update web interface, tracking registrations

courses.py

@@ -246,6 +246,10 @@ def users_in_by_depts_live(depts=[], termid='181'):
             #print("Dept: %s" % d)
             match = re.search('^(%s)' % d, c['course_code'])
             if match:
+                if d == "STAT" and match.group() == "STAT":
+                    print("STAT")
+                else:
+                    continue
                 print("Getting enrollments for %s" % c['course_code'])
                 if d in courses_by_by_dept: courses_by_by_dept[d].append(c)
                 else: courses_by_by_dept[d] = [ c, ]
@@ -1019,7 +1023,7 @@ def enroll_id_list_to_shell(id_list, shell_id, v=0):
     existing_ids = set( [ x['user_id'] for x in existing.values() ])
 
     if v: print("To Enroll: %s" % str(id_list))
-    if v: print("\n\Already Enrolled: %s" % str(existing_ids))
+    if v: print(r"\n\Already Enrolled: %s" % str(existing_ids))
 
     enroll_us = id_list.difference(existing_ids)
     if v: print("\n\nTO ENROLL %s" % str(enroll_us))
@@ -1207,6 +1211,18 @@ def enroll_gott_workshops():
         json_str = match.group(1)  # Extract the JSON string
         try:
             signups = json.loads(json_str)  # Convert to Python list of dicts
+            # Normalize NBSP and spaces in key fields to make title/date matching robust
+            def _norm(v):
+                try:
+                    return str(v).replace('\xa0',' ').strip()
+                except Exception:
+                    return v
+            for s in signups:
+                if isinstance(s, dict):
+                    if 'training' in s and s['training'] is not None:
+                        s['training'] = _norm(s['training'])
+                    if 'date_rsvp' in s and s['date_rsvp'] is not None:
+                        s['date_rsvp'] = _norm(s['date_rsvp'])
             #print(json.dumps(signups,indent=2))
         except json.JSONDecodeError as e:
             print("Error decoding JSON:", e)
@@ -1255,7 +1271,8 @@ def enroll_gott_workshops():
         #['2025-06-01 17:00:00', 'GOTT 4: Assessments in Digital Learning', 21898],
 
         #['2025-08-11 13:00:00', 'GOTT 1: Introduction to Online Teaching with Canvas', 23232],
-        ['2025-09-01 17:00:00', r'GOTT 1: Intro to Online Teaching (Canvas, Accessibility and RSI) ', 23270],
+        #['2025-09-01 17:00:00', r'GOTT 1: Intro to Online Teaching (Canvas, Accessibility and RSI) ', 23270],
+        ['2025-09-14 17:00:00', r'GOTT 2: Intro to Asynchronous Online Teaching and Learning', 23290],
     ]
     #print(json.dumps(signups,indent=4))
     #print(json.dumps(by_email,indent=4))
@@ -1280,7 +1297,8 @@ def enroll_gott_workshops():
             'davidamancio791@gmail.com': 'damancio@gavilan.edu',
             'carissaamunoz83@gmail.com': 'amunoz@gavilan.edu',
             'jasonwcpa@yahoo.com': 'jwolowitz@gavilan.edu',
-
+            'fam.grzan@charter.net': 'rgrzan@gavilan.edu',
+            'carissaadangelo@yahoo.com': 'cmunoz@gavilan.edu',
             }
 
     for each_workshop in workshop_ids:
@@ -1288,12 +1306,18 @@ def enroll_gott_workshops():
         #    print(f"skipping {wkshp}")
         #    continue
         wkshp_date, wkshp_title, wkshp_shell_id = each_workshop
+        # local normalizer consistent with signup cleaning
+        def _norm(v):
+            try:
+                return str(v).replace('\xa0',' ').strip()
+            except Exception:
+                return v
         to_enroll = []
         #from_file = [ L.strip().split(' - ') for L in codecs.open(f'cache/{student_list}', 'r', 'utf-8').readlines() ]
         #print(from_file)
 
         for s in signups:
-            if wkshp_date == s['date_rsvp'] and wkshp_title == s['training']:
+            if _norm(wkshp_date) == _norm(s.get('date_rsvp')) and _norm(wkshp_title) == _norm(s.get('training')):
                 e = s['email'].lower()
                 if e in subs:
                     e = subs[e]
@@ -1418,7 +1442,7 @@ def make_ztc_list(sem='sp20'):
     ztc_by_dept = {}
     for R in responses:
         R = re.sub(',Yes','',R)
-        R = re.sub('\s\s+',',',R)
+        R = re.sub(r'\s\s+',',',R)
         
         parts = R.split(r',')     #name   courselist    yes
         #print(parts[1])
@@ -1903,7 +1927,8 @@ def create_sandboxes():
                             #(23083, ' Sandbox GOTT1 SU25'),
                             #(23015, ' Sandbox GOTT2 SU25'),
                             #(21898, ' Sandbox GOTT4 SU25'),
-                            (23270, ' Sandbox GOTT1 FA25SEPT'),
+                            #(23270, ' Sandbox GOTT1 FA25SEPT'),
+                            (23290, ' Sandbox GOTT2 FA25SEPT'),
                          ]
     filepath = 'cache/sandbox_courses.pkl'
     

interactive.py

@@ -243,6 +243,47 @@ def flask_thread(q):
     def useful_info_api_bridge():
         return server.useful_info_api()
 
