commit a4e167e8653608fae9581bf89df0b6e958e5efb4 · edavis.dev/bsky-feeds

+16

cmd/feedweb/main.go

···

       1
       1
        
       package main

     

       2
       2
        
       

     

       3
       3
        
       import (

     

       4
       4
       +
       	"database/sql"

     

       4
       5
        
       	"golang.org/x/text/language"

     

       6
       6
       +
       	"math"

     

       5
       7
        
       	"net/http"

     

       6
       8
        
       	"strconv"

     

       7
       9
        
       

     
···

       9
       11
        
       	"github.com/bluesky-social/indigo/atproto/syntax"

     

       10
       12
        
       	"github.com/edavis/bsky-feeds/pkg/feeds"

     

       11
       13
        
       	"github.com/edavis/bsky-feeds/pkg/mostliked"

     

       14
       14
       +
       	"github.com/edavis/bsky-feeds/pkg/popular"

     

       12
       15
        
       	"github.com/labstack/echo/v4"

     

       13
       16
        
       	"github.com/labstack/echo/v4/middleware"

     

       17
       17
       +
       	sqlite "github.com/mattn/go-sqlite3"

     

       14
       18
        
       )

     

       15
       19
        
       

     

       16
       20
        
       type SkeletonRequest struct {

     
···

       29
       33
        
       var generators = FeedLookup{

     

       30
       34
        
       	"at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/most-liked":     mostliked.Feed,

     

       31
       35
        
       	"at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/most-liked-dev": mostliked.Feed,

     

       36
       36
       +
       

     

       37
       37
       +
       	"at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/popular":     popular.Feed,

     

       38
       38
       +
       	"at://did:plc:4nsduwlpivpuur4mqkbfvm6a/app.bsky.feed.generator/popular-dev": popular.Feed,

     

       32
       39
        
       }

     

       33
       40
        
       

     

       34
       41
        
       func getFeedSkeleton(c echo.Context) error {

     
···

       85
       92
        
       }

     

       86
       93
        
       

     

       87
       94
        
       func main() {

     

       95
       95
       +
       	sql.Register("sqlite3_custom", &sqlite.SQLiteDriver{

     

       96
       96
       +
       		ConnectHook: func(conn *sqlite.SQLiteConn) error {

     

       97
       97
       +
       			if err := conn.RegisterFunc("exp", math.Exp, true); err != nil {

     

       98
       98
       +
       				return err

     

       99
       99
       +
       			}

     

       100
       100
       +
       			return nil

     

       101
       101
       +
       		},

     

       102
       102
       +
       	})

     

       103
       103
       +
       

     

       88
       104
        
       	e := echo.New()

     

       89
       105
        
       	e.Use(middleware.Logger())

     

       90
       106
        
       	e.Use(middleware.Recover())

+104

pkg/popular/generator.go

···

       1
       1
       +
       package popular

     

       2
       2
       +
       

     

       3
       3
       +
       import (

     

       4
       4
       +
       	"context"

     

       5
       5
       +
       	"database/sql"

     

       6
       6
       +
       	"fmt"

     

       7
       7
       +
       	"log"

     

       8
       8
       +
       	"strconv"

     

       9
       9
       +
       	"strings"

     

       10
       10
       +
       

     

       11
       11
       +
       	appbsky "github.com/bluesky-social/indigo/api/bsky"

     

       12
       12
       +
       	"github.com/edavis/bsky-feeds/pkg/feeds"

     

       13
       13
       +
       )

     

       14
       14
       +
       

     

       15
       15
       +
       type PostRow struct {

     

       16
       16
       +
       	Uri   string

     

       17
       17
       +
       	Score float64

     

       18
       18
       +
       }

     

       19
       19
       +
       

     

       20
       20
       +
       func getPosts(ctx context.Context, dbCnx *sql.DB, langs []string, limit, offset int) ([]PostRow, error) {

     

       21
       21
       +
       	var queryParams []any

     

       22
       22
       +
       	var query strings.Builder

     

       23
       23
       +
       	fmt.Fprintf(&query, "select posts.uri, likes * exp( -1 * ( ( unixepoch('now') - create_ts ) / 1800.0 ) ) as score from posts")

     

       24
       24
       +
       	if len(langs) > 0 {

     

       25
       25
       +
       		fmt.Fprintf(&query, " left join langs on posts.uri = langs.uri where lang in (")

     

       26
       26
       +
       		for idx, lang := range langs {

     

       27
       27
       +
       			if idx > 0 {

     

       28
       28
       +
       				fmt.Fprintf(&query, ",")

     

       29
       29
       +
       			}

     

       30
       30
       +
       			fmt.Fprintf(&query, "?")

