[new] refactor & rename, [fix] rescaled activity view performance

api/app-routes.go

@@ -126,12 +126,12 @@ func (api *API) createAppResourcesRoute(routeName string, args ...map[string]any
 			}
 
 			statistics := gin.H{
-				"TotalTimeLeftSeconds": (document.TotalPages - document.CurrentPage) * document.SecondsPerPage,
+				"TotalTimeLeftSeconds": (document.Pages - document.Page) * document.SecondsPerPage,
 				"WordsPerMinute":       "N/A",
 			}
 
 			if document.Words != nil && *document.Words != 0 {
-				statistics["WordsPerMinute"] = (*document.Words / document.TotalPages * document.ReadPages) / (document.TotalTimeSeconds / 60.0)
+				statistics["WordsPerMinute"] = (*document.Words / document.Pages * document.ReadPages) / (document.TotalTimeSeconds / 60.0)
 			}
 
 			templateVars["RelBase"] = "../"
@@ -513,12 +513,12 @@ func (api *API) identifyDocument(c *gin.Context) {
 	}
 
 	statistics := gin.H{
-		"TotalTimeLeftSeconds": (document.TotalPages - document.CurrentPage) * document.SecondsPerPage,
+		"TotalTimeLeftSeconds": (document.Pages - document.Page) * document.SecondsPerPage,
 		"WordsPerMinute":       "N/A",
 	}
 
 	if document.Words != nil && *document.Words != 0 {
-		statistics["WordsPerMinute"] = (*document.Words / document.TotalPages * document.ReadPages) / (document.TotalTimeSeconds / 60.0)
+		statistics["WordsPerMinute"] = (*document.Words / document.Pages * document.ReadPages) / (document.TotalTimeSeconds / 60.0)
 	}
 
 	templateVars["Data"] = document

api/ko-routes.go

@@ -25,8 +25,8 @@ type activityItem struct {
 	DocumentID string `json:"document"`
 	StartTime  int64  `json:"start_time"`
 	Duration   int64  `json:"duration"`
-	CurrentPage int64  `json:"current_page"`
+	Page       int64  `json:"page"`
-	TotalPages  int64  `json:"total_pages"`
+	Pages      int64  `json:"pages"`
 }
 
 type requestActivity struct {
@@ -261,8 +261,8 @@ func (api *API) addActivities(c *gin.Context) {
 			DeviceID:   rActivity.DeviceID,
 			StartTime:  time.Unix(int64(item.StartTime), 0).UTC(),
 			Duration:   int64(item.Duration),
-			CurrentPage: int64(item.CurrentPage),
+			Page:       int64(item.Page),
-			TotalPages:  int64(item.TotalPages),
+			Pages:      int64(item.Pages),
 		}); err != nil {
 			log.Error("[addActivities] AddActivity DB Error:", err)
 			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": "Invalid Activity"})

client/syncninja.koplugin/main.lua

@@ -919,8 +919,8 @@ function SyncNinja:getStatisticsActivity(timestamp)
             document = rows[1][i],
             start_time = tonumber(rows[2][i]),
             duration = tonumber(rows[3][i]),
-            current_page = tonumber(rows[4][i]),
+            page = tonumber(rows[4][i]),
-            total_pages = tonumber(rows[5][i])
+            pages = tonumber(rows[5][i])
         })
     end
 

database/models.go

@@ -15,8 +15,8 @@ type Activity struct {
 	DeviceID   string    `json:"device_id"`
 	StartTime  time.Time `json:"start_time"`
 	Duration   int64     `json:"duration"`
-	CurrentPage int64     `json:"current_page"`
+	Page       int64     `json:"page"`
-	TotalPages  int64     `json:"total_pages"`
+	Pages      int64     `json:"pages"`
 	CreatedAt  time.Time `json:"created_at"`
 }
 
