Adding MPS Export (#31)

* Initial Push

Inititial project state

* Static demo version

* static demo site - added variables

a

* first_implementation

* Updated UI, Improved Style to be more "Reactly", added Functionality

* add parsing functions

* change folder

* Import/Export Prototype

* Adding "reactjs-popup" to package,json

* Adding GLPK source

* Rough implementation of solver + example

* Show solution in output

* example 2 + popup lib

* removing import button

This feature won't be needed in this state of the project and might come back later. Right now it serves no functional purpose.

* Removing "Popout" button

This feature won't be needed in this state of the project and might come back later. Right now it serves no functional purpose.

* Updating Logs

Now the site displays all logs created with customLog(STRING). Logs can be cleared with customLogClear();

* Adding walltime

Can be called using:

Start:
function walltimeStart() {
returns Date.now();

Stop:
function walltimeStopAndPrint(startpoint: number) {
Add startpoint as argument.
It prints the elapsed time using customLog()

* Adding duals ouput

* Adding glpk.js package

required dependency

* adding LP format export and fixing a few errors

* fixing further errors

* adding automatic build

* Moving files to correct folders

* Update nextjs.yml

* Updating README and .gitignore

README:
- added installation instructions
- added troubleshooting

gitignore:
- skipping Writerside and .idea folders

* Update LICENCE.txt

We are required to use the same license. See https://github.com/hgourvest/node-glpk/blob/master/LICENSE

* Updating icon

* Adding RegEx input checks and updating text box explanations

* Update README.md

Updating license info

Signed-off-by: SinusFox <61253950+SinusFox@users.noreply.github.com>

* Deleting license to recreate proper license

* Update layout.tsx

fixing typo

Signed-off-by: SinusFox <61253950+SinusFox@users.noreply.github.com>

* Fixing word issue

English has some false friends... like the German "Enter" is actually return in English.

* Updatint License

* Fixing design issue and updating license link

* Fixing typo in log

* Fixing white mode

* adding translations 1/2

UI Translations

Coming in 2/2: Output translations

* adding output translations

* adding minimize button

* adding unit test for rendering home page

* fixing maxmin on lp export

* Update .gitignore

* Update .gitignore

* Update scripts.ts

* Update scripts.ts

* Update README.md

* adding tests

* Adding MPS Export

* Updating language file

* Updating Deployment Structure/GitHub Actions

* Update nextjsbuildonly.yml

---------

Signed-off-by: SinusFox <61253950+SinusFox@users.noreply.github.com>
Co-authored-by: moebiusl <lucas.moebius@icloud.com>
Co-authored-by: Marcel Pöppe <marcel.poeppe@gmail.com>

src/solver/jvail/Bound.tsx

@@ -0,0 +1,6 @@
+export interface Bound{
+    name: string;
+    type: number; // 1 for lower bound, 2 for upper bound, 3 for equal
+    ub: number;
+    lb: number;
+}

src/solver/jvail/Bounds.tsx

@@ -0,0 +1,9 @@
+export interface Bounds{ type: number, ub: number, lb: number }
+
+export const GLP_FR = 1;  /* free (unbounded) variable */
+export const GLP_LO = 2;  /* variable with lower bound */
+export const GLP_UP = 3;  /* variable with upper bound */
+export const GLP_DB = 4;  /* double-bounded variable */
+export const GLP_FX = 5;  /* fixed variable */
+export const GLP_MAX = 2;
+export const GLP_MIN = 1

src/solver/jvail/Constraint.tsx

@@ -0,0 +1,8 @@
+import {Variable} from "./Variable";
+import {Bounds} from "./Bounds";
+
+export interface Constraint {
+    name: string;
+    vars: Variable[];
+    bounds: Bounds;
+}

src/solver/jvail/LP.tsx

@@ -0,0 +1,18 @@
+import {Variable} from "./Variable";
+import {Bound} from "./Bound";
+import {Options} from "./Options";
+import {Constraint} from "./Constraint";
+
+export interface LP {
+    name: string,
+    objective: {
+        direction: number,
+        name: string,
+        vars: Variable[]
+    },
+    subjectTo: Constraint[],
+    bounds?: Bound[],
+    binaries?: string[],
+    generals?: string[],
+    options?: Options
+}

src/solver/jvail/Options.tsx

@@ -0,0 +1,12 @@
+import {Result} from "./Result";
+
+export interface Options {
+    mipgap?: number,    /* set relative mip gap tolerance to mipgap, default 0.0 */
+    tmlim?: number,     /* limit solution time to tmlim seconds, default INT_MAX */
+    msglev?: number,    /* message level for terminal output, default GLP_MSG_ERR */
+    presol?: boolean,   /* use presolver, default true */
+    cb?: {              /* a callback called at each 'each' iteration (only simplex) */
+        call(result: Result):Result,
+        each: number
+    }
+}

src/solver/jvail/Result.tsx

@@ -0,0 +1,10 @@
+export interface Result {
+    name: string;
+    time: number;
+    result: {
+        status: number;
+        z: number;
+        vars: {[key:string]: number};
+        dual?: { [key: string]: number }; /* simplex only */
+    };
+}

src/solver/jvail/Variable.tsx

@@ -0,0 +1,4 @@
+export interface Variable {
+    name: string;
+    coef: number
+}