rename File and getDesc

src/content/file.ts

@@ -8,9 +8,9 @@ import {extname} from 'path';
  */
 export interface ContentFile{
     getHash():Promise<string>;
+    getDesc():Promise<object|null>;
     readonly path: string;
     readonly type: string;
-    desc: object|undefined;
 }
 type ContentFileConstructor =  (new (path:string,desc?:object) => ContentFile)&{content_type:string};
 export const createDefaultClass = (type:string):ContentFileConstructor=>{
@@ -19,10 +19,11 @@ export const createDefaultClass = (type:string):ContentFileConstructor=>{
         type = type;
         static content_type = type;
 
-        desc: object|undefined;
-        constructor(path:string,desc?:object){
+        constructor(path:string,option?:object){
             this.path = path;
-            this.desc = desc;
+        }
+        async getDesc(): Promise<object|null> {
+            return null;
         }
         async getHash():Promise<string>{
             const stat = await promises.stat(this.path);
@@ -42,15 +43,15 @@ export function registerContentReferrer(s: ContentFileConstructor){
     console.log(`registered content type: ${s.content_type}`)
     ContstructorTable[s.content_type] = s;
 }
-export function createContentReferrer(type:string,path:string,desc?:object){
+export function createContentFile(type:string,path:string,option?:object){
     const constructorMethod = ContstructorTable[type];
     if(constructorMethod === undefined){
         console.log(type);
         throw new Error("undefined");
     }
-    return new constructorMethod(path,desc);
+    return new constructorMethod(path,option);
 }
-export function getContentRefererConstructor(type:string): ContentFileConstructor|undefined{
+export function getContentFileConstructor(type:string): ContentFileConstructor|undefined{
     const ret = ContstructorTable[type];
     return ret;
 }

src/content/manga.ts

@@ -1,14 +1,25 @@
-import {ContentFile} from './referrer';
-import {createDefaultClass,registerContentReferrer} from './referrer';
-import {readZip} from '../util/zipwrap';
+import {ContentFile} from './file';
+import {createDefaultClass,registerContentReferrer} from './file';
+import {readZip,createReadStreamFromZip, readAllFromZip} from '../util/zipwrap';
 export class MangaReferrer extends createDefaultClass("manga"){
-    constructor(path:string){
+    desc: object|null|undefined;
+    constructor(path:string,option?:object|undefined){
         super(path);
-        /*(async ()=>{
-            const zip = await readZip(path);
-            const entry = zip.entries();
-
-        })*/
+    }
+    async getDesc(){
+        if(this.desc !== undefined){
+            return this.desc;
+        }
+        const zip = await readZip(this.path);
+        const entry = zip.entry("desc.json");
+        if(entry === undefined){
+            this.desc = null;
+            return this.desc;
+        }
+        const data = (await readAllFromZip(zip,entry)).toString('utf-8');
+        this.desc = JSON.parse(data);
+        if(this.desc === undefined) throw new Error("??? JSON.parse is returning undefined");
+        return this.desc;
     }
 };
 registerContentReferrer(MangaReferrer);

src/content/mod.ts

@@ -1,3 +1,3 @@
 import './manga';
 import './video';
-export {ContentFile as ContentReferrer,createContentReferrer} from './referrer';
+export {ContentFile, createContentFile} from './file';

src/content/video.ts

@@ -1,5 +1,5 @@
-import {ContentFile, registerContentReferrer} from './referrer';
-import {createDefaultClass} from './referrer';
+import {ContentFile, registerContentReferrer} from './file';
+import {createDefaultClass} from './file';
 
 export class VideoReferrer extends createDefaultClass("video"){
     constructor(path:string,desc?:object){

src/util/zipwrap.ts

@@ -34,3 +34,12 @@ export async function createReadStreamFromZip(zip:StreamZip,entry: ZipEntry):Pro
         });}
     );
 }
+export async function readAllFromZip(zip:StreamZip,entry: ZipEntry):Promise<Buffer>{
+    const stream = await createReadStreamFromZip(zip,entry);
+    const chunks:Uint8Array[] = [];
+    return new Promise((resolve,reject)=>{
+        stream.on('data',(data)=>{chunks.push(data)});
+        stream.on('error', (err)=>reject(err));
+        stream.on('end',()=>resolve(Buffer.concat(chunks)));
+    });
+}