@@ -85,6 +85,7 @@ type RescaledActivity struct {
 	DeviceID   string    `json:"device_id"`
 	UserID     string    `json:"user_id"`
 	StartTime  time.Time `json:"start_time"`
+	Pages      int64     `json:"pages"`
 	Page       int64     `json:"page"`
 	Duration   int64     `json:"duration"`
 }

database/query.sql

@@ -141,8 +141,8 @@ INSERT INTO activity (
     device_id,
     start_time,
     duration,
-    current_page,
+    page,
-    total_pages
+    pages
 )
 VALUES (?, ?, ?, ?, ?, ?, ?)
 RETURNING *;
@@ -192,15 +192,15 @@ WITH true_progress AS (
         start_time AS last_read,
         SUM(duration) AS total_time_seconds,
         document_id,
-        current_page,
+        page,
-        total_pages,
+        pages,
 
 	-- Determine Read Pages
-	COUNT(DISTINCT current_page) AS read_pages,
+	COUNT(DISTINCT page) AS read_pages,
 
 	-- Derive Percentage of Book
-        ROUND(CAST(current_page AS REAL) / CAST(total_pages AS REAL) * 100, 2) AS percentage
+        ROUND(CAST(page AS REAL) / CAST(pages AS REAL) * 100, 2) AS percentage
-    FROM activity
+    FROM rescaled_activity
     WHERE user_id = $user_id
     AND document_id = $document_id
     GROUP BY document_id
@@ -210,8 +210,8 @@ WITH true_progress AS (
 SELECT
     documents.*,
 
-    CAST(IFNULL(current_page, 0) AS INTEGER) AS current_page,
+    CAST(IFNULL(page, 0) AS INTEGER) AS page,
-    CAST(IFNULL(total_pages, 0) AS INTEGER) AS total_pages,
+    CAST(IFNULL(pages, 0) AS INTEGER) AS pages,
     CAST(IFNULL(total_time_seconds, 0) AS INTEGER) AS total_time_seconds,
     CAST(DATETIME(IFNULL(last_read, "1970-01-01"), time_offset) AS TEXT) AS last_read,
     CAST(IFNULL(read_pages, 0) AS INTEGER) AS read_pages,
@@ -244,9 +244,9 @@ WITH true_progress AS (
         start_time AS last_read,
         SUM(duration) AS total_time_seconds,
         document_id,
-        current_page,
+        page,
-        total_pages,
+        pages,
-        ROUND(CAST(current_page AS REAL) / CAST(total_pages AS REAL) * 100, 2) AS percentage
+        ROUND(CAST(page AS REAL) / CAST(pages AS REAL) * 100, 2) AS percentage
     FROM activity
     WHERE user_id = $user_id
     GROUP BY document_id
@@ -255,8 +255,8 @@ WITH true_progress AS (
 SELECT
     documents.*,
 
-    CAST(IFNULL(current_page, 0) AS INTEGER) AS current_page,
+    CAST(IFNULL(page, 0) AS INTEGER) AS page,
-    CAST(IFNULL(total_pages, 0) AS INTEGER) AS total_pages,
+    CAST(IFNULL(pages, 0) AS INTEGER) AS pages,
     CAST(IFNULL(total_time_seconds, 0) AS INTEGER) AS total_time_seconds,
     CAST(DATETIME(IFNULL(last_read, "1970-01-01"), time_offset) AS TEXT) AS last_read,
 
@@ -295,8 +295,8 @@ SELECT
     title,
     author,
     duration,
-    current_page,
+    page,
-    total_pages
+    pages
 FROM activity
 LEFT JOIN documents ON documents.id = activity.document_id
 LEFT JOIN users ON users.id = activity.user_id
@@ -324,8 +324,8 @@ GROUP BY activity.device_id;
 
 -- name: GetDocumentReadStats :one
 SELECT
-    count(DISTINCT page) AS pages_read,
+    COUNT(DISTINCT page) AS pages_read,
-    sum(duration) AS total_time
+    SUM(duration) AS total_time
 FROM rescaled_activity
 WHERE document_id = $document_id
 AND user_id = $user_id
@@ -333,7 +333,7 @@ AND start_time >= $start_time;
 
