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silverbullet/packages/common/spaces/evented_space_primitives.ts
2022-09-12 14:50:37 +02:00

89 lines
2.3 KiB
TypeScript

import { EventHook } from "@plugos/plugos/hooks/event";
import { Plug } from "@plugos/plugos/plug";
import { FileMeta } from "../types";
import { FileData, FileEncoding, SpacePrimitives } from "./space_primitives";
export class EventedSpacePrimitives implements SpacePrimitives {
constructor(private wrapped: SpacePrimitives, private eventHook: EventHook) {}
fetchFileList(): Promise<FileMeta[]> {
return this.wrapped.fetchFileList();
}
proxySyscall(plug: Plug<any>, name: string, args: any[]): Promise<any> {
return this.wrapped.proxySyscall(plug, name, args);
}
invokeFunction(
plug: Plug<any>,
env: string,
name: string,
args: any[]
): Promise<any> {
return this.wrapped.invokeFunction(plug, env, name, args);
}
readFile(
name: string,
encoding: FileEncoding
): Promise<{ data: FileData; meta: FileMeta }> {
return this.wrapped.readFile(name, encoding);
}
async writeFile(
name: string,
encoding: FileEncoding,
data: FileData,
selfUpdate: boolean
): Promise<FileMeta> {
const newMeta = await this.wrapped.writeFile(
name,
encoding,
data,
selfUpdate
);
// This can happen async
if (name.endsWith(".md")) {
const pageName = name.substring(0, name.length - 3);
let text = "";
switch (encoding) {
case "string":
text = data as string;
break;
case "arraybuffer":
const decoder = new TextDecoder("utf-8");
text = decoder.decode(data as ArrayBuffer);
break;
case "dataurl":
throw Error("Data urls not supported in this context");
}
this.eventHook
.dispatchEvent("page:saved")
.then(() => {
return this.eventHook.dispatchEvent("page:index_text", {
name: pageName,
text,
});
})
.catch((e) => {
console.error("Error dispatching page:saved event", e);
});
}
return newMeta;
}
getFileMeta(name: string): Promise<FileMeta> {
return this.wrapped.getFileMeta(name);
}
async deleteFile(name: string): Promise<void> {
if (name.endsWith(".md")) {
const pageName = name.substring(0, name.length - 3);
await this.eventHook.dispatchEvent("page:deleted", pageName);
}
return this.wrapped.deleteFile(name);
}
}