+    # Bridge roster change APIs and simple pages
+    @app.route('/api/rosters/changes')
+    def roster_changes_bridge():
+        return server.api_roster_changes()
+
+    @app.route('/api/rosters/changes/user/<user_id>')
+    def roster_changes_user_bridge(user_id):
+        return server.api_roster_changes_by_user(user_id)
+
+    @app.route('/api/rosters/changes/course/<course_id>')
+    def roster_changes_course_bridge(course_id):
+        return server.api_roster_changes_by_course(course_id)
+
+    @app.route('/api/rosters/terms')
+    def roster_terms_bridge():
+        return server.api_roster_terms()
+
+    @app.route('/api/rosters/users')
+    def roster_users_bridge():
+        return server.api_roster_users()
+
+    @app.route('/api/rosters/courses')
+    def roster_courses_bridge():
+        return server.api_roster_courses()
+
+    @app.route('/courses')
+    def courses_page_bridge():
+        return server.courses_page()
+
+    @app.route('/users')
+    def users_page_bridge():
+        return server.users_page()
+
+    @app.route('/courses/<course_id>')
+    def courses_page_deeplink_bridge(course_id):
+        return server.courses_page_deeplink(course_id)
+
+    @app.route('/users/<user_id>')
+    def users_page_deeplink_bridge(user_id):
+        return server.users_page_deeplink(user_id)
+
     @app.route('/health')
     def health():
         return jsonify({'app': 'interactive.py', 'status': 'ok'})