 -- name: GetDocumentReadStatsCapped :one
 WITH capped_stats AS (
-    SELECT min(sum(duration), CAST($page_duration_cap AS INTEGER)) AS durations
+    SELECT MIN(SUM(duration), CAST($page_duration_cap AS INTEGER)) AS durations
     FROM rescaled_activity
     WHERE document_id = $document_id
     AND user_id = $user_id
@@ -341,20 +341,20 @@ WITH capped_stats AS (
     GROUP BY page
 )
 SELECT
-    CAST(count(*) AS INTEGER) AS pages_read,
+    CAST(COUNT(*) AS INTEGER) AS pages_read,
-    CAST(sum(durations) AS INTEGER) AS total_time
+    CAST(SUM(durations) AS INTEGER) AS total_time
 FROM capped_stats;
 
 -- name: GetDocumentDaysRead :one
 WITH document_days AS (
     SELECT DATE(start_time, time_offset) AS dates
-    FROM rescaled_activity
+    FROM activity
-    JOIN users ON users.id = rescaled_activity.user_id
+    JOIN users ON users.id = activity.user_id
     WHERE document_id = $document_id
     AND user_id = $user_id
     GROUP BY dates
 )
-SELECT CAST(count(*) AS INTEGER) AS days_read
+SELECT CAST(COUNT(*) AS INTEGER) AS days_read
 FROM document_days;
 
 -- name: GetUserWindowStreaks :one
@@ -381,7 +381,7 @@ partitions AS (
 ),
 streaks AS (
     SELECT
-        count(*) AS streak,
+        COUNT(*) AS streak,
         MIN(read_window) AS start_date,
         MAX(read_window) AS end_date,
         time_offset
@@ -431,10 +431,10 @@ LIMIT 1;
 
 -- name: GetDatabaseInfo :one
 SELECT
-    (SELECT count(rowid) FROM activity WHERE activity.user_id = $user_id) AS activity_size,
+    (SELECT COUNT(rowid) FROM activity WHERE activity.user_id = $user_id) AS activity_size,
-    (SELECT count(rowid) FROM documents) AS documents_size,
+    (SELECT COUNT(rowid) FROM documents) AS documents_size,
-    (SELECT count(rowid) FROM document_progress WHERE document_progress.user_id = $user_id) AS progress_size,
+    (SELECT COUNT(rowid) FROM document_progress WHERE document_progress.user_id = $user_id) AS progress_size,
-    (SELECT count(rowid) FROM devices WHERE devices.user_id = $user_id) AS devices_size
+    (SELECT COUNT(rowid) FROM devices WHERE devices.user_id = $user_id) AS devices_size
 LIMIT 1;
 
 -- name: GetDailyReadStats :many
@@ -448,7 +448,7 @@ WITH RECURSIVE last_30_days AS (
 ),
 activity_records AS (
     SELECT
-        sum(duration) AS seconds_read,
+        SUM(duration) AS seconds_read,
         DATE(start_time, time_offset) AS day
     FROM activity
     LEFT JOIN users ON users.id = activity.user_id

database/query.sql.go

@@ -19,11 +19,11 @@ INSERT INTO activity (
     device_id,
     start_time,
     duration,
-    current_page,
+    page,
-    total_pages
+    pages
 )
 VALUES (?, ?, ?, ?, ?, ?, ?)
-RETURNING id, user_id, document_id, device_id, start_time, duration, current_page, total_pages, created_at
+RETURNING id, user_id, document_id, device_id, start_time, duration, page, pages, created_at
 `
 
 type AddActivityParams struct {
@@ -32,8 +32,8 @@ type AddActivityParams struct {
 	DeviceID   string    `json:"device_id"`
 	StartTime  time.Time `json:"start_time"`
 	Duration   int64     `json:"duration"`
-	CurrentPage int64     `json:"current_page"`
+	Page       int64     `json:"page"`
-	TotalPages  int64     `json:"total_pages"`
+	Pages      int64     `json:"pages"`
 }
 
