implementation is ready

README.md

@@ -10,6 +10,24 @@ We recommend the use of TypeScript for best in class intellisense.
 ```typescript
 import * as nodehash from "nodehash";
 
-let sha256 = new nodehash.sha256();
-let myHashedString = sha256.fromString();
+// from stream
+let readStream = fs.createReadStream("./somefile.txt");
+nodehash.sha256FromStream(readStream)
+    .then((resultString){
+        console.log(resultString); // prints hash of the file
+    });
+
+// from file
+nodehash.sha256FromFile("./somefile.txt")
+    .then((resultString){
+        console.log(resultString); // prints hash of the file
+    });
+
+// from string
+nodehash.sha256FromString("some weird random string");
+    .then((resultString){
+        console.log(resultString); // prints hash of the file
+    });
+
+let hashString = nodehash.sha256FromStringSync("some weird random string")
 ```

dist/index.d.ts

@@ -0,0 +1 @@
+export * from "./nodehash.sha256";

dist/index.js

@@ -1,2 +1,6 @@
 "use strict";
-//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiaW5kZXguanMiLCJzb3VyY2VSb290IjoiIiwic291cmNlcyI6WyIuLi90cy9pbmRleC50cyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiIn0=
+function __export(m) {
+    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
+}
+__export(require("./nodehash.sha256"));
+//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiaW5kZXguanMiLCJzb3VyY2VSb290IjoiIiwic291cmNlcyI6WyIuLi90cy9pbmRleC50cyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiOzs7O0FBRUEsaUJBQWMsbUJBQW1CLENBQUMsRUFBQSJ9

dist/nodehash.helpers.d.ts

@@ -0,0 +1,2 @@
+/// <reference types="node" />
+export declare let hashStreamPipeStop: (resolveFuntion: any) => NodeJS.ReadWriteStream;

dist/nodehash.helpers.js

@@ -0,0 +1,13 @@
+"use strict";
+const plugins = require("./nodehash.plugins");
+exports.hashStreamPipeStop = (resolveFuntion) => {
+    let forEach = (chunk, enc, cb) => {
+        resolveFuntion(chunk.toString("utf8"));
+        cb(null, chunk);
+    };
+    let atEnd = (cb) => {
+        cb();
+    };
+    return plugins.through2(forEach, atEnd);
+};
+//# sourceMappingURL=data:application/json;base64,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

dist/nodehash.plugins.d.ts

@@ -1,2 +1,7 @@
 import "typings-global";
 export import crypto = require("crypto");
+export import fs = require("fs");
+export import path = require("path");
+export import q = require("q");
+export import stream = require("stream");
+export import through2 = require("through2");

dist/nodehash.plugins.js

@@ -1,4 +1,9 @@
 "use strict";
 require("typings-global");
 exports.crypto = require("crypto");
-//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoibm9kZWhhc2gucGx1Z2lucy5qcyIsInNvdXJjZVJvb3QiOiIiLCJzb3VyY2VzIjpbIi4uL3RzL25vZGVoYXNoLnBsdWdpbnMudHMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IjtBQUFBLFFBQU8sZ0JBQWdCLENBQUMsQ0FBQTtBQUNWLGNBQU0sV0FBVyxRQUFRLENBQUMsQ0FBQyJ9
+exports.fs = require("fs");
+exports.path = require("path");
+exports.q = require("q");
+exports.stream = require("stream");
+exports.through2 = require("through2");
+//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoibm9kZWhhc2gucGx1Z2lucy5qcyIsInNvdXJjZVJvb3QiOiIiLCJzb3VyY2VzIjpbIi4uL3RzL25vZGVoYXNoLnBsdWdpbnMudHMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IjtBQUFBLFFBQU8sZ0JBQWdCLENBQUMsQ0FBQTtBQUNWLGNBQU0sV0FBVyxRQUFRLENBQUMsQ0FBQztBQUMzQixVQUFFLFdBQVcsSUFBSSxDQUFDLENBQUM7QUFDbkIsWUFBSSxXQUFXLE1BQU0sQ0FBQyxDQUFDO0FBQ3ZCLFNBQUMsV0FBVyxHQUFHLENBQUMsQ0FBQztBQUNqQixjQUFNLFdBQVcsUUFBUSxDQUFDLENBQUM7QUFDM0IsZ0JBQVEsV0FBVyxVQUFVLENBQUMsQ0FBQyJ9

