first commit

api.go

@@ -0,0 +1,88 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"gopkg.in/mgo.v2/bson"
+)
+
+/*
+Api structure
+
+/weblabs
+	POST:  create a new weblab.  The payload must be
+	       {
+				"name": "web lab frendly name",
+				"cases": ["case_name_1", "case_name_2", ..., "case_name_n"],
+				"probabilities": [prob_1, prob_2, ..., prob_n],                 // the sum must be 1
+				"private": false,
+			}
+	GET:
+			returns the list of all the created weblabs
+
+/weblabs/<id>
+   GET:  returns the weblab as
+
+/weblabs/<id>/history
+	GET: get the history
+*/
+
+// the smallest value that makes two floats the same.
+const epsilon float64 = 0.000000001
+
+type Cases struct {
+	Name        string  `json:"name"`
+	Probability float64 `json:"probability"`
+}
+
+type WeblabDefinition struct {
+	Id      bson.ObjectId `json:"id"`
+	Name    string        `json:"name"`
+	Cases   []*Cases      `json:"cases"`
+	Private bool          `json:"private"`
+}
+
+func (w *WeblabDefinition) verifyCasesStructure() error {
+	names := make(map[string]bool)
+	for _, c := range w.Cases {
+		if c.Probability+epsilon < 0 {
+			return errors.New("probability cannot be less 0")
+		}
+		if c.Probability-epsilon > 1 {
+			return errors.New("probability cannot be greater 0")
+		}
+		c.Name = strings.Trim(c.Name, " \t\n\r")
+		if c.Name == "" {
+			return errors.New("weblab cannot have empty names")
+		}
+		names[c.Name] = true
+	}
+	if len(names) != len(w.Cases) {
+		return errors.New("multiple weblab cannot have the same name")
+	}
+	return nil
+}
+
+func (w *WeblabDefinition) VerifyProbabilitySum() {
+
+}
+func (w *WeblabDefinition) Verify() error {
+
+	return nil
+}
+
+func CreateNewWeblab(w http.ResponseWriter, request *http.Request) {
+	d := json.NewDecoder(request.Body)
+	wab := new(WeblabDefinition)
+	if err := d.Decode(d); err != nil {
+		w.WriteHeader(400)
+		fmt.Fprint(w, err.Error())
+		return
+	}
+	wab.Id = bson.NewObjectId()
+
+}