 func (q *Queries) AddActivity(ctx context.Context, arg AddActivityParams) (Activity, error) {
@@ -43,8 +43,8 @@ func (q *Queries) AddActivity(ctx context.Context, arg AddActivityParams) (Activ
 		arg.DeviceID,
 		arg.StartTime,
 		arg.Duration,
-		arg.CurrentPage,
+		arg.Page,
-		arg.TotalPages,
+		arg.Pages,
 	)
 	var i Activity
 	err := row.Scan(
@@ -54,8 +54,8 @@ func (q *Queries) AddActivity(ctx context.Context, arg AddActivityParams) (Activ
 		&i.DeviceID,
 		&i.StartTime,
 		&i.Duration,
-		&i.CurrentPage,
+		&i.Page,
-		&i.TotalPages,
+		&i.Pages,
 		&i.CreatedAt,
 	)
 	return i, err
@@ -155,8 +155,8 @@ SELECT
     title,
     author,
     duration,
-    current_page,
+    page,
-    total_pages
+    pages
 FROM activity
 LEFT JOIN documents ON documents.id = activity.document_id
 LEFT JOIN users ON users.id = activity.user_id
@@ -186,8 +186,8 @@ type GetActivityRow struct {
 	Title      *string `json:"title"`
 	Author     *string `json:"author"`
 	Duration   int64   `json:"duration"`
-	CurrentPage int64   `json:"current_page"`
+	Page       int64   `json:"page"`
-	TotalPages  int64   `json:"total_pages"`
+	Pages      int64   `json:"pages"`
 }
 
 func (q *Queries) GetActivity(ctx context.Context, arg GetActivityParams) ([]GetActivityRow, error) {
@@ -211,8 +211,8 @@ func (q *Queries) GetActivity(ctx context.Context, arg GetActivityParams) ([]Get
 			&i.Title,
 			&i.Author,
 			&i.Duration,
-			&i.CurrentPage,
+			&i.Page,
-			&i.TotalPages,
+			&i.Pages,
 		); err != nil {
 			return nil, err
 		}
@@ -238,7 +238,7 @@ WITH RECURSIVE last_30_days AS (
 ),
 activity_records AS (
     SELECT
-        sum(duration) AS seconds_read,
+        SUM(duration) AS seconds_read,
         DATE(start_time, time_offset) AS day
     FROM activity
     LEFT JOIN users ON users.id = activity.user_id
@@ -290,10 +290,10 @@ func (q *Queries) GetDailyReadStats(ctx context.Context, userID string) ([]GetDa
 
 const getDatabaseInfo = `-- name: GetDatabaseInfo :one
 SELECT
-    (SELECT count(rowid) FROM activity WHERE activity.user_id = ?1) AS activity_size,
+    (SELECT COUNT(rowid) FROM activity WHERE activity.user_id = ?1) AS activity_size,
-    (SELECT count(rowid) FROM documents) AS documents_size,
+    (SELECT COUNT(rowid) FROM documents) AS documents_size,
-    (SELECT count(rowid) FROM document_progress WHERE document_progress.user_id = ?1) AS progress_size,
+    (SELECT COUNT(rowid) FROM document_progress WHERE document_progress.user_id = ?1) AS progress_size,
-    (SELECT count(rowid) FROM devices WHERE devices.user_id = ?1) AS devices_size
+    (SELECT COUNT(rowid) FROM devices WHERE devices.user_id = ?1) AS devices_size
 LIMIT 1
 `
 
