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server/util/APIPathGen.js

@@ -0,0 +1,68 @@
+export function APIPathGen(obj, callback, path, pathParams) {
+    return new Proxy(obj, {
+        get(target, key) {
+            let nextPath;
+            if (path === undefined) {
+                nextPath = [key.toString()];
+            }
+            else {
+                nextPath = [...path, key.toString()];
+            }
+
+            if (pathParams !== undefined) {
+                pathParams = { ...pathParams };
+            }
+
+            const varType = target.__nextVarType;
+            let varKey = target.__nextVarKey;
+            let next;
+            if (varType !== undefined && varKey !== undefined) {
+                if(varType == 'number'){
+                    if(key != Number(key)){
+                        throw `${key} is not ${varType}`;
+                    }
+                    key = Number(key);
+                }
+                else if ((typeof key) !== varType) {
+                    throw `${key} is not ${varType}, but ${typeof key}`;
+                }
+                if(pathParams === undefined){
+                    pathParams = {}
+                }
+                pathParams[varKey] = key;
+                nextPath.pop();
+                next = target.next;
+            }
+            else if (key in target) {
+                next = target[key];
+            }
+            else {
+                throw `${nextPath} is not exists`;
+            }
+
+            if (typeof (next) === 'function') {
+                return callback(nextPath, next, pathParams);
+            }
+            return APIPathGen(next, callback, nextPath, pathParams);
+        }
+    })
+}
+
+//generic 인자로 '자동'을 주려면 생략해야하므로 2단 호출
+export function StrVar(key) {
+    return (next) => {
+        return {
+            __nextVarType: 'string',
+            __nextVarKey: key,
+            next
+        }
+    }
+}
+
+export function NumVar(key, next) {
+    return {
+        __nextVarType: 'number',
+        __nextVarKey: key,
+        next
+    }
+}