pipelines.py

@@ -321,6 +321,337 @@ def move_to_folder(sem,year,folder,files):
         safe_move('cache/rosters/users-%s.csv' % folder,       'cache/rosters/%s/users.%s.csv' % (semester,now))
     if 'login.csv' in files:
         safe_move('cache/rosters/login-%s.csv' % folder,       'cache/rosters/%s/login.%s.csv' % (semester,now))
+
+# Build maps from the latest users/courses snapshot for nicer keys/names.
+# Return the path to the latest `{prefix}.*.csv` file found under `sem_path`.
+def _latest_snapshot_map(sem_path, prefix):
+    """Return path to latest `{prefix}.*.csv` file in `sem_path` or None if missing."""
+    try:
+        files = [f for f in os.listdir(sem_path) if f.startswith(prefix + '.') and f.endswith('.csv')]
+    except FileNotFoundError:
+        return None
+    def ts_of(name):
+        try:
+            label = name[len(prefix)+1:-4]
+            return datetime.datetime.strptime(label, '%Y-%m-%dT%H-%M')
+        except Exception:
+            return datetime.datetime.min
+    files.sort(key=ts_of)
+    return os.path.join(sem_path, files[-1]) if files else None
+
+# Helper to read CSV safely into list of dicts.
+# Read a CSV file into a list of dict rows; return [] if missing.
+def _read_csv_dicts(path):
+    """Read a CSV file into a list of normalized dict rows; returns [] if file missing.
+    - Normalizes header keys to lowercase and strips whitespace.
+    - Strips whitespace from string values.
+    """
+    rows = []
+    if not path or not os.path.exists(path):
+        return rows
+    with open(path, 'r', encoding='utf-8', newline='') as f:
+        reader = csv.DictReader(f)
+        for r in reader:
+            norm = {}
+            for k, v in (r.items() if r else []):
+                nk = (k.strip().lower() if isinstance(k, str) else k)
+                if isinstance(v, str):
+                    v = v.strip()
+                norm[nk] = v
+            if norm:
+                rows.append(norm)
+    return rows
+
+# Create user lookup keyed by `user_id` with basic fields for convenience.
+# Expected columns: status,user_id,login_id,last_name,first_name,email,password
+def _build_user_map(users_csv_path):
+    """Return dict keyed by `user_id` with selected fields from users.csv.
+    Expected columns: status,user_id,login_id,last_name,first_name,email,password
+    """
+    user_map = {}
+    for r in _read_csv_dicts(users_csv_path):
+        uid = r.get('user_id')
+        if not uid:
+            continue
+        user_map[str(uid)] = {
+            'user_id': str(uid),
+            'login_id': r.get('login_id',''),
+            'first_name': r.get('first_name',''),
+            'last_name': r.get('last_name',''),
+            'email': r.get('email',''),
+        }
+    return user_map
+
+# Create course lookup keyed by `course_id` with long/short names and term.
+# Expected columns: status,term_id,long_name,short_name,course_id,blueprint_course_id
+def _build_course_map(courses_csv_path):
+    """Return dict keyed by `course_id` from courses.csv, keeping long/short names.
+    Expected columns: status,term_id,long_name,short_name,course_id,blueprint_course_id
+    """
+    course_map = {}
+    for r in _read_csv_dicts(courses_csv_path):
+        cid = r.get('course_id')
+        if not cid:
+            continue
+        course_map[str(cid)] = {
+            'course_id': str(cid),
+            'term_id': r.get('term_id',''),
+            'long_name': r.get('long_name',''),
+            'short_name': r.get('short_name',''),
+        }
+    return course_map
+
+# Parse a timestamp label like 2025-01-31T14-00 into dt.
+# Return datetime or None if parsing fails.
+def _parse_label(label):
+    """Parse the timestamp label from filenames into a datetime; return None on failure."""
+    try:
+        return datetime.datetime.strptime(label, '%Y-%m-%dT%H-%M')
+    except Exception:
+        return None
+
+# Compute enrollment changes across semester snapshots and emit JSON indexes.
+# Walk enrollments/users/courses snapshots; detect adds/drops/changes; write by_course/by_user JSON.
+def compute_enrollment_changes(sem=None, year=None):
+    """Walk cache/rosters/<year><sem>/enrollments.*.csv ascending, detect adds/drops/changes.
+    - If `sem`/`year` omitted, prompt for a semester and resolve via semesters.find_term.
+    - Emits JSON files by course and by user for easy UI lookup.
+    """
+    if not sem or not year:
+        try:
+            import semesters
+            ans = input("Which semester? (e.g., 'fa25', 'Fall 2025', '2025 Fall'): ").strip()
+            rec = semesters.find_term(ans)
+            if not rec or not rec.get('standard'):
+                print("compute_enrollment_changes: could not parse semester input.")
+                return
+            std = rec['standard']  # e.g., 'Fall 2025'
+            parts = std.split()
+            season = (parts[0].lower() if len(parts) >= 2 else '').lower()
+            year = parts[1] if len(parts) >= 2 else ''
+            season_map = {'spring': 'spring', 'summer': 'summer', 'fall': 'fall', 'winter': 'winter'}
+            sem = season_map.get(season, season)
+        except Exception as ex:
+            print(f"compute_enrollment_changes: semester prompt failed: {ex}")
+            return
+    semester = f"{year}{sem}"
+    sem_path = os.path.join('cache', 'rosters', semester)
+    if not os.path.isdir(sem_path):
+        print(f"compute_enrollment_changes: missing folder {sem_path}")
+        return
+
+    # Discover all enrollment snapshots in time order
+    files = [f for f in os.listdir(sem_path) if f.startswith('enrollments.') and f.endswith('.csv')]
+    def snap_key(name):
+        label = name[len('enrollments.'):-4]
+        dt = _parse_label(label)
+        return (dt or datetime.datetime.min, label)
+    files.sort(key=snap_key)
+    if not files:
+        print(f"compute_enrollment_changes: no snapshots in {sem_path}")
+        return
+
+    # Build user/course maps from latest snapshots for enrichment
+    latest_users = _latest_snapshot_map(sem_path, 'users')
+    latest_courses = _latest_snapshot_map(sem_path, 'courses')
+    users_map = _build_user_map(latest_users)
+    courses_map = _build_course_map(latest_courses)
+
+    # Collect remote login info across all login snapshots
+    remote_info = {}
+    login_files = [f for f in os.listdir(sem_path) if f.startswith('login.') and f.endswith('.csv')]
+    def login_key(name):
+        label = name[len('login.'):-4]
+        dt = _parse_label(label)
+        return (dt or datetime.datetime.min, label)
+    login_files.sort(key=login_key)
+    for fname in login_files:
+        for r in _read_csv_dicts(os.path.join(sem_path, fname)):
+            uid = r.get('user_id')
+            if not uid:
+                continue
+            remote_info[str(uid)] = {
+                'remote': True,
+                'root_account': r.get('root_account','')
+            }
+    # merge remote flags into users_map
+    for uid, info in remote_info.items():
+        users_map.setdefault(uid, {'user_id': uid, 'login_id':'', 'first_name':'', 'last_name':'', 'email':''})
+        users_map[uid].update(info)
+
+    def choose_course_key(course_id):