@@ -451,13 +451,13 @@ func (q *Queries) GetDocument(ctx context.Context, documentID string) (Document,
 const getDocumentDaysRead = `-- name: GetDocumentDaysRead :one
 WITH document_days AS (
     SELECT DATE(start_time, time_offset) AS dates
-    FROM rescaled_activity
+    FROM activity
-    JOIN users ON users.id = rescaled_activity.user_id
+    JOIN users ON users.id = activity.user_id
     WHERE document_id = ?1
     AND user_id = ?2
     GROUP BY dates
 )
-SELECT CAST(count(*) AS INTEGER) AS days_read
+SELECT CAST(COUNT(*) AS INTEGER) AS days_read
 FROM document_days
 `
 
@@ -475,8 +475,8 @@ func (q *Queries) GetDocumentDaysRead(ctx context.Context, arg GetDocumentDaysRe
 
 const getDocumentReadStats = `-- name: GetDocumentReadStats :one
 SELECT
-    count(DISTINCT page) AS pages_read,
+    COUNT(DISTINCT page) AS pages_read,
-    sum(duration) AS total_time
+    SUM(duration) AS total_time
 FROM rescaled_activity
 WHERE document_id = ?1
 AND user_id = ?2
@@ -503,7 +503,7 @@ func (q *Queries) GetDocumentReadStats(ctx context.Context, arg GetDocumentReadS
 
 const getDocumentReadStatsCapped = `-- name: GetDocumentReadStatsCapped :one
 WITH capped_stats AS (
-    SELECT min(sum(duration), CAST(?1 AS INTEGER)) AS durations
+    SELECT MIN(SUM(duration), CAST(?1 AS INTEGER)) AS durations
     FROM rescaled_activity
     WHERE document_id = ?2
     AND user_id = ?3
@@ -511,8 +511,8 @@ WITH capped_stats AS (
     GROUP BY page
 )
 SELECT
-    CAST(count(*) AS INTEGER) AS pages_read,
+    CAST(COUNT(*) AS INTEGER) AS pages_read,
-    CAST(sum(durations) AS INTEGER) AS total_time
+    CAST(SUM(durations) AS INTEGER) AS total_time
 FROM capped_stats
 `
 
@@ -546,15 +546,15 @@ WITH true_progress AS (
         start_time AS last_read,
         SUM(duration) AS total_time_seconds,
         document_id,
-        current_page,
+        page,
-        total_pages,
+        pages,
 
 	-- Determine Read Pages
-	COUNT(DISTINCT current_page) AS read_pages,
+	COUNT(DISTINCT page) AS read_pages,
 
 	-- Derive Percentage of Book
-        ROUND(CAST(current_page AS REAL) / CAST(total_pages AS REAL) * 100, 2) AS percentage
+        ROUND(CAST(page AS REAL) / CAST(pages AS REAL) * 100, 2) AS percentage
-    FROM activity
+    FROM rescaled_activity
     WHERE user_id = ?1
     AND document_id = ?2
     GROUP BY document_id
@@ -564,8 +564,8 @@ WITH true_progress AS (
 SELECT
     documents.id, documents.md5, documents.filepath, documents.coverfile, documents.title, documents.author, documents.series, documents.series_index, documents.lang, documents.description, documents.words, documents.gbid, documents.olid, documents.isbn10, documents.isbn13, documents.synced, documents.deleted, documents.updated_at, documents.created_at,
 
