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control-access.ts
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control-access.ts
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import { Field, Context, Policy, App } from "../../../main.js";
import {
ExtractFieldDecoded,
ExtractFieldInput,
ExtractFieldStorage,
ExtractParams,
HybridField,
} from "../../../chip-types/field.js";
type Params<DecodedType> = {
target_policies: { [key in "show" | "edit"]: Policy };
value_when_not_allowed: DecodedType | null;
};
export default class ControlAccess<
T extends Field<any, any, any>
> extends HybridField<
ExtractFieldInput<T>,
ExtractFieldDecoded<T>,
ExtractFieldStorage<T>,
ExtractFieldInput<T>,
ExtractFieldDecoded<T>,
ExtractFieldStorage<T>,
T
> {
typeName = "control-access";
edit_strategy: Policy;
show_strategy: Policy;
value_when_not_allowed: ExtractFieldDecoded<T> | null;
app: App;
constructor(base_field: T, params: Params<ExtractFieldDecoded<T>>) {
super(base_field);
this.edit_strategy = params.target_policies.edit;
this.show_strategy = params.target_policies.show;
this.value_when_not_allowed = params.value_when_not_allowed;
}
async isProperValue(
context: Context,
new_value: Parameters<T["checkValue"]>[1],
old_value: Parameters<T["checkValue"]>[2],
new_value_blessing_token: symbol | null
) {
if (!context.is_super) {
const result = await this.edit_strategy.check(context);
if (result && !result?.allowed) {
return Field.invalid(result.reason);
}
}
return this.virtual_field.checkValue(
context,
new_value,
old_value,
new_value_blessing_token
);
}
async decode(
context: Context,
value_in_db: ExtractFieldStorage<T>,
old_value: ExtractFieldDecoded<T>,
format_params: ExtractParams<T>
) {
if (!context.is_super) {
context.app.Logger.debug2(
"CONTROL ACCESS",
`Checking the access to field ${this.name}...`,
{ value_in_db }
);
const result = await this.show_strategy.check(context);
if (result && !result.allowed) {
context.app.Logger.debug2(
"CONTROL ACCESS",
`Access to field '${this.name}' not allowed!`,
result
);
value_in_db = (await this.encode(
context,
this
.value_when_not_allowed as unknown as ExtractFieldInput<T>
)) as any;
} else if (result?.allowed) {
context.app.Logger.debug2(
"CONTROL ACCESS",
`Access to field '${this.name}' is allowed!`,
result
);
}
}
const ret = await this.virtual_field.decode(
context,
value_in_db,
old_value,
format_params
);
return ret;
}
hasDefaultValue() {
return this.virtual_field.hasDefaultValue();
}
getDefaultValue(context: Context) {
return this.virtual_field.getDefaultValue(context);
}
}

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