+        cid = str(course_id or 'unknown')
+        detail = courses_map.get(cid, {})
+        # Course key at CRN level uses the course_id directly (e.g., 202570-12345)
+        key = cid
+        info = {'course_id': cid, 'long_name': detail.get('long_name',''), 'short_name': detail.get('short_name',''), 'term_id': detail.get('term_id','')}
+        return key, info
+
+    def choose_user_key(user_id):
+        uid = str(user_id or 'unknown')
+        info = users_map.get(uid, {})
+        # Prefer to show user_id (Canvas/SIS ID here), along with convenience fields
+        return uid, {
+            'user_id': uid,
+            'login_id': info.get('login_id',''),
+            'first_name': info.get('first_name',''),
+            'last_name': info.get('last_name',''),
+            'email': info.get('email',''),
+            'remote': info.get('remote', False),
+            'root_account': info.get('root_account',''),
+        }
+
+    # Accumulators
+    by_course = {}
+    by_user = {}
+
+    prev = {}
+    for fname in files:
+        label = fname[len('enrollments.'):-4]
+        snap_time = _parse_label(label)
+        path = os.path.join(sem_path, fname)
+        curr = {}
+        # Build state for this snapshot keyed by (course,user)
+        for r in _read_csv_dicts(path):
+            user_id = r.get('user_id')
+            course_id = r.get('course_id')
+            if not user_id and not course_id:
+                continue
+            key = (str(course_id or ''), str(user_id))
+            curr[key] = {
+                'status': r.get('status') or r.get('enrollment_state') or r.get('state') or '',
+                'role': r.get('role') or r.get('type') or '',
+            }
+
+        # Compare with previous snapshot (including the first, using empty prev for baseline)
+        all_keys = set(prev.keys()) | set(curr.keys())
+        for k in all_keys:
+            before = prev.get(k)
+            after = curr.get(k)
+            course_id, user_id = k
+            course_key, course_info = choose_course_key(course_id)
+            user_key, user_info = choose_user_key(user_id)
+
+            def emit(action, extra=None):
+                evt = {
+                    'time': (snap_time.isoformat(timespec='minutes') if snap_time else label),
+                    'action': action,
+                    'course_key': course_key,
+                    'course': course_info,
+                    'user_key': user_key,
+                    'user': user_info,
+                    'role': (after or before or {}).get('role',''),
+                    'status': (after or before or {}).get('status',''),
+                }
+                if before:
+                    evt['before'] = before
+                if after:
+                    evt['after'] = after
+                by_course.setdefault(course_key, []).append(evt)
+                by_user.setdefault(user_key, []).append(evt)
+
+            if before and not after:
+                # Row disappeared; if last known status was deleted, count as drop; otherwise record anomaly.
+                if (before.get('status','').lower() == 'deleted'):
+                    emit('drop')
+                else:
+                    emit('enrollment_row_removed')
+            elif after and not before:
+                # New row; if active, it's an add; otherwise note row added.
+                if (after.get('status','').lower() == 'active'):
+                    emit('add')
+                elif (after.get('status','').lower() == 'deleted'):
+                    emit('drop')
+                else:
+                    emit('enrollment_row_added')
+            elif before and after:
+                # detect attribute changes
+                role_changed = before.get('role') != after.get('role')
+                status_changed = before.get('status') != after.get('status')
+                if status_changed:
+                    if str(after.get('status','')).lower() == 'active':
+                        emit('add')
+                    elif str(after.get('status','')).lower() == 'deleted':
+                        emit('drop')
+                    else:
+                        emit('status_change')
+                if role_changed:
+                    emit('role_change')
+
+        prev = curr
+
+    # Also detect appearance/disappearance in users.csv and courses.csv sequences
+    def diff_entities(prefix, id_field, emit_fn):
+        seq = [f for f in os.listdir(sem_path) if f.startswith(prefix + '.') and f.endswith('.csv')]
+        def key_fn(name):
+            label = name[len(prefix)+1:-4]
+            dt = _parse_label(label)
+            return (dt or datetime.datetime.min, label)
+        seq.sort(key=key_fn)
+        prev_ids = set()
+        for fname in seq:
+            label = fname[len(prefix)+1:-4]
+            snap_time = _parse_label(label)
+            curr_ids = set()
+            for r in _read_csv_dicts(os.path.join(sem_path, fname)):
+                vid = r.get(id_field)
+                if vid:
+                    curr_ids.add(str(vid))
+            # added
+            for vid in sorted(curr_ids - prev_ids):
+                emit_fn('added', vid, snap_time, label)
+            # removed
+            for vid in sorted(prev_ids - curr_ids):
+                emit_fn('removed', vid, snap_time, label)
+            prev_ids = curr_ids
+
+    def emit_user_presence(action, uid, snap_time, label):
+        user_key, user_info = choose_user_key(uid)
+        evt = {
+            'time': (snap_time.isoformat(timespec='minutes') if snap_time else label),
+            'action': f'user_entry_{action}',
+            'user_key': user_key,
+            'user': user_info,
+        }
+        by_user.setdefault(user_key, []).append(evt)
+
+    def emit_course_presence(action, cid, snap_time, label):
+        course_key, course_info = choose_course_key(cid)
+        evt = {
+            'time': (snap_time.isoformat(timespec='minutes') if snap_time else label),
+            'action': f'course_entry_{action}',
+            'course_key': course_key,
+            'course': course_info,
+        }
+        by_course.setdefault(course_key, []).append(evt)
+
+    diff_entities('users', 'user_id', emit_user_presence)
+    diff_entities('courses', 'course_id', emit_course_presence)
+
+    # Sort events by time
+    def sort_key(e):
+        try:
+            return datetime.datetime.fromisoformat(e['time'])
+        except Exception:
+            return datetime.datetime.min
+    for k in by_course:
+        by_course[k].sort(key=sort_key)
+    for k in by_user:
+        by_user[k].sort(key=sort_key)
+
+    # Write results
+    out_all = {
+        'semester': semester,
+        'generated': datetime.datetime.now().isoformat(timespec='seconds'),
+        'by_course': by_course,
+        'by_user': by_user,
+    }
+    try:
+        with open(os.path.join(sem_path, 'enrollment_changes.json'), 'w', encoding='utf-8') as f:
+            f.write(json.dumps(out_all, indent=2))
+        print(f"compute_enrollment_changes: wrote {sem_path}/enrollment_changes.json")
+    except Exception as ex:
+        print(f"compute_enrollment_changes: failed to write output: {ex}")
     
