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silverbullet/common/hooks/page_namespace.ts

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import { Plug } from "../../plugos/plug.ts";
import { System } from "../../plugos/system.ts";
import { Hook, Manifest } from "../../plugos/types.ts";
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export type NamespaceOperation =
| "readFile"
| "writeFile"
| "listFiles"
| "getFileMeta"
| "deleteFile";
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export type PageNamespaceDef = {
pattern: string;
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operation: NamespaceOperation;
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};
export type PageNamespaceHookT = {
pageNamespace?: PageNamespaceDef;
};
type SpaceFunction = {
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operation: NamespaceOperation;
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pattern: RegExp;
plug: Plug<PageNamespaceHookT>;
name: string;
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env?: string;
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};
export class PageNamespaceHook implements Hook<PageNamespaceHookT> {
spaceFunctions: SpaceFunction[] = [];
constructor() {}
apply(system: System<PageNamespaceHookT>): void {
system.on({
plugLoaded: () => {
this.updateCache(system);
},
plugUnloaded: () => {
this.updateCache(system);
},
});
}
updateCache(system: System<PageNamespaceHookT>) {
this.spaceFunctions = [];
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for (const plug of system.loadedPlugs.values()) {
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if (plug.manifest?.functions) {
for (
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const [funcName, funcDef] of Object.entries(
plug.manifest.functions,
)
) {
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if (funcDef.pageNamespace) {
this.spaceFunctions.push({
operation: funcDef.pageNamespace.operation,
pattern: new RegExp(funcDef.pageNamespace.pattern),
plug,
name: funcName,
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env: funcDef.env,
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});
}
}
}
}
}
validateManifest(manifest: Manifest<PageNamespaceHookT>): string[] {
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const errors: string[] = [];
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if (!manifest.functions) {
return [];
}
for (const [funcName, funcDef] of Object.entries(manifest.functions)) {
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if (funcDef.pageNamespace) {
if (!funcDef.pageNamespace.pattern) {
errors.push(`Function ${funcName} has a namespace but no pattern`);
}
if (!funcDef.pageNamespace.operation) {
errors.push(`Function ${funcName} has a namespace but no operation`);
}
if (
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![
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"readFile",
"writeFile",
"getFileMeta",
"listFiles",
"deleteFile",
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].includes(funcDef.pageNamespace.operation)
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) {
errors.push(
`Function ${funcName} has an invalid operation ${funcDef.pageNamespace.operation}`,
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);
}
}
}
return errors;
}
}