1 files changed, 112 insertions, 0 deletions
diff --git a/main/src/cgeo/geocaching/PersonalNote.java b/main/src/cgeo/geocaching/PersonalNote.java
new file mode 100644
index 0000000..3a0f177
--- /dev/null
+++ b/main/src/cgeo/geocaching/PersonalNote.java
@@ -0,0 +1,112 @@
+package cgeo.geocaching;
+
+import org.apache.commons.lang3.StringUtils;
+
+
+public class PersonalNote {
+    private static final String MERGED_PREFIX = "merged:\n";
+    private static final String SEPARATOR = "--\n";
+    private String cgeoNote;
+    private String providerNote;
+    private boolean isOffline;
+
+    private PersonalNote() {
+        // Empty default constructor
+    }
+
+    public PersonalNote(final Geocache cache) {
+        final String personalNote = cache.getPersonalNote();
+        if (!StringUtils.startsWith(personalNote, MERGED_PREFIX)) {
+            this.providerNote = personalNote;
+            return;
+        }
+        final String[] notes = StringUtils.splitByWholeSeparator(personalNote, SEPARATOR);
+        if (notes.length > 0) {
+            notes[0] = StringUtils.removeStart(notes[0], MERGED_PREFIX);
+            notes[0] = StringUtils.removeEnd(notes[0], "\n");
+        }
+        if (notes.length > 1) {
+            this.cgeoNote = notes[0];
+            this.providerNote = notes[1];
+        } else {
+            this.providerNote = notes[0];
+        }
+        this.isOffline = cache.isOffline();
+    }
+
+    public PersonalNote mergeWith(final PersonalNote other) {
+        if (StringUtils.isEmpty(cgeoNote) && StringUtils.isEmpty(other.cgeoNote)) {
+            return mergeOnlyProviderNotes(other);
+        }
+        final PersonalNote result = new PersonalNote();
+        if (cgeoNote != null && other.cgeoNote != null) {
+            if (other.isOffline) {
+                result.cgeoNote = other.cgeoNote;
+            } else {
+                result.cgeoNote = cgeoNote;
+            }
+        }
+        if (other.cgeoNote != null) {
+            result.cgeoNote = other.cgeoNote;
+        } else {
+            result.cgeoNote = cgeoNote;
+        }
+        if (providerNote != null && other.providerNote != null) {
+            if (isOffline) {
+                result.providerNote = providerNote;
+            } else {
+                result.providerNote = other.providerNote;
+            }
+        }
+        if (providerNote != null) {
+            result.providerNote = providerNote;
+        } else {
+            result.providerNote = other.providerNote;
+        }
+        return result;
+    }
+
+    /**
+     * Merge different provider notes from c:geo and provider.
+     *
+     * @param other
+     *            The note to merge
+     * @return PersonalNote The merged note
+     */
+    private PersonalNote mergeOnlyProviderNotes(final PersonalNote other) {
+        final PersonalNote result = new PersonalNote();
+        if (StringUtils.isNotEmpty(other.providerNote) && StringUtils.isNotEmpty(providerNote)) {
+            if (providerNote.equals(other.providerNote)) {
+                result.providerNote = providerNote;
+                return result;
+            }
+            if (other.isOffline) {
+                result.cgeoNote = other.providerNote;
+                result.providerNote = providerNote;
+            } else {
+                result.cgeoNote = providerNote;
+                result.providerNote = other.providerNote;
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuffer buffer = new StringBuffer();
+        if (cgeoNote != null) {
+            buffer.append(MERGED_PREFIX).append(cgeoNote).append("\n").append(SEPARATOR);
+        }
+        buffer.append(providerNote);
+        return buffer.toString();
+    }
+
+    public String getCgeoNote() {
+        return cgeoNote;
+    }
+
+    public String getProviderNote() {
+        return providerNote;
+    }
+
+}