPath,
module: context.name || module.name || '',
config: config,
description: description,
inputViewId: inputViewId,
outputViewId: outputViewId,
};
accRpc.push(element);
return accRpc;
}, []));
}
// if (!statement.arg) {
// throw new Error(`Module: [${context.name}]. Found statement without name.`);
// }
const viewSpec: ViewSpecification = {
id: String(currentId),
parentView: String(parentId),
ns: context.name,
name: statement.arg != null ? statement.arg : undefined,
title: statement.arg != null ? statement.arg : undefined,
language: "en-us",
canEdit: false,
config: config,
ifFeature: ifFeature,
when: whenCondition,
elements: elements.reduce<{ [name: string]: ViewElement }>((acc, cur) => {
acc[cur.id] = cur;
return acc;
}, {}),
};
// evaluate canEdit depending on all conditions
Object.defineProperty(viewSpec, "canEdit", {
get: () => {
return Object.keys(viewSpec.elements).some(key => {
const elm = viewSpec.elements[key];
return (!isViewElementObjectOrList(elm) && elm.config);
});
}
});
// merge in all uses references and resolve groupings
const usesRefs = this.extractNodes(statement, "uses");
if (usesRefs && usesRefs.length > 0) {
viewSpec.uses = (viewSpec.uses || []);
const resolveFunctions : ((parentElementPath: string)=>void)[] = [];
for (let i = 0; i < usesRefs.length; ++i) {
const groupingName = usesRefs[i].arg;
if (!groupingName) {
throw new Error(`Module: [${context.name}]. Found an uses statement without a grouping name.`);
}
viewSpec.uses.push(this.resolveReferencePath(groupingName, context));
resolveFunctions.push((parentElementPath: string) => {
const groupingViewSpec = this.resolveGrouping(groupingName, context);
if (groupingViewSpec) {
// resolve recursive
const resolveFunc = groupingViewSpec.uses && groupingViewSpec.uses[ResolveFunction];
resolveFunc && resolveFunc(parentElementPath);
Object.keys(groupingViewSpec.elements).forEach(key => {
const elm = groupingViewSpec.elements[key];
// a useRef on root level need a namespace
viewSpec.elements[parentId === 0 ? `${module.name}:${key}` : key] = {
...elm,
when: elm.when ? `(${groupingViewSpec.when}) and (${elm.when})` : groupingViewSpec.when,
ifFeature: elm.ifFeature ? `(${groupingViewSpec.ifFeature}) and (${elm.ifFeature})` : groupingViewSpec.ifFeature,
};
});
}
});
}
viewSpec.uses[ResolveFunction] = (parentElementPath: string) => {
const currentElementPath = `${parentElementPath} -> ${viewSpec.ns}:${viewSpec.name}`;
resolveFunctions.forEach(resolve => {
try {
resolve(currentElementPath);
} catch (error) {
console.error(error);
}
});
// console.log("Resolved "+currentElementPath, viewSpec);
if (viewSpec?.uses) {
viewSpec.uses[ResolveFunction] = undefined;
}
}
this._groupingsToResolve.push(viewSpec);
}
return [viewSpec, subViews];
}
// https://tools.ietf.org/html/rfc7950#section-9.3.4
private static decimalRange = [
{ min: -9223372036854775808, max: 9223372036854775807 },
{ min: -922337203685477580.8, max: 922337203685477580.7 },
{ min: -92233720368547758.08, max: 92233720368547758.07 },
{ min: -9223372036854775.808, max: 9223372036854775.807 },
{ min: -922337203685477.5808, max: 922337203685477.5807 },
{ min: -92233720368547.75808, max: 92233720368547.75807 },
{ min: -9223372036854.775808, max: 9223372036854.775807 },
{ min: -922337203685.4775808, max: 922337203685.4775807 },
{ min: -92233720368.54775808, max: 92233720368.54775807 },
{ min: -9223372036.854775808, max: 9223372036.854775807 },
{ min: -922337203.6854775808, max: 922337203.6854775807 },
{ min: -92233720.36854775808, max: 92233720.36854775807 },
{ min: -9223372.036854775808, max: 9223372.036854775807 },
{ min: -922337.2036854775808, max: 922337.2036854775807 },
{ min: -92233.72036854775808, max: 92233.72036854775807 },
{ min: -9223.372036854775808, max: 9223.372036854775807 },
{ min: -922.3372036854775808, max: 922.3372036854775807 },
