consolidate exif parsing libraries - rework of timestamps

.gitignore

@@ -39,4 +39,5 @@ test.*
 *.sublime-workspace
 .DS_Store
 /coverage/
-.nyc_output/
+.nyc_output/
+.vscode*

package.json

@@ -53,7 +53,6 @@
     "nodemailer": "6.9.4",
     "reflect-metadata": "0.1.13",
     "sharp": "0.31.3",
-    "ts-exif-parser": "0.2.2",
     "ts-node-iptc": "1.0.11",
     "typeconfig": "2.1.2",
     "typeorm": "0.3.12",

src/backend/model/database/SearchManager.ts

@@ -364,7 +364,7 @@ export class SearchManager {
     for (const sort of sortings) {
       switch (sort.method) {
         case SortByTypes.Date:
-          query.addOrderBy('media.metadata.creationDate', sort.ascending ? 'ASC' : 'DESC');
+          query.addOrderBy('media.metadata.creationDate', sort.ascending ? 'ASC' : 'DESC'); //If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). If taken into account, it will alter the sort order. Probably should not be done.
           break;
         case SortByTypes.Rating:
           query.addOrderBy('media.metadata.rating', sort.ascending ? 'ASC' : 'DESC');
@@ -563,7 +563,12 @@ export class SearchManager {
           const textParam: { [key: string]: unknown } = {};
           textParam['from' + queryId] = (query as FromDateSearch).value;
           q.where(
-            `media.metadata.creationDate ${relation} :from${queryId}`,
+            `media.metadata.creationDate ${relation} :from${queryId}`, //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). 
+                                                                       //Example: -600 means in the database UTC-10:00. The time 20:00 in the evening in the UTC-10 timezone, is actually 06:00 the next morning 
+                                                                       //in UTC+00:00. To make search take that into account, one can subtract the offset from the creationDate to "pretend" the photo is taken
+                                                                       //in UTC time. Subtracting -600 minutes (because it's the -10:00 timezone), corresponds to adding 10 hours to the photo's timestamp, thus
+                                                                       //bringing it into the next day as if it was taken at UTC+00:00. Similarly subtracting a positive timezone from a timestamp will "pretend"
+                                                                       //the photo is taken earlier in time (e.g. subtracting 300 from the UTC+05:00 timezone).
             textParam
           );
 
@@ -585,8 +590,8 @@ export class SearchManager {
           const textParam: { [key: string]: unknown } = {};
           textParam['to' + queryId] = (query as ToDateSearch).value;
           q.where(
-            `media.metadata.creationDate ${relation} :to${queryId}`,
-            textParam
+            `media.metadata.creationDate ${relation} :to${queryId}`, //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
+            textParam 
           );
 
           return q;
@@ -790,15 +795,15 @@ export class SearchManager {
             if (tq.negate) {
 
               q.where(
-                `media.metadata.creationDate >= :to${queryId}`,
+                `media.metadata.creationDate >= :to${queryId}`,            //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                 textParam
-              ).orWhere(`media.metadata.creationDate < :from${queryId}`,
+              ).orWhere(`media.metadata.creationDate < :from${queryId}`,   //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                 textParam);
             } else {
               q.where(
-                `media.metadata.creationDate < :to${queryId}`,
+                `media.metadata.creationDate < :to${queryId}`,             //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                 textParam
-              ).andWhere(`media.metadata.creationDate >= :from${queryId}`,
+              ).andWhere(`media.metadata.creationDate >= :from${queryId}`, //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                 textParam);
             }
 
@@ -821,21 +826,25 @@ export class SearchManager {
               if (Config.Database.type === DatabaseType.sqlite) {
                 if (tq.daysLength == 0) {
                   q.where(
+                    //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                     `CAST(strftime('${duration}',media.metadataCreationDate/1000, 'unixepoch') AS INTEGER) ${relationEql} CAST(strftime('${duration}','now') AS INTEGER)`
                   );
                 } else {
                   q.where(
+                    //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                     `CAST(strftime('${duration}',media.metadataCreationDate/1000, 'unixepoch') AS INTEGER) ${relationTop} CAST(strftime('${duration}','now') AS INTEGER)`
                   )[whereFN](`CAST(strftime('${duration}',media.metadataCreationDate/1000, 'unixepoch') AS INTEGER) ${relationBottom} CAST(strftime('${duration}','now','-:diff${queryId} day') AS INTEGER)`,
                     textParam);
                 }
               } else {
                 if (tq.daysLength == 0) {
                   q.where(
+                    //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                     `CAST(FROM_UNIXTIME(media.metadataCreationDate/1000, '${duration}') AS SIGNED) ${relationEql} CAST(DATE_FORMAT(CURDATE(),'${duration}') AS SIGNED)`
                   );
                 } else {
                   q.where(
+                    //TODO: If media.metadata.creationDateOffset is defined, it is an offset of minutes (+/-). See explanation above.
                     `CAST(FROM_UNIXTIME(media.metadataCreationDate/1000, '${duration}') AS SIGNED) ${relationTop} CAST(DATE_FORMAT(CURDATE(),'${duration}') AS SIGNED)`
                   )[whereFN](`CAST(FROM_UNIXTIME(media.metadataCreationDate/1000, '${duration}') AS SIGNED) ${relationBottom} CAST(DATE_FORMAT((DATE_ADD(curdate(), INTERVAL -:diff${queryId} DAY)),'${duration}') AS SIGNED)`,
                     textParam);

src/backend/model/database/enitites/MediaEntity.ts

@@ -4,6 +4,7 @@ import {MediaDimension, MediaDTO, MediaMetadata,} from '../../../../common/entit
 import {PersonJunctionTable} from './PersonJunctionTable';
 import {columnCharsetCS} from './EntityUtils';
 import {CameraMetadata, FaceRegion, GPSMetadata, PositionMetaData,} from '../../../../common/entities/PhotoDTO';
+import { Utils } from '../../../../common/Utils';
 
 export class MediaDimensionEntity implements MediaDimension {
   @Column('int')
@@ -105,6 +106,15 @@ export class MediaMetadataEntity implements MediaMetadata {
   })
   @Index()
   creationDate: number;
+
+  @Column('smallint', {
+    transformer: {
+      from: (v) => Utils.getOffsetString(v), //from database repr. as smallint (minutes) to string (+/-HH:MM)
+      to: (v) => Utils.getOffsetMinutes(v), //from entiry repr. as string (+/-HH:MM) to smallint (minutes)
+    },
+  })
+  creationDateOffset?: string;
+
 
   @Column('int', {unsigned: true})
   fileSize: number;