dist/nodehash.sha256.d.ts

@@ -0,0 +1,18 @@
+/// <reference types="q" />
+import * as plugins from "./nodehash.plugins";
+/**
+ * creates sha256 Hash from Stream
+ */
+export declare let sha256FromStream: (input: any) => plugins.q.Promise<{}>;
+/**
+ * creates sha256 Hash from File;
+ */
+export declare let sha256FromFile: (filePath: string) => plugins.q.Promise<{}>;
+/**
+ * Computes sha256 Hash from String synchronously
+ */
+export declare let sha256FromStringSync: (stringArg: any) => any;
+/**
+ * Computes sha256 Hash from String
+ */
+export declare let sha256FromString: (stringArg: any) => plugins.q.Promise<{}>;

dist/nodehash.sha256.js

@@ -0,0 +1,48 @@
+"use strict";
+const plugins = require("./nodehash.plugins");
+const helpers = require("./nodehash.helpers");
+/**
+ * creates sha256 Hash from Stream
+ */
+exports.sha256FromStream = (input) => {
+    let done = plugins.q.defer();
+    let hash = plugins.crypto.createHash('sha256');
+    hash["setEncoding"]("hex");
+    input
+        .pipe(hash)
+        .pipe(helpers.hashStreamPipeStop(done.resolve));
+    return done.promise;
+};
+/**
+ * creates sha256 Hash from File;
+ */
+exports.sha256FromFile = (filePath) => {
+    let done = plugins.q.defer();
+    let absolutePath = plugins.path.resolve(filePath);
+    let readableStream = plugins.fs.createReadStream(absolutePath);
+    exports.sha256FromStream(readableStream)
+        .then((resultHashString) => {
+        done.resolve(resultHashString);
+    });
+    return done.promise;
+};
+/**
+ * Computes sha256 Hash from String synchronously
+ */
+exports.sha256FromStringSync = (stringArg) => {
+    let hash = plugins.crypto.createHash('sha256');
+    hash.update(stringArg);
+    return hash.digest("hex");
+};
+/**
+ * Computes sha256 Hash from String
+ */
+exports.sha256FromString = (stringArg) => {
+    let done = plugins.q.defer();
+    let hash = plugins.crypto.createHash('sha256');
+    hash.update(stringArg);
+    let hashResult = hash.digest("hex");
+    done.resolve(hashResult);
+    return done.promise;
+};
+//# sourceMappingURL=data:application/json;base64,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

package.json

@@ -14,7 +14,7 @@
   "keywords": [
     "hash",
     "node",
-    "sha"
+    "sha265"
   ],
   "author": "Lossless GmbH",
   "license": "MIT",
@@ -28,6 +28,10 @@
     "typings-test": "^1.0.1"
   },
   "dependencies": {
+    "@types/q": "0.x.x",
+    "@types/through2": "0.x.x",
+    "q": "^1.4.1",
+    "through2": "^2.0.1",
     "typings-global": "^1.0.6"
   }
 }

test/test.d.ts

@@ -0,0 +1 @@
+import "typings-test";

test/test.js

@@ -1 +1,46 @@
-//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoidGVzdC5qcyIsInNvdXJjZVJvb3QiOiIiLCJzb3VyY2VzIjpbInRlc3QudHMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiJ9
+"use strict";
+require("typings-test");
+const should = require("should");
+const fs = require("fs");
+const nodehash = require("../dist/index");
+describe("nodehash", function () {
+    describe("sha256FromStringSync", function () {
+        it("should convert a String to sha256 hash synchronously", function () {
+            let testHash = nodehash.sha256FromStringSync("test");
+            let testHash2 = nodehash.sha256FromStringSync("testString");
+            let testHash3 = nodehash.sha256FromStringSync("test");
+            should.equal(testHash, testHash3);
+            should.notEqual(testHash, "test");
+        });
+    });
+    describe("sha256fromStringSync", function () {
+        it("should convert a String to sha256 hash synchronously", function (done) {
+            nodehash.sha256FromString("test")
+                .then(resultString => {
+                let compareString = nodehash.sha256FromStringSync("test");
+                should.equal(resultString, compareString);
+                done();
+            });
+        });
+    });
+    describe("sha256fromStream", function () {
+        it("should convert a Stream to sha256 and resolve a promise with result", function (done) {
+            let readStream = fs.createReadStream("./test/testImageForHash.jpg");
+            nodehash.sha256FromStream(readStream)
+                .then((resultString) => {
+                should.equal(resultString, "45b80413ed93acb495691186ce61850449439f9183352b9bff96d5533fa1046c");
+                done();
+            });
+        });
+    });
+    describe("sha256fromFile", function () {
+        it("should convert a Stream to sha256 and resolve a promise with result", function (done) {
+            nodehash.sha256FromFile("./test/testImageForHash.jpg")
+                .then((resultString) => {
+                should.equal(resultString, "45b80413ed93acb495691186ce61850449439f9183352b9bff96d5533fa1046c");
+                done();
+            });
+        });
+    });
+});
+//# sourceMappingURL=data:application/json;base64,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

