feat(headers): add support for custom HTTP headers in clients

* Introduced `headers` property in `ClientConfig` interface.
* Updated `HeaderSpecClient` and `ResolveSpecClient` to utilize custom headers.
* Implemented `mergeHeaders` function to handle case-insensitive header merging.
* Added tests for custom header functionality in clients.

resolvespec-js/dist/index.js

@@ -1,29 +1,47 @@
 import { v4 as l } from "uuid";
-const d = /* @__PURE__ */ new Map();
-function E(n) {
-  const e = n.baseUrl;
-  let t = d.get(e);
-  return t || (t = new g(n), d.set(e, t)), t;
+function u(...r) {
+  const e = {};
+  for (const t of r)
+    for (const [s, n] of Object.entries(t)) {
+      for (const i of Object.keys(e))
+        i.toLowerCase() === s.toLowerCase() && delete e[i];
+      Object.defineProperty(e, s, { value: n, enumerable: !0, configurable: !0, writable: !0 });
+    }
+  return e;
 }
-class g {
+function m(r) {
+  return u(
+    { "Content-Type": "application/json" },
+    r.headers ?? {},
+    r.token ? { Authorization: `Bearer ${r.token}` } : {}
+  );
+}
+function p(r) {
+  const e = Object.entries(m(r)).map(([t, s]) => [t.toLowerCase(), s]).sort(([t], [s]) => t.localeCompare(s));
+  return JSON.stringify([r.baseUrl, e]);
+}
+const f = /* @__PURE__ */ new Map();
+function v(r) {
+  const e = p(r);
+  let t = f.get(e);
+  return t || (t = new y(r), f.set(e, t)), t;
+}
+class y {
   constructor(e) {
-    this.config = e;
+    this.config = { ...e, headers: { ...e.headers } };
   }
   buildUrl(e, t, s) {
-    let r = `${this.config.baseUrl}/${e}/${t}`;
-    return s && (r += `/${s}`), r;
+    let n = `${this.config.baseUrl}/${e}/${t}`;
+    return s && (n += `/${s}`), n;
   }
   baseHeaders() {
-    const e = {
-      "Content-Type": "application/json"
-    };
-    return this.config.token && (e.Authorization = `Bearer ${this.config.token}`), e;
+    return m(this.config);
   }
   async fetchWithError(e, t) {
-    const s = await fetch(e, t), r = await s.json();
+    const s = await fetch(e, t), n = await s.json();
     if (!s.ok)
-      throw new Error(r.error?.message || "An error occurred");
-    return r;
+      throw new Error(n.error?.message || "An error occurred");
+    return n;
   }
   async getMetadata(e, t) {
     const s = this.buildUrl(e, t);
@@ -32,11 +50,11 @@ class g {
       headers: this.baseHeaders()
     });
   }
-  async read(e, t, s, r) {
+  async read(e, t, s, n) {
     const i = typeof s == "number" || typeof s == "string" ? String(s) : void 0, a = this.buildUrl(e, t, i), c = {
       operation: "read",
       id: Array.isArray(s) ? s : void 0,
-      options: r
+      options: n
     };
     return this.fetchWithError(a, {
       method: "POST",
@@ -44,11 +62,11 @@ class g {
       body: JSON.stringify(c)
     });
   }
-  async create(e, t, s, r) {
+  async create(e, t, s, n) {
     const i = this.buildUrl(e, t), a = {
       operation: "create",
       data: s,
-      options: r
+      options: n
     };
     return this.fetchWithError(i, {
       method: "POST",
@@ -56,10 +74,10 @@ class g {
       body: JSON.stringify(a)
     });
   }
-  async update(e, t, s, r, i) {
-    const a = typeof r == "number" || typeof r == "string" ? String(r) : void 0, c = this.buildUrl(e, t, a), o = {
+  async update(e, t, s, n, i) {
+    const a = typeof n == "number" || typeof n == "string" ? String(n) : void 0, c = this.buildUrl(e, t, a), o = {
       operation: "update",
-      id: Array.isArray(r) ? r : void 0,
+      id: Array.isArray(n) ? n : void 0,
       data: s,
       options: i
     };
@@ -70,23 +88,23 @@ class g {
     });
   }
   async delete(e, t, s) {
-    const r = this.buildUrl(e, t, String(s)), i = {
+    const n = this.buildUrl(e, t, String(s)), i = {
       operation: "delete"
     };
-    return this.fetchWithError(r, {
+    return this.fetchWithError(n, {
       method: "POST",
       headers: this.baseHeaders(),
       body: JSON.stringify(i)
     });
   }
 }
-const f = /* @__PURE__ */ new Map();
-function _(n) {
-  const e = n.url;