{ min: -92.23372036854775808, max: 92.23372036854775807 },
{ min: -9.223372036854775808, max: 9.223372036854775807 },
];
/** Extracts the UI View from the type in the cur statement. */
private getViewElement(cur: Statement, module: Module, parentId: number, currentPath: string, isList: boolean): ViewElement {
const type = this.extractValue(cur, "type");
const defaultVal = this.extractValue(cur, "default") || undefined;
const description = this.extractValue(cur, "description") || undefined;
const configValue = this.extractValue(cur, "config");
const config = configValue == null ? true : configValue.toLocaleLowerCase() !== "false";
const extractRange = (min: number, max: number, property: string = "range"): { expression: Expression<YangRange> | undefined, min: number, max: number } => {
const ranges = this.extractValue(this.extractNodes(cur, "type")[0]!, property) || undefined;
const range = ranges ?.replace(/min/i, String(min)).replace(/max/i, String(max)).split("|").map(r => {
let minValue: number;
let maxValue: number;
if (r.indexOf('..') > -1) {
const [minStr, maxStr] = r.split('..');
minValue = Number(minStr);
maxValue = Number(maxStr);
} else if (!isNaN(maxValue = Number(r && r.trim() )) ) {
minValue = maxValue;
} else {
minValue = min,
maxValue = max;
}
if (minValue > min) min = minValue;
if (maxValue < max) max = maxValue;
return {
min: minValue,
max: maxValue
};
});
return {
min: min,
max: max,
expression: range && range.length === 1
? range[0]
: range && range.length > 1
? { operation: "OR", arguments: range }
: undefined
}
};
const extractPattern = (): Expression<RegExp> | undefined => {
const pattern = this.extractNodes(this.extractNodes(cur, "type")[0]!, "pattern").map(p => p.arg!).filter(p => !!p).map(p => `^${p.replace(/(?:\\(.))/g, '$1')}$`);
return pattern && pattern.length == 1
? new RegExp(pattern[0])
: pattern && pattern.length > 1
? { operation: "AND", arguments: pattern.map(p => new RegExp(p)) }
: undefined;
}
const mandatory = this.extractValue(cur, "mandatory") === "true" || false;
if (!cur.arg) {
throw new Error(`Module: [${module.name}]. Found element without name.`);
}
if (!type) {
throw new Error(`Module: [${module.name}].[${cur.arg}]. Found element without type.`);
}
const element: ViewElementBase = {
id: parentId === 0 ? `${module.name}:${cur.arg}` : cur.arg,
label: cur.arg,
path: currentPath,
module: module.name || "",
config: config,
mandatory: mandatory,
isList: isList,
default: defaultVal,
description: description
};
if (type === "string") {
const length = extractRange(0, +18446744073709551615, "length");
return ({
...element,
uiType: "string",
length: length.expression,
pattern: extractPattern(),
});
} else if (type === "boolean") {
return ({
...element,
uiType: "boolean"
});
} else if (type === "uint8") {
const range = extractRange(0, +255);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "uint16") {
const range = extractRange(0, +65535);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "uint32") {
const range = extractRange(0, +4294967295);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "uint64") {
const range = extractRange(0, +18446744073709551615);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "int8") {
const range = extractRange(-128, +127);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "int16") {
const range = extractRange(-32768, +32767);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "int32") {
const range = extractRange(-2147483648, +2147483647);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "int64") {
const range = extractRange(-9223372036854775808, +9223372036854775807);
return ({
...element,
uiType: "number",
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "decimal64") {
// decimalRange
const fDigits = Number(this.extractValue(this.extractNodes(cur, "type")[0]!, "fraction-digits")) || -1;