     

       31
       31
       +
       			queryParams = append(queryParams, lang)

     

       32
       32
       +
       		}

     

       33
       33
       +
       		fmt.Fprintf(&query, ")")

     

       34
       34
       +
       	}

     

       35
       35
       +
       	fmt.Fprintf(&query, " order by score desc limit ? offset ?")

     

       36
       36
       +
       	queryParams = append(queryParams, limit, offset)

     

       37
       37
       +
       

     

       38
       38
       +
       	fmt.Printf("query: %v %+v\n", query.String(), queryParams)

     

       39
       39
       +
       

     

       40
       40
       +
       	rows, err := dbCnx.QueryContext(ctx, query.String(), queryParams...)

     

       41
       41
       +
       	if err != nil {

     

       42
       42
       +
       		return nil, err

     

       43
       43
       +
       	}

     

       44
       44
       +
       	defer rows.Close()

     

       45
       45
       +
       

     

       46
       46
       +
       	var posts []PostRow

     

       47
       47
       +
       	for rows.Next() {

     

       48
       48
       +
       		var post PostRow

     

       49
       49
       +
       		if err := rows.Scan(&post.Uri, &post.Score); err != nil {

     

       50
       50
       +
       			return nil, err

     

       51
       51
       +
       		}

     

       52
       52
       +
       		posts = append(posts, post)

     

       53
       53
       +
       	}

     

       54
       54
       +
       

     

       55
       55
       +
       	return posts, nil

     

       56
       56
       +
       }

     

       57
       57
       +
       

     

       58
       58
       +
       func Feed(params feeds.FeedgenParams) appbsky.FeedGetFeedSkeleton_Output {

     

       59
       59
       +
       	ctx := context.Background()

     

       60
       60
       +
       	dbCnx, err := sql.Open("sqlite3_custom", "data/mostliked.db?_journal=WAL&_fk=on")

     

       61
       61
       +
       	if err != nil {

     

       62
       62
       +
       		log.Printf("error opening db: %v\n", err)

     

       63
       63
       +
       	}

     

       64
       64
       +
       	defer dbCnx.Close()

     

       65
       65
       +
       

     

       66
       66
       +
       	var langs []string

     

       67
       67
       +
       	for _, lang := range params.Langs {

     

       68
       68
       +
       		langs = append(langs, lang.String())

     

       69
       69
       +
       	}

     

       70
       70
       +
       

     

       71
       71
       +
       	offset := 0

     

       72
       72
       +
       	if params.Cursor != "" {

     

       73
       73
       +
       		if parsed, err := strconv.Atoi(params.Cursor); err == nil {

     

       74
       74
       +
       			offset = parsed

     

       75
       75
       +
       		} else {

     

       76
       76
       +
       			log.Printf("error converting cursor: %v\n", err)

     

       77
       77
       +
       		}

     

       78
       78
       +
       	}

     

       79
       79
       +
       

     

       80
       80
       +
       	rows, err := getPosts(ctx, dbCnx, langs, params.Limit, offset)

     

       81
       81
       +
       	if err != nil {

     

       82
       82
       +
       		log.Printf("error fetching rows: %v\n", err)

     

       83
       83
       +
       	}

     

       84
       84
       +
       

     

       85
       85
       +
       	var cursor string

     

       86
       86
       +
       	posts := make([]*appbsky.FeedDefs_SkeletonFeedPost, 0, params.Limit)

     

       87
       87
       +
       

     

       88
       88
       +
       	for _, row := range rows {

     

       89
       89
       +
       		posts = append(posts, &appbsky.FeedDefs_SkeletonFeedPost{Post: row.Uri})

     

       90
       90
       +
       	}

     

       91
       91
       +
       

     

       92
       92
       +
       	skeleton := appbsky.FeedGetFeedSkeleton_Output{

     

       93
       93
       +
       		Feed: posts,

     

       94
       94
       +
       	}

     

       95
       95
       +
       

     

       96
       96
       +
       	offset += len(posts)

     

       97
       97
       +
       	cursor = strconv.Itoa(offset)

     

       98
       98
       +
       

     

       99
       99
       +
       	if len(posts) == params.Limit {

     

       100
       100
       +
       		skeleton.Cursor = &cursor

     

       101
       101
       +
       	}

     

       102
       102
       +
       

     

       103
       103
       +
       	return skeleton

     

       104
       104
       +
       }