 
 
@@ -451,6 +782,11 @@ def fetch_current_rosters(sftp=None, label_hour=None):
                 log(f"post-process for semester={this_sem} year={year} label={label_hour}")
                 convert_roster_files(this_sem,year,label_hour)
                 move_to_folder(this_sem,year,label_hour,saved)
+                # After moving into semester folder, compute enrollment changes timeline
+                try:
+                    compute_enrollment_changes(this_sem, year)
+                except Exception as ex_changes:
+                    log(f'enrollment change computation failed: {ex_changes}')
             except Exception as expp:
                 log(f'post-processing failed: {expp}')
         else:
@@ -606,118 +942,6 @@ def put_file(remotepath,localpath, localfile,prompt=1):
         sftp.close()
        
         
-#text = 
-    result = []
-    last_type = ''
-    #answer_text = ''
-    answer = []
-    in_a_list = ''
-    
-    # Get all the images
-    for k,value in doc_objects.items():
-        tempout.write( "->" + k + "=" + json.dumps(value,indent=2) + "\n\n\n--\n\n")
-        fetched = fetch_doc_image(k,value)
-
-    list_stack = []
-    list_depth = 0
-    last_list_depth = 0
-    for value in doc_content:
-        tempout.write( json.dumps(value,indent=2) + "\n\n\n")
-        if verbose: print(json.dumps(value, sort_keys=True, indent=4))
-
-        tag_fxn = handle_para
-        if 'paragraph' in value:
-            this_text = ''
-            
-            # First we deal with if we're in a list.
-            if 'bullet' in value['paragraph']:
-                # either we're (1)starting a new list, (2)in one (do nothing), 
-                #  (3)starting a nested one, or (4)finished a nested one. 
-                lid = value['paragraph']['bullet']['listId']
-                if not list_stack:  # 1
-                    list_stack.append(lid)
-                else:
-                    if not lid == list_stack[0]:
-                        if not lid in list_stack:   # 3
-                            list_stack.append(lid)
-                        else:                       # 4
-                            x = list_stack.pop()
-                            while x != lid: list_stack.pop()
-            elif len(list_stack) > 0:    
-                #  current para isn't a bullet but we still have a list open.             
-                list_stack = []
-                
-                
-            list_depth = len(list_stack)
-            deeper = list_depth - last_list_depth
-            if deeper > 0:
-                answer.append("<ul>" * deeper)
-            elif deeper < 0:
-                deeper = -1 * deeper
-                answer.append("</ul>" * deeper)
-            if len(list_stack):
-                tag_fxn = handle_li
-            
-            # NOW the tag_fxn is either 'para' or 'li'... let's get the styling info next,
-            elements = value.get('paragraph').get('elements')
-            if 'paragraphStyle' in value.get('paragraph'):
-                style = value.get('paragraph').get('paragraphStyle')
-                if 'namedStyleType' in style:
-                    type = style['namedStyleType']
-            
-            # and FINALLY, the actual contents.
-            for elem in elements:
-                # text content
-                this_text += read_paragraph_element_2(elem,type)
-                
-                # image content
-                if 'inlineObjectElement' in elem:
-                    vpi = elem['inlineObjectElement']
-                    if 'inlineObjectId' in vpi:
-                        ii = vpi['inlineObjectId']
-                        if ii in img_lookup:
-                            img = img_lookup[ii]
-                            h = img_heights[ii]
-                            w = img_widths[ii]
-                            this_text += '<img src="doc_images/%s" width="%i" height="%i" />' % (img,w,h)
-                
-                
-            # Now for something tricky. Call an appropriate handler, based on:
-            #  (a) what is the paragraph style type?
-            #  (b) is it different from the prev one?
-            
-            if last_type=='NORMAL_TEXT' and type!=last_type:
-                if this_text.strip():
-                    result.append(handle_answer(answer))
-                answer = []
-                #answer_text = ''
-            
-            if type=='HEADING_2' and this_text.strip():
-                result.append( handle_sec(this_text) )
-                this_text = ''
-            elif type=='HEADING_3' and this_text.strip(): 
-                result.append(handle_question(this_text,bracket))
-                this_text = ''
-            else:
-                if this_text.lower().startswith('tags:'):
-                    tag_fxn = handle_tags
-                if this_text.lower().startswith('icons:'):
-                    tag_fxn = handle_icons
-                if this_text.strip():
-                    answer.append(tag_fxn(this_text))
-                this_text = ''
-            last_type = type
-            last_list_depth = list_depth
-                
-        elif 'table' in value:
-            pass
-    
-                                      
-    result.append(handle_answer(answer))
-    return json.dumps(result,indent=4)
-
-
-
 