if (fDigits === -1) {
throw new Error(`Module: [${module.name}][${currentPath}][${cur.arg}]. Found decimal64 with invalid fraction-digits.`);
}
const range = extractRange(YangParser.decimalRange[fDigits].min, YangParser.decimalRange[fDigits].max);
return ({
...element,
uiType: "number",
fDigits: fDigits,
range: range.expression,
min: range.min,
max: range.max,
units: this.extractValue(cur, "units") || undefined,
format: this.extractValue(cur, "format") || undefined,
});
} else if (type === "enumeration") {
const typeNode = this.extractNodes(cur, "type")[0]!;
const enumNodes = this.extractNodes(typeNode, "enum");
return ({
...element,
uiType: "selection",
options: enumNodes.reduce<{ key: string; value: string; description?: string }[]>((acc, enumNode) => {
if (!enumNode.arg) {
throw new Error(`Module: [${module.name}][${currentPath}][${cur.arg}]. Found option without name.`);
}
const ifClause = this.extractValue(enumNode, "if-feature");
const value = this.extractValue(enumNode, "value");
const enumOption = {
key: enumNode.arg,
value: value != null ? value : enumNode.arg,
description: this.extractValue(enumNode, "description") || undefined
};
// todo: ❗ handle the if clause ⚡
acc.push(enumOption);
return acc;
}, [])
});
} else if (type === "leafref") {
const typeNode = this.extractNodes(cur, "type")[0]!;
const vPath = this.extractValue(typeNode, "path");
if (!vPath) {
throw new Error(`Module: [${module.name}][${currentPath}][${cur.arg}]. Found leafref without path.`);
}
const refPath = this.resolveReferencePath(vPath, module);
const resolve = this.resolveReference.bind(this);
const res: ViewElement = {
...element,
uiType: "reference",
referencePath: refPath,
ref(this: ViewElement, currentPath: string) {
const elementPath = `${currentPath}/${cur.arg}`;
const result = resolve(refPath, elementPath);
if (!result) return undefined;
const [resolvedElement, resolvedPath] = result;
return resolvedElement && [{
...resolvedElement,
id: this.id,
label: this.label,
config: this.config,
mandatory: this.mandatory,
isList: this.isList,
default: this.default,
description: this.description,
} as ViewElement , resolvedPath] || undefined;
}
};
return res;
} else if (type === "identityref") {
const typeNode = this.extractNodes(cur, "type")[0]!;
const base = this.extractValue(typeNode, "base");
if (!base) {
throw new Error(`Module: [${module.name}][${currentPath}][${cur.arg}]. Found identityref without base.`);
}
const res: ViewElement = {
...element,
uiType: "selection",
options: []
};
this._identityToResolve.push(() => {
const identity: Identity = this.resolveIdentity(base, module);
if (!identity) {
throw new Error(`Module: [${module.name}][${currentPath}][${cur.arg}]. Could not resolve identity [${base}].`);
}
if (!identity.values || identity.values.length === 0) {
throw new Error(`Identity: [${base}] has no values.`);
}
res.options = identity.values.map(val => ({
key: val.id,
value: val.id,
description: val.description
}));
});
return res;
} else if (type === "empty") {
// todo: ❗ handle empty ⚡
/* 9.11. The empty Built-In Type
The empty built-in type represents a leaf that does not have any
value, it conveys information by its presence or absence. */
return {
...element,
uiType: "empty",
};
} else if (type === "union") {
// todo: ❗ handle union ⚡
/* 9.12. The union Built-In Type */
const typeNode = this.extractNodes(cur, "type")[0]!;
const typeNodes = this.extractNodes(typeNode, "type");
const resultingElement = {
...element,
uiType: "union",
elements: []
} as ViewElementUnion;
const resolveUnion = () => {
resultingElement.elements.push(...typeNodes.map(node => {
const stm: Statement = {
...cur,
sub: [
...(cur.sub ?.filter(s => s.key !== "type") || []),
node
]
};
return {
...this.getViewElement(stm, module, parentId, currentPath, isList),
id: node.arg!