-    CAST(IFNULL(current_page, 0) AS INTEGER) AS current_page,
+    CAST(IFNULL(page, 0) AS INTEGER) AS page,
-    CAST(IFNULL(total_pages, 0) AS INTEGER) AS total_pages,
+    CAST(IFNULL(pages, 0) AS INTEGER) AS pages,
     CAST(IFNULL(total_time_seconds, 0) AS INTEGER) AS total_time_seconds,
     CAST(DATETIME(IFNULL(last_read, "1970-01-01"), time_offset) AS TEXT) AS last_read,
     CAST(IFNULL(read_pages, 0) AS INTEGER) AS read_pages,
@@ -618,8 +618,8 @@ type GetDocumentWithStatsRow struct {
 	Deleted          bool      `json:"-"`
 	UpdatedAt        time.Time `json:"updated_at"`
 	CreatedAt        time.Time `json:"created_at"`
-	CurrentPage      int64     `json:"current_page"`
+	Page             int64     `json:"page"`
-	TotalPages       int64     `json:"total_pages"`
+	Pages            int64     `json:"pages"`
 	TotalTimeSeconds int64     `json:"total_time_seconds"`
 	LastRead         string    `json:"last_read"`
 	ReadPages        int64     `json:"read_pages"`
@@ -650,8 +650,8 @@ func (q *Queries) GetDocumentWithStats(ctx context.Context, arg GetDocumentWithS
 		&i.Deleted,
 		&i.UpdatedAt,
 		&i.CreatedAt,
-		&i.CurrentPage,
+		&i.Page,
-		&i.TotalPages,
+		&i.Pages,
 		&i.TotalTimeSeconds,
 		&i.LastRead,
 		&i.ReadPages,
@@ -722,9 +722,9 @@ WITH true_progress AS (
         start_time AS last_read,
         SUM(duration) AS total_time_seconds,
         document_id,
-        current_page,
+        page,
-        total_pages,
+        pages,
-        ROUND(CAST(current_page AS REAL) / CAST(total_pages AS REAL) * 100, 2) AS percentage
+        ROUND(CAST(page AS REAL) / CAST(pages AS REAL) * 100, 2) AS percentage
     FROM activity
     WHERE user_id = ?1
     GROUP BY document_id
@@ -733,8 +733,8 @@ WITH true_progress AS (
 SELECT
     documents.id, documents.md5, documents.filepath, documents.coverfile, documents.title, documents.author, documents.series, documents.series_index, documents.lang, documents.description, documents.words, documents.gbid, documents.olid, documents.isbn10, documents.isbn13, documents.synced, documents.deleted, documents.updated_at, documents.created_at,
 
-    CAST(IFNULL(current_page, 0) AS INTEGER) AS current_page,
+    CAST(IFNULL(page, 0) AS INTEGER) AS page,
-    CAST(IFNULL(total_pages, 0) AS INTEGER) AS total_pages,
+    CAST(IFNULL(pages, 0) AS INTEGER) AS pages,
     CAST(IFNULL(total_time_seconds, 0) AS INTEGER) AS total_time_seconds,
     CAST(DATETIME(IFNULL(last_read, "1970-01-01"), time_offset) AS TEXT) AS last_read,
 
@@ -779,8 +779,8 @@ type GetDocumentsWithStatsRow struct {
 	Deleted          bool      `json:"-"`
 	UpdatedAt        time.Time `json:"updated_at"`
 	CreatedAt        time.Time `json:"created_at"`
-	CurrentPage      int64     `json:"current_page"`
+	Page             int64     `json:"page"`
-	TotalPages       int64     `json:"total_pages"`
+	Pages            int64     `json:"pages"`
 	TotalTimeSeconds int64     `json:"total_time_seconds"`
 	LastRead         string    `json:"last_read"`
 	Percentage       float64   `json:"percentage"`
@@ -815,8 +815,8 @@ func (q *Queries) GetDocumentsWithStats(ctx context.Context, arg GetDocumentsWit
 			&i.Deleted,
 			&i.UpdatedAt,
 			&i.CreatedAt,
-			&i.CurrentPage,
+			&i.Page,
-			&i.TotalPages,
+			&i.Pages,
 			&i.TotalTimeSeconds,
 			&i.LastRead,
 			&i.Percentage,
@@ -1002,7 +1002,7 @@ partitions AS (
 ),
 streaks AS (
     SELECT
-        count(*) AS streak,
+        COUNT(*) AS streak,
         MIN(read_window) AS start_date,
         MAX(read_window) AS end_date,
         time_offset

database/schema.sql

@@ -110,8 +110,8 @@ CREATE TABLE IF NOT EXISTS activity (
 
     start_time DATETIME NOT NULL,
     duration INTEGER NOT NULL,
-    current_page INTEGER NOT NULL,
+    page INTEGER NOT NULL,
-    total_pages INTEGER NOT NULL,
+    pages INTEGER NOT NULL,
     created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
 
