Merge branch 'master' of github-tsch-brown:browngraphicslab/Dash-Web into new_search

1 files changed, 104 insertions, 0 deletions

diff --git a/src/new_fields/util.ts b/src/new_fields/util.ts
new file mode 100644
index 000000000..bbd8157f6
--- /dev/null
+++ b/src/new_fields/util.ts
@@ -0,0 +1,104 @@
+import { UndoManager } from "../client/util/UndoManager";
+import { Update, Doc, Field } from "./Doc";
+import { SerializationHelper } from "../client/util/SerializationHelper";
+import { ProxyField } from "./Proxy";
+import { FieldValue } from "./Types";
+import { RefField, Id } from "./RefField";
+import { ObjectField, Parent, OnUpdate } from "./ObjectField";
+import { action } from "mobx";
+
+export const setter = action(function (target: any, prop: string | symbol | number, value: any, receiver: any): boolean {
+    if (SerializationHelper.IsSerializing()) {
+        target[prop] = value;
+        return true;
+    }
+    if (typeof prop === "symbol") {
+        target[prop] = value;
+        return true;
+    }
+    const curValue = target.__fields[prop];
+    if (curValue === value || (curValue instanceof ProxyField && value instanceof RefField && curValue.fieldId === value[Id])) {
+        // TODO This kind of checks correctly in the case that curValue is a ProxyField and value is a RefField, but technically
+        // curValue should get filled in with value if it isn't already filled in, in case we fetched the referenced field some other way
+        return true;
+    }
+    if (value instanceof RefField) {
+        value = new ProxyField(value);
+    }
+    if (value instanceof ObjectField) {
+        //TODO Instead of target, maybe use target[Self]
+        if (value[Parent] && value[Parent] !== target) {
+            throw new Error("Can't put the same object in multiple documents at the same time");
+        }
+        value[Parent] = target;
+        value[OnUpdate] = updateFunction(target, prop, value, receiver);
+    }
+    if (curValue instanceof ObjectField) {
+        delete curValue[Parent];
+        delete curValue[OnUpdate];
+    }
+    target.__fields[prop] = value;
+    target[Update]({ '$set': { ["fields." + prop]: value instanceof ObjectField ? SerializationHelper.Serialize(value) : (value === undefined ? null : value) } });
+    UndoManager.AddEvent({
+        redo: () => receiver[prop] = value,
+        undo: () => receiver[prop] = curValue
+    });
+    return true;
+});
+
+export function getter(target: any, prop: string | symbol | number, receiver: any): any {
+    if (typeof prop === "symbol") {
+        return target.__fields[prop] || target[prop];
+    }
+    if (SerializationHelper.IsSerializing()) {
+        return target[prop];
+    }
+    return getField(target, prop);
+}
+
+export function getField(target: any, prop: string | number, ignoreProto: boolean = false, callback?: (field: Field | undefined) => void): any {
+    const field = target.__fields[prop];
+    if (field instanceof ProxyField) {
+        return field.value(callback);
+    }
+    if (field === undefined && !ignoreProto) {
+        const proto = getField(target, "proto", true);
+        if (proto instanceof Doc) {
+            let field = proto[prop];
+            if (field instanceof Promise) {
+                callback && field.then(callback);
+                return undefined;
+            } else {
+                callback && callback(field);
+                return field;
+            }
+        }
+    }
+    callback && callback(field);
+    return field;
+}
+
+export function deleteProperty(target: any, prop: string | number | symbol) {
+    if (typeof prop === "symbol") {
+        delete target[prop];
+        return true;
+    }
+    throw new Error("Currently properties can't be deleted from documents, assign to undefined instead");
+}
+
+export function updateFunction(target: any, prop: any, value: any, receiver: any) {
+    let current = ObjectField.MakeCopy(value);
+    return (diff?: any) => {
+        if (true || !diff) {
+            diff = { '$set': { ["fields." + prop]: SerializationHelper.Serialize(value) } };
+            const oldValue = current;
+            const newValue = ObjectField.MakeCopy(value);
+            current = newValue;
+            UndoManager.AddEvent({
+                redo() { receiver[prop] = newValue; },
+                undo() { receiver[prop] = oldValue; }
+            });
+        }
+        target[Update](diff);
+    };
+}
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