};
}));
};
this._unionsToResolve.push(resolveUnion);
return resultingElement;
} else if (type === "bits") {
const typeNode = this.extractNodes(cur, "type")[0]!;
const bitNodes = this.extractNodes(typeNode, "bit");
return {
...element,
uiType: "bits",
flags: bitNodes.reduce<{ [name: string]: number | undefined; }>((acc, bitNode) => {
if (!bitNode.arg) {
throw new Error(`Module: [${module.name}][${currentPath}][${cur.arg}]. Found bit without name.`);
}
const ifClause = this.extractValue(bitNode, "if-feature");
const pos = Number(this.extractValue(bitNode, "position"));
acc[bitNode.arg] = pos === pos ? pos : undefined;
return acc;
}, {})
};
} else if (type === "binary") {
return {
...element,
uiType: "binary",
length: extractRange(0, +18446744073709551615, "length"),
};
} else if (type === "instance-identifier") {
// https://tools.ietf.org/html/rfc7950#page-168
return {
...element,
uiType: "string",
length: extractRange(0, +18446744073709551615, "length"),
};
} else {
// not a build in type, need to resolve type
let typeRef = this.resolveType(type, module);
if (typeRef == null) console.error(new Error(`Could not resolve type ${type} in [${module.name}][${currentPath}].`));
if (isViewElementString(typeRef)) {
typeRef = this.resolveStringType(typeRef, extractPattern(), extractRange(0, +18446744073709551615));
} else if (isViewElementNumber(typeRef)) {
typeRef = this.resolveNumberType(typeRef, extractRange(typeRef.min, typeRef.max));
}
// spoof date type here from special string type
if ((type === 'date-and-time' || type.endsWith(':date-and-time') ) && typeRef.module === "ietf-yang-types") {
return {
...typeRef,
...element,
description: description,
uiType: "date",
};
}
return ({
...typeRef,
...element,
description: description,
}) as ViewElement;
}
}
private resolveStringType(parentElement: ViewElementString, pattern: Expression<RegExp> | undefined, length: { expression: Expression<YangRange> | undefined, min: number, max: number }) {
return {
...parentElement,
pattern: pattern != null && parentElement.pattern
? { operation: "AND", arguments: [pattern, parentElement.pattern] }
: parentElement.pattern
? parentElement.pattern
: pattern,
length: length.expression != null && parentElement.length
? { operation: "AND", arguments: [length.expression, parentElement.length] }
: parentElement.length
? parentElement.length
: length ?.expression,
} as ViewElementString;
}
private resolveNumberType(parentElement: ViewElementNumber, range: { expression: Expression<YangRange> | undefined, min: number, max: number }) {
return {
...parentElement,
range: range.expression != null && parentElement.range
? { operation: "AND", arguments: [range.expression, parentElement.range] }
: parentElement.range
? parentElement.range
: range,
min: range.min,
max: range.max,
} as ViewElementNumber;
}
private resolveReferencePath(vPath: string, module: Module) {
const vPathParser = /(?:(?:([^\/\:]+):)?([^\/]+))/g // 1 = opt: namespace / 2 = property
return vPath.replace(vPathParser, (_, ns, property) => {
const nameSpace = ns && module.imports[ns] || module.name;
return `${nameSpace}:${property}`;
});
}
private resolveReference(vPath: string, currentPath: string) {
const vPathParser = /(?:(?:([^\/\[\]\:]+):)?([^\/\[\]]+)(\[[^\]]+\])?)/g // 1 = opt: namespace / 2 = property / 3 = opt: indexPath
let element: ViewElement | null = null;
let moduleName = "";
const vPathParts = splitVPath(vPath, vPathParser).map(p => ({ ns: p[1], property: p[2], ind: p[3] }));
const resultPathParts = !vPath.startsWith("/")