-  let t = f.get(e);
-  return t || (t = new p(n), f.set(e, t)), t;
+const b = /* @__PURE__ */ new Map();
+function O(r) {
+  const e = r.url;
+  let t = b.get(e);
+  return t || (t = new S(r), b.set(e, t)), t;
 }
-class p {
+class S {
   constructor(e) {
     this.ws = null, this.messageHandlers = /* @__PURE__ */ new Map(), this.subscriptions = /* @__PURE__ */ new Map(), this.eventListeners = {}, this.state = "disconnected", this.reconnectAttempts = 0, this.reconnectTimer = null, this.heartbeatTimer = null, this.isManualClose = !1, this.config = {
       url: e.url,
@@ -110,12 +128,12 @@ class p {
           this.handleMessage(s.data);
         }, this.ws.onerror = (s) => {
           this.log("WebSocket error:", s);
-          const r = new Error("WebSocket connection error");
-          this.emit("error", r), t(r);
+          const n = new Error("WebSocket connection error");
+          this.emit("error", n), t(n);
         }, this.ws.onclose = (s) => {
           this.log("WebSocket closed:", s.code, s.reason), this.stopHeartbeat(), this.setState("disconnected"), this.emit("disconnect", s), this.config.reconnect && !this.isManualClose && this.reconnectAttempts < this.config.maxReconnectAttempts && (this.reconnectAttempts++, this.log(`Reconnection attempt ${this.reconnectAttempts}/${this.config.maxReconnectAttempts}`), this.setState("reconnecting"), this.reconnectTimer = setTimeout(() => {
-            this.connect().catch((r) => {
-              this.log("Reconnection failed:", r);
+            this.connect().catch((n) => {
+              this.log("Reconnection failed:", n);
             });
           }, this.config.reconnectInterval));
         };
@@ -129,8 +147,8 @@ class p {
   }
   async request(e, t, s) {
     this.ensureConnected();
-    const r = l(), i = {
-      id: r,
+    const n = l(), i = {
+      id: n,
       type: "request",
       operation: e,
       entity: t,
@@ -140,10 +158,10 @@ class p {
       options: s?.options
     };
     return new Promise((a, c) => {
-      this.messageHandlers.set(r, (o) => {
+      this.messageHandlers.set(n, (o) => {
         o.success ? a(o.data) : c(new Error(o.error?.message || "Request failed"));
       }), this.send(i), setTimeout(() => {
-        this.messageHandlers.has(r) && (this.messageHandlers.delete(r), c(new Error("Request timeout")));
+        this.messageHandlers.has(n) && (this.messageHandlers.delete(n), c(new Error("Request timeout")));
       }, 3e4);
     });
   }
@@ -167,9 +185,9 @@ class p {
       data: t
     });
   }
-  async update(e, t, s, r) {
+  async update(e, t, s, n) {
     return this.request("update", e, {
-      schema: r?.schema,
+      schema: n?.schema,
       record_id: t,
       data: s
     });
@@ -187,8 +205,8 @@ class p {
   }
   async subscribe(e, t, s) {
     this.ensureConnected();
-    const r = l(), i = {
-      id: r,
+    const n = l(), i = {
+      id: n,
       type: "subscription",
       operation: "subscribe",
       entity: e,
@@ -198,7 +216,7 @@ class p {
       }
     };
     return new Promise((a, c) => {
-      this.messageHandlers.set(r, (o) => {
+      this.messageHandlers.set(n, (o) => {
         if (o.success && o.data?.subscription_id) {
           const h = o.data.subscription_id;
           this.subscriptions.set(h, {
@@ -211,7 +229,7 @@ class p {
         } else
           c(new Error(o.error?.message || "Subscription failed"));
       }), this.send(i), setTimeout(() => {
-        this.messageHandlers.has(r) && (this.messageHandlers.delete(r), c(new Error("Subscription timeout")));
+        this.messageHandlers.has(n) && (this.messageHandlers.delete(n), c(new Error("Subscription timeout")));
       }, 1e4);
     });
   }
@@ -223,9 +241,9 @@ class p {
       operation: "unsubscribe",
       subscription_id: e
     };
-    return new Promise((r, i) => {
+    return new Promise((n, i) => {
       this.messageHandlers.set(t, (a) => {
-        a.success ? (this.subscriptions.delete(e), this.log(`Unsubscribed from ${e}`), r()) : i(new Error(a.error?.message || "Unsubscribe failed"));