 def process_reg_history(term='fa25'):
     from collections import defaultdict
@@ -975,6 +1199,7 @@ if __name__ == "__main__":
                 4: ['Narrative timeline of section updates', process_reg_history],
                 5: ['Create narrative format all semesters', recreate_all],
                 6: ['Recreate reg_data from full reg history', recreate_reg_data],
+                7: ['Compute enrollment changes', compute_enrollment_changes],
     }
         
     '''1: ['Re-create schedule csv and json files from raw html',recent_schedules] ,  

server.py

@@ -17,8 +17,8 @@ from localcache import arrange_data_for_web, depts_with_classcounts, dept_with_s
 from yattag import Doc
 
 
-import socket
-this_host = socket.gethostname()
+import socket
+this_host = socket.gethostname()
 print('\n\n server host: ' + this_host, '\n\n')
 
 datafile2 = "cache/datafile.txt"
@@ -102,7 +102,9 @@ def a(t,h): return '<a href="%s">%s</a>' % (h,t)
 @app.route('/')
 def homepage():
     return tag('h1','Canvas Tools') + br + \
-           a('Useful Emails','/useful-info') + br + br + \
+           a('Useful Emails','/useful-info') + br + \
+           a('Course Changes','/courses') + br + \
+           a('User Changes','/users') + br + br + \
            a('Reload server','/rl') + br + \
            a('Shut down','/sd')
 
@@ -184,6 +186,28 @@ def useful_info_by_tag(tag):
         return useful_info_api()
 
 
+@app.route('/courses')
+def courses_page():
+    return render_template('courses.html')
+
+
+@app.route('/users')
+def users_page():
+    return render_template('users.html')
+
+
+@app.route('/courses/<course_id>')
+def courses_page_deeplink(course_id):
+    # Client-side Vue app will read location.pathname and deep-link.
+    return render_template('courses.html')
+
+
+@app.route('/users/<user_id>')
+def users_page_deeplink(user_id):
+    # Client-side Vue app will read location.pathname and deep-link.
+    return render_template('users.html')
+
+
 def _shutdown_server():
     func = request.environ.get('werkzeug.server.shutdown')
     if func is None:
@@ -213,6 +237,261 @@ def health():
     return jsonify({'app': 'server.py', 'status': 'ok'}), 200
 
