Add rowing machine endpoint

backend/go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/go-playground/validator/v10 v10.27.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/goccy/go-yaml v1.18.0 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
@@ -41,6 +41,11 @@ require (
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/quic-go/qpack v0.5.1 // indirect
 	github.com/quic-go/quic-go v0.54.0 // indirect
+	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd // indirect
+	github.com/tidwall/gjson v1.18.0 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.1 // indirect
+	github.com/tidwall/sjson v1.2.5 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.3.0 // indirect
 	go.uber.org/mock v0.5.0 // indirect

backend/go.sum

@@ -104,6 +104,8 @@ github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -174,6 +176,8 @@ github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1
 github.com/quic-go/quic-go v0.54.0 h1:6s1YB9QotYI6Ospeiguknbp2Znb/jZYjZLRXn9kMQBg=
 github.com/quic-go/quic-go v0.54.0/go.mod h1:e68ZEaCdyviluZmy44P6Iey98v/Wfz6HCjQEm+l8zTY=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd h1:CmH9+J6ZSsIjUK3dcGsnCnO41eRBOnY12zwkn5qVwgc=
+github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd/go.mod h1:hPqNNc0+uJM6H+SuU8sEs5K5IQeKccPqeSjfgcKGgPk=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -185,6 +189,16 @@ github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
+github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
+github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/tidwall/pretty v1.2.1 h1:qjsOFOWWQl+N3RsoF5/ssm1pHmJJwhjlSbZ51I6wMl4=
+github.com/tidwall/pretty v1.2.1/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/tidwall/sjson v1.2.5 h1:kLy8mja+1c9jlljvWTlSazM7cKDRfJuR/bOJhcY5NcY=
+github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.3.0 h1:Qd2W2sQawAfG8XSvzwhBeoGq71zXOC/Q1E9y/wUcsUA=

backend/handlers/handle_rowing.go

@@ -0,0 +1,154 @@
+package handlers
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/rwcarlsen/goexif/exif"
+
+	"adam-french.co.uk/backend/models"
+	"github.com/anthropics/anthropic-sdk-go"
+	"github.com/gin-gonic/gin"
+)
+
+type ExtractedRowingData struct {
+	TimeMinutes float64 `json:"timeMinutes"`
+	TimeSeconds float64 `json:"timeSeconds"`
+	Distance    float64 `json:"distance"`
+}
+
+func (store *Store) GetRowing(ctx *gin.Context) {
+	var rowing []models.Rowing
+	if err := store.DB.Order("Created_At DESC").Find(&rowing).Error; err != nil {
+		ctx.JSON(http.StatusInternalServerError, err.Error())
+		return
+	}
+	ctx.JSON(http.StatusOK, rowing)
+}
+
+func (store *Store) CreateRowing(ctx *gin.Context) {
+	file, err := ctx.FormFile("image")
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "image is required"})
+		return
+	}
+
+	f, err := file.Open()
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "failed to open image"})
+		return
+	}
+	defer f.Close()
+
+	// Get the date taken from the EXIF data
+	x, err := exif.Decode(f)
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "no EXIF data found"})
+		return
+	}
+
+	dateTaken, err := x.DateTime()
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "no date found in EXIF data"})
+		return
+	}
+
+	// Seek back to start since exif.Decode advanced the cursor
+	if _, err := f.Seek(0, io.SeekStart); err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "failed to seek image"})
+		return
+	}
+
+	data, err := io.ReadAll(f)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "failed to read image"})
+		return
+	}
+
+	allowedMediaTypes := map[string]bool{
+		"image/jpeg": true,
+		"image/png":  true,
+		"image/gif":  true,
+		"image/webp": true,
+	}
+	mediaType := file.Header.Get("Content-Type")
+	if !allowedMediaTypes[mediaType] {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "unsupported image type"})
+		return
+	}
+	encoded := base64.StdEncoding.EncodeToString(data)
+
+	// Build the message with an image + text prompt
+	message, err := store.ClaudeClient.Messages.New(context.Background(), anthropic.MessageNewParams{
+		Model:     anthropic.ModelClaudeHaiku4_5,
+		MaxTokens: 256,
+		Messages: []anthropic.MessageParam{
+			{
+				Role: "user",
+				Content: []anthropic.ContentBlockParamUnion{
+					// Image block
+					anthropic.NewImageBlock(anthropic.Base64ImageSourceParam{
+						Type:      "base64",
+						MediaType: anthropic.Base64ImageSourceMediaType(mediaType),
+						Data:      encoded,
+					}),
+					// Text prompt requesting exactly 2 variables
+					anthropic.NewTextBlock(
+						`Look at this rowing machine display. Extract the total elapsed time and total distance.
+
+Return ONLY a JSON object with these exact keys and numeric values:
+- "timeMinutes": total minutes (e.g. 2:30 = 2)
+- "timeSeconds": total seconds (e.g. 2:30 = 30)
+- "distance": distance in meters as a number (e.g. 5000)
+
+No text, no markdown, no explanation. Just the JSON object.`),
+				},
+			},
+		},
+	})
+
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "failed to analyze image"})
+		return
+	}
+
+	if len(message.Content) == 0 {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "empty response from Claude"})
+		return
+	}
+
+	extractedData := ExtractedRowingData{}
+	err = json.Unmarshal([]byte(message.Content[0].Text), &extractedData)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "failed to parse JSON response"})
+		return
+	}
+
+	if extractedData.Distance == 0 {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "invalid distance in image"})
+		return
+	}
+
+	totalSeconds := extractedData.TimeMinutes*60 + extractedData.TimeSeconds
+	totalDuration := time.Duration(totalSeconds * float64(time.Second))
+	per500m := time.Duration(totalSeconds / extractedData.Distance * 500 * float64(time.Second))
+
+	rowing := models.Rowing{
+		Date:        dateTaken,
+		Time:        totalDuration,
+		TimePer500m: per500m,
+		Distance:    extractedData.Distance,
+		Calories:    extractedData.Distance / 7500.0 * 500.0,
+	}
+
+	if err := store.DB.Create(&rowing).Error; err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": "failed to save rowing"})
+		return
+	}
+
+	ctx.JSON(http.StatusCreated, rowing)
+}

backend/models/models.go

@@ -55,3 +55,14 @@ type Favorite struct {
 	Name      string         `json:"name"`
 	Link      *string        `json:"link"`
 }
+
+type Rowing struct {
+	ID          uint           `gorm:"primarykey" json:"id"`
+	CreatedAt   time.Time      `json:"createdAt"`
+	DeletedAt   gorm.DeletedAt `gorm:"index" json:"deletedAt"`
+	Date        time.Time      `json:"date"`
+	Time        time.Duration  `json:"time"`
+	TimePer500m time.Duration  `json:"timePer500m"`
+	Distance    float64        `json:"distance"`
+	Calories    float64        `json:"calories"`
+}

backend/services/database.go

@@ -36,6 +36,7 @@ func migrateDatabase(db *gorm.DB) error {
 		&models.Post{},
 		&models.Activity{},
 		&models.Favorite{},
+		&models.Rowing{},
 	)
 	if err != nil {
 		return err