     FOREIGN KEY (user_id) REFERENCES users (id),
@@ -119,6 +119,13 @@ CREATE TABLE IF NOT EXISTS activity (
     FOREIGN KEY (device_id) REFERENCES devices (id)
 );
 
+-- Indexes
+CREATE INDEX IF NOT EXISTS activity_start_time ON activity (start_time);
+CREATE INDEX IF NOT EXISTS activity_user_id_document_id ON activity (
+    user_id,
+    document_id
+);
+
 -- Update Trigger
 CREATE TRIGGER IF NOT EXISTS update_documents_updated_at
 BEFORE UPDATE ON documents BEGIN
@@ -130,20 +137,21 @@ END;
 -- Rescaled Activity View (Adapted from KOReader)
 CREATE VIEW IF NOT EXISTS rescaled_activity AS
 
-WITH RECURSIVE numbers (idx) AS (
+WITH RECURSIVE nums (idx) AS (
     SELECT 1 AS idx
     UNION ALL
     SELECT idx + 1
-    FROM numbers
+    FROM nums
     LIMIT 1000
 ),
 
-total_pages AS (
+current_pages AS (
     SELECT
         document_id,
-        total_pages AS pages
+        user_id,
+        pages
     FROM activity
-    GROUP BY document_id
+    GROUP BY document_id, user_id
     HAVING MAX(start_time)
     ORDER BY start_time DESC
 ),
@@ -153,25 +161,50 @@ intermediate AS (
         activity.document_id,
         activity.device_id,
         activity.user_id,
-        activity.current_page,
-        activity.total_pages,
-        total_pages.pages,
         activity.start_time,
         activity.duration,
-        numbers.idx,
+        activity.page,
-        -- Derive First Page
+        current_pages.pages,
-        ((activity.current_page - 1) * total_pages.pages) / activity.total_pages
+
+        -- Derive first page
+        ((activity.page - 1) * current_pages.pages) / activity.pages
         + 1 AS first_page,
-        -- Derive Last Page
+
+        -- Derive last page
         MAX(
-            ((activity.current_page - 1) * total_pages.pages)
+            ((activity.page - 1) * current_pages.pages)
-            / activity.total_pages
+            / activity.pages
             + 1,
-            (activity.current_page * total_pages.pages) / activity.total_pages
+            (activity.page * current_pages.pages) / activity.pages
         ) AS last_page
+
     FROM activity
-    INNER JOIN total_pages ON total_pages.document_id = activity.document_id
+    INNER JOIN current_pages ON
-    INNER JOIN numbers ON numbers.idx <= (last_page - first_page + 1)
+        current_pages.document_id = activity.document_id
+        AND current_pages.user_id = activity.user_id
+),
+
+-- Improves performance
+num_limit AS (
+    SELECT * FROM nums
+    LIMIT (SELECT MAX(last_page - first_page + 1) FROM intermediate)
+),
+
+rescaled_raw AS (
+    SELECT
+        document_id,
+        device_id,
+        user_id,
+        start_time,
+        last_page,
+	pages,
+        first_page + num_limit.idx - 1 AS page,
+        duration / (
+            last_page - first_page + 1.0
+        ) AS duration
+    FROM intermediate
+    JOIN num_limit ON
+        num_limit.idx <= (last_page - first_page + 1)
 )
 