 
+# Load enrollment change index JSON for a given term like '2025fall'.
+def _load_enrollment_changes(term):
+    base = os.path.join('cache', 'rosters', term, 'enrollment_changes.json')
+    if not os.path.exists(base):
+        return None
+    try:
+        with open(base, 'r', encoding='utf-8') as f:
+            return json.load(f)
+    except Exception:
+        return None
+
+
+# Resolve a term from query args: accept 'term' directly, or 'year'+'sem'.
+def _resolve_term(args):
+    term = args.get('term')
+    if term:
+        return term
+    year = args.get('year')
+    sem = args.get('sem')  # expect 'spring'|'summer'|'fall'
+    if year and sem:
+        return f"{year}{sem}"
+    return None
+
+
+def _list_terms_with_changes():
+    """Scan cache/rosters for terms that contain enrollment_changes.json and return sorted list.
+    Sort order uses semesters.py by converting 'YYYY<season>' to 'Season YYYY' and then to sort key.
+    """
+    base = os.path.join('cache', 'rosters')
+    out = []
+    if not os.path.isdir(base):
+        return out
+    # map lowercase season to title
+    title_map = {'spring': 'Spring', 'summer': 'Summer', 'fall': 'Fall', 'winter': 'Winter'}
+    try:
+        from semesters import season_to_number
+    except Exception:
+        season_to_number = {'Spring': '30', 'Summer': '50', 'Fall': '70', 'Winter': '10'}
+
+    for name in os.listdir(base):
+        term_path = os.path.join(base, name)
+        if not os.path.isdir(term_path):
+            continue
+        # accept both underscore and hyphen variants
+        f1 = os.path.join(term_path, 'enrollment_changes.json')
+        f2 = os.path.join(term_path, 'enrollment-changes.json')
+        if not (os.path.exists(f1) or os.path.exists(f2)):
+            continue
+        # parse 'YYYYseason'
+        yr = ''.join([c for c in name if c.isdigit()])
+        season = name[len(yr):]
+        if not (yr and season):
+            continue
+        season_title = title_map.get(season.lower())
+        if not season_title:
+            continue
+        human = f"{season_title} {yr}"
+        sis_code = f"{yr}{season_to_number.get(season_title, '00')}"
+        out.append({
+            'term': name,
+            'label': human,
+            'sis_code': sis_code,
+            'course_prefix': f"{sis_code}-",
+            'path': term_path,
+        })
+
+    # Sort descending by sis_code (most recent first)
+    out.sort(key=lambda x: x['sis_code'], reverse=True)
+    return out
+
+
+@app.route('/api/rosters/terms')
+def api_roster_terms():
+    return jsonify(_list_terms_with_changes())
+
+
+def _read_csv_dicts(path):
+    """Tolerant CSV reader: returns list of dicts with lowercase, stripped keys/values.
+    Tries utf-8-sig first, falls back to latin-1.
+    """
+    import csv as _csv
+    rows = []
+    if not path or not os.path.exists(path):
+        return rows
+    for enc in ('utf-8-sig', 'utf-8', 'latin-1'):
+        try:
+            with open(path, 'r', encoding=enc, newline='') as f:
+                rdr = _csv.DictReader(f)
+                for r in rdr or []:
+                    norm = {}
+                    for k, v in (r.items() if r else []):
+                        nk = (k.strip().lower() if isinstance(k, str) else k)
+                        if isinstance(v, str):
+                            v = v.strip()
+                        norm[nk] = v
+                    if norm:
+                        rows.append(norm)
+            break
+        except Exception:
+            rows = []
+            continue
+    return rows
+
+
+def _latest_snapshot_file(term, prefix):
+    base = os.path.join('cache', 'rosters', term)
+    if not os.path.isdir(base):
+        return None
+    try:
+        files = [f for f in os.listdir(base) if f.startswith(prefix + '.') and f.endswith('.csv')]
+        def ts_of(name):
+            label = name[len(prefix)+1:-4]
+            try:
+                return datetime.strptime(label, '%Y-%m-%dT%H-%M')
+            except Exception:
+                return datetime.min
+        files.sort(key=ts_of)
+        if not files:
+            return None
+        return os.path.join(base, files[-1])
+    except Exception:
+        return None
+
+
+@app.route('/api/rosters/users')
+def api_roster_users():
+    """Return latest users list for the given term (from users.*.csv) with optional remote flags from login.*.csv."""
+    term = _resolve_term(request.args)
+    if not term:
+        return jsonify({'error': 'missing term'}), 400
+    term_path = os.path.join('cache', 'rosters', term)
+    users_path = _latest_snapshot_file(term, 'users')
+    if not users_path or not os.path.exists(users_path):
+        return jsonify([])
+    users = []
+    try:
+        for r in _read_csv_dicts(users_path):
+            users.append({
+                'user_id': r.get('user_id',''),
+                'login_id': r.get('login_id',''),
+                'first_name': r.get('first_name',''),
+                'last_name': r.get('last_name',''),
+                'email': r.get('email',''),
+            })
+    except Exception as e:
+        return jsonify({'error': str(e)}), 500
+
+    # Attach remote info from login snapshots if present
+    try:
+        rem = {}
+        files = [f for f in os.listdir(term_path) if f.startswith('login.') and f.endswith('.csv')]
+        def key_fn(name):
+            label = name[len('login.'):-4]
+            try:
+                return datetime.strptime(label, '%Y-%m-%dT%H-%M')
+            except Exception:
+                return datetime.min
+        files.sort(key=key_fn)
+        for fname in files:
+            for r in _read_csv_dicts(os.path.join(term_path, fname)):
+                uid = r.get('user_id')
+                if uid:
+                    rem[str(uid)] = r.get('root_account','') or 'remote'
+        if rem:
+            for u in users:
+                if u['user_id'] in rem:
+                    u['remote'] = True
+                    u['root_account'] = rem[u['user_id']]
+    except Exception:
+        pass
+
+    return jsonify(users)
+
+
+@app.route('/api/rosters/courses')
+def api_roster_courses():
+    """Return latest courses list for the given term (from courses.*.csv)."""
+    term = _resolve_term(request.args)
+    if not term:
+        return jsonify({'error': 'missing term'}), 400
+    courses_path = _latest_snapshot_file(term, 'courses')
+    if not courses_path or not os.path.exists(courses_path):
+        return jsonify([])
+    rows = []
+    try:
+        for r in _read_csv_dicts(courses_path):
+            rows.append({
+                'course_id': r.get('course_id',''),
+                'short_name': r.get('short_name',''),
+                'long_name': r.get('long_name',''),
+                'term_id': r.get('term_id',''),
+            })
+    except Exception as e:
+        return jsonify({'error': str(e)}), 500
+    return jsonify(rows)
+
+
+# Serve enrollment change data and optional filtered views by user_id or course_id.
+@app.route('/api/rosters/changes')
+def api_roster_changes():
+    """Return enrollment change data; supports optional filters 'user_id' or 'course_id'.
+    Query params: term=2025fall (or year=2025&sem=fall), user_id=..., course_id=...
+    """
+    term = _resolve_term(request.args)
+    if not term:
+        return jsonify({'error': 'missing term; supply term=YYYY<sem> or year and sem'}), 400
+    data = _load_enrollment_changes(term)
+    if data is None:
+        return jsonify({'error': f'no enrollment_changes.json for term {term}'}), 404
+
+    uid = request.args.get('user_id')
+    cid = request.args.get('course_id')
+    if uid:
+        events = data.get('by_user', {}).get(str(uid), [])
+        return jsonify({'term': term, 'user_id': str(uid), 'events': events})
+    if cid:
+        events = data.get('by_course', {}).get(str(cid), [])
+        return jsonify({'term': term, 'course_id': str(cid), 'events': events})
+    # No filter: return summary keys only
+    return jsonify({
+        'term': term,
+        'generated': data.get('generated'),
+        'by_course_keys': sorted(list(data.get('by_course', {}).keys())),
+        'by_user_keys': sorted(list(data.get('by_user', {}).keys())),
+    })
+
+
+# Serve events for a given user_id within a term.
+@app.route('/api/rosters/changes/user/<user_id>')
+def api_roster_changes_by_user(user_id):
+    """Get enrollment/presence events for a specific user_id for the given term."""
+    term = _resolve_term(request.args)
+    if not term:
+        return jsonify({'error': 'missing term; supply term=YYYY<sem> or year and sem'}), 400
+    data = _load_enrollment_changes(term)
+    if data is None:
+        return jsonify({'error': f'no enrollment_changes.json for term {term}'}), 404
+    events = data.get('by_user', {}).get(str(user_id), [])
+    return jsonify({'term': term, 'user_id': str(user_id), 'events': events})
+
+
+# Serve events for a given course_id within a term.
+@app.route('/api/rosters/changes/course/<course_id>')
+def api_roster_changes_by_course(course_id):
+    """Get enrollment/presence events for a specific course_id (CRN-like) for the given term."""
+    term = _resolve_term(request.args)
+    if not term:
+        return jsonify({'error': 'missing term; supply term=YYYY<sem> or year and sem'}), 400
+    data = _load_enrollment_changes(term)
+    if data is None:
+        return jsonify({'error': f'no enrollment_changes.json for term {term}'}), 404
+    events = data.get('by_course', {}).get(str(course_id), [])
+    return jsonify({'term': term, 'course_id': str(course_id), 'events': events})
+
+
 if __name__ == '__main__':
     host = os.environ.get('HOST', '0.0.0.0')
     port = int(os.environ.get('PORT', '5000'))