+        a.success ? (this.subscriptions.delete(e), this.log(`Unsubscribed from ${e}`), n()) : i(new Error(a.error?.message || "Unsubscribe failed"));
       }), this.send(s), setTimeout(() => {
         this.messageHandlers.has(t) && (this.messageHandlers.delete(t), i(new Error("Unsubscribe timeout")));
       }, 1e4);
@@ -309,44 +327,44 @@ class p {
     this.config.debug && console.log("[WebSocketClient]", ...e);
   }
 }
-function v(n) {
-  return typeof btoa == "function" ? "ZIP_" + btoa(n) : "ZIP_" + Buffer.from(n, "utf-8").toString("base64");
+function W(r) {
+  return typeof btoa == "function" ? "ZIP_" + btoa(r) : "ZIP_" + Buffer.from(r, "utf-8").toString("base64");
 }
-function w(n) {
-  let e = n;
-  return e.startsWith("ZIP_") ? (e = e.slice(4).replace(/[\n\r ]/g, ""), e = m(e)) : e.startsWith("__") && (e = e.slice(2).replace(/[\n\r ]/g, ""), e = m(e)), (e.startsWith("ZIP_") || e.startsWith("__")) && (e = w(e)), e;
+function H(r) {
+  let e = r;
+  return e.startsWith("ZIP_") ? (e = e.slice(4).replace(/[\n\r ]/g, ""), e = g(e)) : e.startsWith("__") && (e = e.slice(2).replace(/[\n\r ]/g, ""), e = g(e)), (e.startsWith("ZIP_") || e.startsWith("__")) && (e = H(e)), e;
 }
-function m(n) {
-  return typeof atob == "function" ? atob(n) : Buffer.from(n, "base64").toString("utf-8");
+function g(r) {
+  return typeof atob == "function" ? atob(r) : Buffer.from(r, "base64").toString("utf-8");
 }
-function u(n) {
+function d(r) {
   const e = {};
-  if (n.columns?.length && (e["X-Select-Fields"] = n.columns.join(",")), n.omit_columns?.length && (e["X-Not-Select-Fields"] = n.omit_columns.join(",")), n.filters?.length)
-    for (const t of n.filters) {
-      const s = t.logic_operator ?? "AND", r = y(t.operator), i = S(t);
-      t.operator === "eq" && s === "AND" ? e[`X-FieldFilter-${t.column}`] = i : s === "OR" ? e[`X-SearchOr-${r}-${t.column}`] = i : e[`X-SearchOp-${r}-${t.column}`] = i;
+  if (r.columns?.length && (e["X-Select-Fields"] = r.columns.join(",")), r.omit_columns?.length && (e["X-Not-Select-Fields"] = r.omit_columns.join(",")), r.filters?.length)
+    for (const t of r.filters) {
+      const s = t.logic_operator ?? "AND", n = C(t.operator), i = E(t);
+      t.operator === "eq" && s === "AND" ? e[`X-FieldFilter-${t.column}`] = i : s === "OR" ? e[`X-SearchOr-${n}-${t.column}`] = i : e[`X-SearchOp-${n}-${t.column}`] = i;
     }
-  if (n.sort?.length) {
-    const t = n.sort.map((s) => s.direction.toUpperCase() === "DESC" ? `-${s.column}` : `+${s.column}`);
+  if (r.sort?.length) {
+    const t = r.sort.map((s) => s.direction.toUpperCase() === "DESC" ? `-${s.column}` : `+${s.column}`);
     e["X-Sort"] = t.join(",");
   }
-  if (n.limit !== void 0 && (e["X-Limit"] = String(n.limit)), n.offset !== void 0 && (e["X-Offset"] = String(n.offset)), n.cursor_forward && (e["X-Cursor-Forward"] = n.cursor_forward), n.cursor_backward && (e["X-Cursor-Backward"] = n.cursor_backward), n.preload?.length) {
-    const t = n.preload.map((s) => s.columns?.length ? `${s.relation}:${s.columns.join(",")}` : s.relation);
+  if (r.limit !== void 0 && (e["X-Limit"] = String(r.limit)), r.offset !== void 0 && (e["X-Offset"] = String(r.offset)), r.cursor_forward && (e["X-Cursor-Forward"] = r.cursor_forward), r.cursor_backward && (e["X-Cursor-Backward"] = r.cursor_backward), r.preload?.length) {
+    const t = r.preload.map((s) => s.columns?.length ? `${s.relation}:${s.columns.join(",")}` : s.relation);
     e["X-Preload"] = t.join("|");
   }
-  if (n.fetch_row_number && (e["X-Fetch-RowNumber"] = n.fetch_row_number), n.computedColumns?.length)
-    for (const t of n.computedColumns)
+  if (r.fetch_row_number && (e["X-Fetch-RowNumber"] = r.fetch_row_number), r.computedColumns?.length)
+    for (const t of r.computedColumns)
       e[`X-CQL-SEL-${t.name}`] = t.expression;
-  if (n.customOperators?.length) {
-    const t = n.customOperators.map(
+  if (r.customOperators?.length) {
+    const t = r.customOperators.map(
       (s) => s.sql
     );