? splitVPath(currentPath, vPathParser).map(p => { moduleName = p[1] || moduleName ; return { ns: moduleName, property: p[2], ind: p[3] } })
: [];
for (let i = 0; i < vPathParts.length; ++i) {
const vPathPart = vPathParts[i];
if (vPathPart.property === "..") {
resultPathParts.pop();
} else if (vPathPart.property !== ".") {
resultPathParts.push(vPathPart);
}
}
// resolve element by path
for (let j = 0; j < resultPathParts.length; ++j) {
const pathPart = resultPathParts[j];
if (j === 0) {
moduleName = pathPart.ns;
const rootModule = this._modules[moduleName];
if (!rootModule) throw new Error("Could not resolve module [" + moduleName + "].\r\n" + vPath);
element = rootModule.elements[`${pathPart.ns}:${pathPart.property}`];
} else if (element && isViewElementObjectOrList(element)) {
const view: ViewSpecification = this._views[+element.viewId];
if (moduleName !== pathPart.ns) {
moduleName = pathPart.ns;
}
element = view.elements[pathPart.property] || view.elements[`${moduleName}:${pathPart.property}`];
} else {
throw new Error("Could not resolve reference.\r\n" + vPath);
}
if (!element) throw new Error("Could not resolve path [" + pathPart.property + "] in [" + currentPath + "] \r\n" + vPath);
}
moduleName = ""; // create the vPath for the resolved element, do not add the element itself this will be done later in the res(...) function
return [element, resultPathParts.slice(0,-1).map(p => `${moduleName !== p.ns ? `${moduleName=p.ns}:` : ""}${p.property}${p.ind || ''}`).join("/")];
}
private resolveView(vPath: string) {
const vPathParser = /(?:(?:([^\/\[\]\:]+):)?([^\/\[\]]+)(\[[^\]]+\])?)/g // 1 = opt: namespace / 2 = property / 3 = opt: indexPath
let element: ViewElement | null = null;
let partMatch: RegExpExecArray | null;
let view: ViewSpecification | null = null;
let moduleName = "";
if (vPath) do {
partMatch = vPathParser.exec(vPath);
if (partMatch) {
if (element === null) {
moduleName = partMatch[1]!;
const rootModule = this._modules[moduleName];
if (!rootModule) return null;
element = rootModule.elements[`${moduleName}:${partMatch[2]!}`];
} else if (isViewElementObjectOrList(element)) {
view = this._views[+element.viewId];
if (moduleName !== partMatch[1]) {
moduleName = partMatch[1];
element = view.elements[`${moduleName}:${partMatch[2]}`];
} else {
element = view.elements[partMatch[2]];
}
} else {
return null;
}
if (!element) return null;
}
} while (partMatch)
return element && isViewElementObjectOrList(element) && this._views[+element.viewId] || null;
}
private resolveType(type: string, module: Module) {
const collonInd = type.indexOf(":");
const preFix = collonInd > -1 ? type.slice(0, collonInd) : "";
const typeName = collonInd > -1 ? type.slice(collonInd + 1) : type;
const res = preFix
? this._modules[module.imports[preFix]].typedefs[typeName]
: module.typedefs[typeName];
return res;
}
private resolveGrouping(grouping: string, module: Module) {
const collonInd = grouping.indexOf(":");
const preFix = collonInd > -1 ? grouping.slice(0, collonInd) : "";
const groupingName = collonInd > -1 ? grouping.slice(collonInd + 1) : grouping;
return preFix
? this._modules[module.imports[preFix]].groupings[groupingName]
: module.groupings[groupingName];
}
private resolveIdentity(identity: string, module: Module) {
const collonInd = identity.indexOf(":");
const preFix = collonInd > -1 ? identity.slice(0, collonInd) : "";
const identityName = collonInd > -1 ? identity.slice(collonInd + 1) : identity;
return preFix
? this._modules[module.imports[preFix]].identities[identityName]
: module.identities[identityName];
}
}
|