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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"net/http"
"strconv"
"cloud.google.com/go/firestore"
firebase "firebase.google.com/go"
"github.com/gin-contrib/cors"
"github.com/gin-gonic/gin"
_ "github.com/lib/pq"
"google.golang.org/api/option"
)
var PAGINATION_LIMIT int8 = 4
type BlogPreview struct {
Name string `firestore:"name"`
Description string `firestore:"desc"`
Keywords []string `firestore:"keywords"`
Genre string `firestore:"genre"`
Date string `firestore:"dateCreated"`
TimeToRead int8 `firestore:"timeToRead"`
PostId int8 `firestore:"postId"`
}
type Tlink struct {
Name string `json:"name"`
Link string `json:"link"`
}
type ServerResponse struct {
Message string `json:"message"`
Data interface{} `json:"data"`
}
type Project struct {
Name string `firestore:"name"`
Description string `firestore:"description"`
Features []string `firestore:"features"`
Github string `firestore:"github"`
Website string `firestore:"website"`
}
type WorkExperience struct {
Name string `firestore:"name"`
Position string `firestore:"position"`
Responsibities []string `firestore:"responsibilities"`
FromDate string `firestore:"fromDate"`
ToDate string `firestore:"toDate"`
}
func min(a int8, b int8) int8 {
if a < b {
return a
}
return b
}
func paginatedPayload(aPayload []BlogPreview, pageNumber int8) []BlogPreview {
lPaginatedBlogPreviews := make([]BlogPreview, PAGINATION_LIMIT)
var lEndEntry int8 = PAGINATION_LIMIT * pageNumber //12
var lStartEntry int8 = lEndEntry - PAGINATION_LIMIT
var lCopyIndex int8 = 0
var lEndIndex = min(lEndEntry, int8(len(aPayload)))
for lIndex := lStartEntry; lIndex < lEndIndex; lIndex++ {
lPaginatedBlogPreviews[lCopyIndex] = aPayload[lIndex]
lCopyIndex++
}
return lPaginatedBlogPreviews
}
func getBlogPreviews(aContext *gin.Context, aFireStore *firestore.Client, ctx context.Context) {
pageNumber, err := strconv.Atoi(aContext.Param("page"))
lDocuments, err := aFireStore.Collection("blogPreviews").DocumentRefs(ctx).GetAll()
if err != nil {
log.Fatalf("An error occured")
}
var lBlogPrev BlogPreview = BlogPreview{}
var lData []BlogPreview = []BlogPreview{}
for _, lDocument := range lDocuments {
lDatum, _ := lDocument.Get(ctx)
if err := lDatum.DataTo(&lBlogPrev); err != nil {
fmt.Println(err)
}
lData = append(lData, lBlogPrev)
}
if err != nil {
var lResponse = ServerResponse{
Message: "Bad Request.",
Data: []string{},
}
aContext.IndentedJSON(http.StatusBadRequest, lResponse)
return
}
var lPaginationEnd = PAGINATION_LIMIT * int8(pageNumber)
if lPaginationEnd > int8(len(lData)+4) {
var lResponse = ServerResponse{
Message: "Page does not exist.",
Data: []string{},
}
aContext.IndentedJSON(http.StatusBadRequest, lResponse)
return
}
var lResponse = ServerResponse{
Message: "Cool",
Data: paginatedPayload(lData, int8(pageNumber)),
}
aContext.IndentedJSON(http.StatusOK, lResponse)
}
func getProjects(aContext *gin.Context, aFireStore *firestore.Client, ctx context.Context) {
lDocuments, err := aFireStore.Collection("projects").DocumentRefs(ctx).GetAll()
if err != nil {
log.Fatalf("An error occured") // TODO: Add error handling.
}
var lProj Project = Project{}
var lData []Project = []Project{}
for _, lDocument := range lDocuments {
lDatum, _ := lDocument.Get(ctx)
if err := lDatum.DataTo(&lProj); err != nil {
fmt.Println(err)
}
lData = append(lData, lProj)
}
var lResponse ServerResponse = ServerResponse{
Message: "Cool",
Data: lData,
}
aContext.IndentedJSON(http.StatusOK, lResponse)
}
func getWorkExperience(aContext *gin.Context, aFireStore *firestore.Client, ctx context.Context) {
lDocuments, err := aFireStore.Collection("workExperience").DocumentRefs(ctx).GetAll()
if err != nil {
log.Fatalf("An error occured") // TODO: Add error handling.
}
var lWorkExp WorkExperience = WorkExperience{}
var lData []WorkExperience = []WorkExperience{}
for _, lDocument := range lDocuments {
lDatum, _ := lDocument.Get(ctx)
if err := lDatum.DataTo(&lWorkExp); err != nil {
fmt.Println(err)
}
lData = append(lData, lWorkExp)
}
var lResponse ServerResponse = ServerResponse{
Message: "Cool",
Data: lData,
}
aContext.IndentedJSON(http.StatusOK, lResponse)
}
func main() {
ctx := context.Background()
sa := option.WithCredentialsFile("portfolio-blog-api-key.json")
app, err := firebase.NewApp(ctx, nil, sa)
if err != nil {
log.Fatalf("error initializing app: %v\n", err)
}
lFirestoreClient, err := app.Firestore(ctx)
if err != nil {
log.Fatal("error instantiating a firestore var")
}
lRouter := gin.New()
lRouter.Use(gin.Logger())
config := cors.DefaultConfig()
config.AllowAllOrigins = true
lRouter.Use(cors.New(config))
lRouter.GET("/work", func(aContext *gin.Context) {
getWorkExperience(aContext, lFirestoreClient, ctx)
})
lRouter.GET("/projects", func(aContext *gin.Context) {
getProjects(aContext, lFirestoreClient, ctx)
})
lRouter.GET("/blogpreviews/:page", func(aContext *gin.Context) {
getBlogPreviews(aContext, lFirestoreClient, ctx)
})
lRouter.Run(":8080")
}