     e["X-Custom-SQL-W"] = t.join(" AND ");
   }
   return e;
 }
-function y(n) {
-  switch (n) {
+function C(r) {
+  switch (r) {
     case "eq":
       return "equals";
     case "neq":
@@ -378,42 +396,39 @@ function y(n) {
     case "is_not_null":
       return "notempty";
     default:
-      return n;
+      return r;
   }
 }
-function S(n) {
-  return n.value === null || n.value === void 0 ? "" : Array.isArray(n.value) ? n.value.join(",") : String(n.value);
+function E(r) {
+  return r.value === null || r.value === void 0 ? "" : Array.isArray(r.value) ? r.value.join(",") : String(r.value);
 }
-const b = /* @__PURE__ */ new Map();
-function C(n) {
-  const e = n.baseUrl;
-  let t = b.get(e);
-  return t || (t = new H(n), b.set(e, t)), t;
+const w = /* @__PURE__ */ new Map();
+function T(r) {
+  const e = p(r);
+  let t = w.get(e);
+  return t || (t = new _(r), w.set(e, t)), t;
 }
-class H {
+class _ {
   constructor(e) {
-    this.config = e;
+    this.config = { ...e, headers: { ...e.headers } };
   }
   buildUrl(e, t, s) {
-    let r = `${this.config.baseUrl}/${e}/${t}`;
-    return s && (r += `/${s}`), r;
+    let n = `${this.config.baseUrl}/${e}/${t}`;
+    return s && (n += `/${s}`), n;
   }
   baseHeaders() {
-    const e = {
-      "Content-Type": "application/json"
-    };
-    return this.config.token && (e.Authorization = `Bearer ${this.config.token}`), e;
+    return m(this.config);
   }
   async fetchWithError(e, t) {
-    const s = await fetch(e, t), r = await s.json();
+    const s = await fetch(e, t), n = await s.json();
     if (!s.ok)
       throw new Error(
-        r.error?.message || `${s.statusText} (${s.status})`
+        n.error?.message || `${s.statusText} (${s.status})`
       );
     return {
-      data: r,
+      data: n,
       success: !0,
-      error: r.error ? r.error : void 0,
+      error: n.error ? n.error : void 0,
       metadata: {
         count: s.headers.get("content-range") ? Number(s.headers.get("content-range")?.split("/")[1]) : 0,
         total: s.headers.get("content-range") ? Number(s.headers.get("content-range")?.split("/")[1]) : 0,
@@ -425,45 +440,45 @@ class H {
       }
     };
   }
-  async read(e, t, s, r) {
-    const i = this.buildUrl(e, t, s), a = r ? u(r) : {};
+  async read(e, t, s, n) {
+    const i = this.buildUrl(e, t, s), a = n ? d(n) : {};
     return this.fetchWithError(i, {
       method: "GET",
-      headers: { ...this.baseHeaders(), ...a }
+      headers: u(this.baseHeaders(), a)
     });
   }
-  async create(e, t, s, r) {
-    const i = this.buildUrl(e, t), a = r ? u(r) : {};
+  async create(e, t, s, n) {
+    const i = this.buildUrl(e, t), a = n ? d(n) : {};
     return this.fetchWithError(i, {
       method: "POST",
-      headers: { ...this.baseHeaders(), ...a },
+      headers: u(this.baseHeaders(), a),
       body: JSON.stringify(s)
     });
   }
-  async update(e, t, s, r, i) {
-    const a = this.buildUrl(e, t, s), c = i ? u(i) : {};
+  async update(e, t, s, n, i) {
+    const a = this.buildUrl(e, t, s), c = i ? d(i) : {};
     return this.fetchWithError(a, {
       method: "PUT",
-      headers: { ...this.baseHeaders(), ...c },
-      body: JSON.stringify(r)
+      headers: u(this.baseHeaders(), c),
+      body: JSON.stringify(n)
     });
   }
   async delete(e, t, s) {
-    const r = this.buildUrl(e, t, s);
-    return this.fetchWithError(r, {
+    const n = this.buildUrl(e, t, s);
+    return this.fetchWithError(n, {
       method: "DELETE",
       headers: this.baseHeaders()
     });
   }
 }
 export {
-  H as HeaderSpecClient,
-  g as ResolveSpecClient,
-  p as WebSocketClient,
-  u as buildHeaders,
-  w as decodeHeaderValue,
-  v as encodeHeaderValue,
-  C as getHeaderSpecClient,
-  E as getResolveSpecClient,
-  _ as getWebSocketClient
+  _ as HeaderSpecClient,
+  y as ResolveSpecClient,
+  S as WebSocketClient,
+  d as buildHeaders,
+  H as decodeHeaderValue,
+  W as encodeHeaderValue,
+  T as getHeaderSpecClient,
+  v as getResolveSpecClient,
+  O as getWebSocketClient
 };