test/test.ts

@@ -0,0 +1,46 @@
+import "typings-test";
+import should = require("should");
+import fs = require("fs");
+
+import * as nodehash from "../dist/index";
+
+describe("nodehash",function(){
+    describe("sha256FromStringSync",function(){
+        it("should convert a String to sha256 hash synchronously",function(){
+            let testHash = nodehash.sha256FromStringSync("test");
+            let testHash2 = nodehash.sha256FromStringSync("testString");
+            let testHash3 = nodehash.sha256FromStringSync("test");
+            should.equal(testHash,testHash3);
+            should.notEqual(testHash,"test");
+        })
+    });
+    describe("sha256fromStringSync",function(){
+        it("should convert a String to sha256 hash synchronously",function(done){
+            nodehash.sha256FromString("test")
+                .then(resultString => {
+                    let compareString = nodehash.sha256FromStringSync("test");
+                    should.equal(resultString,compareString);
+                    done();
+                })
+        })
+    });
+    describe("sha256fromStream",function(){
+        it("should convert a Stream to sha256 and resolve a promise with result",function(done){
+            let readStream = fs.createReadStream("./test/testImageForHash.jpg");
+            nodehash.sha256FromStream(readStream)
+                .then((resultString:string) => {
+                    should.equal(resultString,"45b80413ed93acb495691186ce61850449439f9183352b9bff96d5533fa1046c")
+                    done();
+                });
+        })
+    });
+    describe("sha256fromFile",function(){
+        it("should convert a Stream to sha256 and resolve a promise with result",function(done){
+            nodehash.sha256FromFile("./test/testImageForHash.jpg")
+                .then((resultString:string) => {
+                    should.equal(resultString,"45b80413ed93acb495691186ce61850449439f9183352b9bff96d5533fa1046c")
+                    done();
+                });
+        })
+    });
+});

ts/index.ts

@@ -1 +1,3 @@
 import * as plugins from "./nodehash.plugins";
+
+export * from "./nodehash.sha256";

ts/nodehash.helpers.ts

@@ -0,0 +1,15 @@
+import * as plugins from "./nodehash.plugins";
+
+export let hashStreamPipeStop = (resolveFuntion) => {
+    let forEach = (chunk:Buffer,enc,cb) => {
+        resolveFuntion(chunk.toString("utf8"));
+        cb(null,chunk);
+    };
+
+    let atEnd = (cb) => {
+        cb();
+    };
+    
+    return plugins.through2(forEach,atEnd);
+};
+

ts/nodehash.plugins.ts

@@ -1,2 +1,7 @@
 import "typings-global";
-export import crypto = require("crypto");
+export import crypto = require("crypto");
+export import fs = require("fs");
+export import path = require("path");
+export import q = require("q");
+export import stream = require("stream");
+export import through2 = require("through2");

ts/nodehash.sha256.ts

@@ -0,0 +1,51 @@
+import * as plugins from "./nodehash.plugins";
+import * as helpers from "./nodehash.helpers";
+
+/**
+ * creates sha256 Hash from Stream
+ */
+export let sha256FromStream = (input) => {
+    let done = plugins.q.defer();
+    let hash = plugins.crypto.createHash('sha256');
+
+    hash["setEncoding"]("hex");
+    input
+        .pipe(hash)
+        .pipe(helpers.hashStreamPipeStop(done.resolve));
+    return done.promise;
+};
+
+/**
+ * creates sha256 Hash from File;
+ */
+export let sha256FromFile = (filePath:string) => {
+    let done = plugins.q.defer();
+    let absolutePath = plugins.path.resolve(filePath);
+    let readableStream = plugins.fs.createReadStream(absolutePath);
+    sha256FromStream(readableStream)
+        .then((resultHashString) => {
+            done.resolve(resultHashString);
+        });
+    return done.promise;
+}
+
+/**
+ * Computes sha256 Hash from String synchronously
+ */
+export let sha256FromStringSync = (stringArg) => {
+    let hash = plugins.crypto.createHash('sha256');
+    hash.update(stringArg);
+    return hash.digest("hex");
+};
+
+/**
+ * Computes sha256 Hash from String
+ */
+export let sha256FromString = (stringArg) => {
+    let done = plugins.q.defer();
+    let hash = plugins.crypto.createHash('sha256');
+    hash.update(stringArg);
+    let hashResult = hash.digest("hex");
+    done.resolve(hashResult);
+    return done.promise;
+};