Implement layout and device list page

server/api-functions.js

@@ -6,6 +6,7 @@ const url = require("url");
 const querystring = require("querystring");
 
 const config = require("./config");
+const device = require("./device");
 
 const commaAscii = ",".charCodeAt(0);
 const newLineAscii = "\n".charCodeAt(0);
@@ -19,6 +20,7 @@ function filtersToQuery(filters) {
     for (let [k, v] of Object.entries(filter)) {
       let [param, op] = k.split(/([^a-zA-Z0-9\-_.].*)/, 2);
       if (!op || op === "=") q[param] = v;
+      else if (op === ">") q[param] = { $gt: v };
       else throw new Error(`Operator "${op}" not recognized`);
     }
     queries.push(q);
@@ -28,22 +30,63 @@ function filtersToQuery(filters) {
   else return { $or: queries };
 }
 
+function count(resource, filters, limit) {
+  return new Promise((resolve, reject) => {
+    let qs = {};
+    if (filters) {
+      let q = filtersToQuery(filters);
+      if (resource === "devices") q = device.transposeQuery(q);
+      qs.query = JSON.stringify(q);
+    }
+
+    if (limit) qs.limit = limit;
+
+    let options = url.parse(
+      `${config.GENIEACS_NBI}${resource}?${querystring.stringify(qs)}`
+    );
+
+    options.method = "HEAD";
+
+    let _http = options.protocol === "https:" ? https : http;
+
+    _http
+      .request(options, res => {
+        if (res.statusCode !== 200) {
+          reject(new Error(`Unexpected status code ${res.statusCode}`));
+          res.resume();
+          return;
+        }
+        resolve(+res.headers["total"]);
+      })
+      .end();
+  });
+}
+
 function query(resource, filters, limit, callback) {
   return new Promise((resolve, reject) => {
     let ret;
     if (!callback) ret = [];
-    let q = {};
-    if (filters) q.query = JSON.stringify(filtersToQuery(filters));
+    let qs = {};
+    if (filters) {
+      let q = filtersToQuery(filters);
+      if (resource === "devices") q = device.transposeQuery(q);
+      qs.query = JSON.stringify(q);
+    }
 
-    if (limit) q.limit = limit;
+    if (limit) qs.limit = limit;
 
     let options = url.parse(
-      `${config.GENIEACS_NBI}${resource}?${querystring.stringify(q)}`
+      `${config.GENIEACS_NBI}${resource}?${querystring.stringify(qs)}`
     );
 
     let _http = options.protocol === "https:" ? https : http;
 
     _http.get(options, res => {
+      if (res.statusCode !== 200) {
+        reject(new Error(`Unexpected status code ${res.statusCode}`));
+        res.resume();
+        return;
+      }
       let chunks = [];
       let bytes = 0;
       res.on("data", chunk => {
@@ -69,6 +112,7 @@ function query(resource, filters, limit, callback) {
 
           if (buf.length > 1) {
             let obj = JSON.parse(buf);
+            if (resource === "devices") obj = device.transpose(obj);
             if (ret) ret.push(obj);
             else callback(obj);
           }
@@ -89,6 +133,8 @@ function query(resource, filters, limit, callback) {
         }
         if (buf.length > 1) {
           let obj = JSON.parse(buf);
+          if (resource === "devices") obj = device.transpose(obj);
+
           if (ret) ret.push(obj);
           else callback(obj);
         }
@@ -104,3 +150,4 @@ function query(resource, filters, limit, callback) {
 }
 
 exports.query = query;
+exports.count = count;