 SELECT
@@ -179,6 +212,13 @@ SELECT
     device_id,
     user_id,
     start_time,
-    first_page + idx - 1 AS page,
+    pages,
-    duration / (last_page - first_page + 1) AS duration
+    page,
-FROM intermediate;
+
+    -- Round up if last page (maintains total duration)
+    CAST(CASE
+        WHEN page = last_page AND duration != CAST(duration AS INTEGER)
+            THEN duration + 1
+        ELSE duration
+    END AS INTEGER) AS duration
+FROM rescaled_raw;

templates/activity.html

@@ -45,7 +45,7 @@
             <p>{{ $activity.Duration }}</p>
           </td>
           <td class="p-3 border-b border-gray-200">
-            <p>{{ $activity.CurrentPage }} / {{ $activity.TotalPages }}</p>
+            <p>{{ $activity.Page }} / {{ $activity.Pages }}</p>
           </td>
         </tr>
         {{end}}

templates/document-edit.html

@@ -137,7 +137,7 @@
     <div>
 	<p class="text-gray-400">Progress</p>
 	<p class="font-medium text-lg">
-	{{ .Data.CurrentPage }} / {{ .Data.TotalPages }} ({{ .Data.Percentage }}%)
+	{{ .Data.Page }} / {{ .Data.Pages }} ({{ .Data.Percentage }}%)
 	</p>
     </div>
     <div>

templates/document.html

@@ -344,7 +344,7 @@
       <div>
 	  <p class="text-gray-500">Progress</p>
 	  <p class="font-medium text-lg">
-	    {{ .Data.CurrentPage }} / {{ .Data.TotalPages }} ({{ .Data.Percentage }}%)
+	    {{ .Data.Page }} / {{ .Data.Pages }} ({{ .Data.Percentage }}%)
 	  </p>
       </div>
       <!--

templates/documents.html

@@ -10,8 +10,8 @@
 <div class="grid grid-cols-1 gap-4 mb-4 md:grid-cols-2 lg:grid-cols-3">
   {{range $doc := .Data }}
   <div class="w-full relative">
-    <div class="flex gap-4 w-full p-4 bg-white shadow-lg dark:bg-gray-700 rounded">
+    <div class="flex gap-4 w-full h-full p-4 bg-white shadow-lg dark:bg-gray-700 rounded">
-      <div class="min-w-fit h-48 relative">
+      <div class="min-w-fit my-auto h-48 relative">
 	<a href="./documents/{{$doc.ID}}">
 	  <img class="rounded object-cover h-full" src="./documents/{{$doc.ID}}/cover"></img>
 	</a>
@@ -37,7 +37,7 @@
           <div>
               <p class="text-gray-400">Progress</p>
               <p class="font-medium">
-	      {{ $doc.CurrentPage }} / {{ $doc.TotalPages }} ({{ $doc.Percentage }}%)
+	      {{ $doc.Page }} / {{ $doc.Pages }} ({{ $doc.Percentage }}%)
               </p>
           </div>
         </div>

templates/home.html

@@ -100,7 +100,7 @@
 </div>
 
 <div class="grid grid-cols-2 gap-4 my-4 md:grid-cols-4">
-  <div class="w-full">
+  <a href="./documents" class="w-full">
     <div
       class="flex gap-4 w-full p-4 bg-white shadow-lg dark:bg-gray-700 rounded"
     >
@@ -111,9 +111,8 @@
         <p class="text-sm text-gray-400">Documents</p>
       </div>
     </div>
-  </div>
+  </a>
-
+  <a href="./activity" class="w-full">
-  <div class="w-full">
     <div
       class="flex gap-4 w-full p-4 bg-white shadow-lg dark:bg-gray-700 rounded"
     >
@@ -124,8 +123,7 @@
         <p class="text-sm text-gray-400">Activity Records</p>
       </div>
     </div>
-  </div>
+  </a>
-
   <div class="w-full">
     <div
       class="flex gap-4 w-full p-4 bg-white shadow-lg dark:bg-gray-700 rounded"
@@ -138,7 +136,6 @@
       </div>
     </div>
   </div>
-
   <div class="w-full">
     <div
       class="flex gap-4 w-full p-4 bg-white shadow-lg dark:bg-gray-700 rounded"