util.py

@@ -17,19 +17,26 @@ def _ensure_parent_dir(path):
         # Never block the open call due to directory check errors
         pass
 
-def _open_with_dirs(file, mode='r', *args, **kwargs):
-    try:
-        if isinstance(file, (str, bytes, os.PathLike)) and any(m in mode for m in ('w','a','x','+')):
-            _ensure_parent_dir(file)
-    finally:
-        return _orig_open(file, mode, *args, **kwargs)
+def _open_with_dirs(file, mode='r', *args, **kwargs):
+    try:
+        if isinstance(file, (str, bytes, os.PathLike)) and any(m in mode for m in ('w','a','x','+')):
+            _ensure_parent_dir(file)
+    finally:
+        # Avoid RuntimeWarning: line buffering (buffering=1) isn't supported in binary mode
+        if 'b' in mode and kwargs.get('buffering', None) == 1:
+            kwargs = dict(kwargs)
+            kwargs['buffering'] = -1  # use default buffering for binary
+        return _orig_open(file, mode, *args, **kwargs)
 
-def _codecs_open_with_dirs(filename, mode='r', encoding=None, errors='strict', buffering=1):
-    try:
-        if isinstance(filename, (str, bytes, os.PathLike)) and any(m in mode for m in ('w','a','x','+')):
-            _ensure_parent_dir(filename)
-    finally:
-        return _orig_codecs_open(filename, mode, encoding, errors, buffering)
+def _codecs_open_with_dirs(filename, mode='r', encoding=None, errors='strict', buffering=1):
+    try:
+        if isinstance(filename, (str, bytes, os.PathLike)) and any(m in mode for m in ('w','a','x','+')):
+            _ensure_parent_dir(filename)
+    finally:
+        # Avoid line-buffering with binary modes
+        if 'b' in mode and buffering == 1:
+            buffering = -1
+        return _orig_codecs_open(filename, mode, encoding, errors, buffering)
 
 # Apply patches once
 _builtins.open = _open_with_dirs