troggle/core/views/scans.py

import datetime
from pathlib import Path
from urllib.parse import unquote as urlunquote

from django.conf import settings
from django.http import HttpResponse
from django.shortcuts import render

from troggle.core.models.caves import GetCaveLookup
from troggle.core.models.survex import SingleScan, SurvexBlock, SurvexPersonRole
from troggle.core.models.wallets import Wallet
from troggle.core.models.troggle import DataIssue, Expedition, Person, PersonExpedition
from troggle.core.views.expo import getmimetype
from troggle.parsers.caves import add_cave_to_pending_list
from troggle.parsers.people import GetPersonExpeditionNameLookup
from troggle.parsers.survex import set_walletdate


"""one of these views serves files as binary blobs, and simply set the mime type based on the file extension,
as does the urls.py dispatcher which sends them here. Here they should actually have the filetype checked 
by looking inside the file before being served.

need to check if inavlid query string is invalid, or produces multiple replies
and render a user-friendly error page.

Note that caveifywallet() etc do NOT save the object to the db. They are ephemeral, just for the page rendering of the
manywallets dict.

TODO 
cave for a wallet - just gets the last one, randomly. SHould make this a list or many:many ideally

add this file in to the todo list thinggy.
"""


def populatewallet(w):
    """Copy survex data here just for display, not permanently

    Only gets data from the survex file when it was parsed on import, or edited (& thus parsed) online,
    so doesn't work if there was no *ref value
    """
    slugpeople = []
    blocks = SurvexBlock.objects.filter(scanswallet=w)
    for b in blocks:
        for personrole in b.survexpersonrole_set.all():
            slugpeople.append(personrole.person) # Person objects, not the names anymore
        w.slugpeople = list(set(slugpeople)) 


def caveifywallet(w):
    """Gets the cave from the list of survex files,
    only selects one of them though. Only used for display.
    FIX THIS to display many caves
    """
    # print(f' - Caveify {w=}')
    blocknames = []
    blocks = SurvexBlock.objects.filter(scanswallet=w)
    for b in blocks:
        # NB b.cave is not populated by parser. Use b.survexfile.cave instead, or we could parse b.survexpath
        if b.survexfile.cave:
            w.caveobj = (
                b.survexfile.cave
            )  # just gets the last one, randomly. SHould make this a list or many:many ideally
            w.cave = w.caveobj
        if b.name:
            blocknames.append(b.name)

    if w.name():
        w.displaynames = [w.name()]
    else:
        w.displaynames = blocknames


def fillblankpeople(w):
    """Find people  attached to a wallet via the survex files
    if no one explicitly attached.
    the JSON string which may OR MAY NOT be formatted as a list.
    
    w.slugpeople is set only if there is no explicit string of people's name in the wallet
    w.persons is set only if there is an explicit list of peoples' names in the wallet
    The template choses which to display depending on whether w.slugpeople exists or not.
    """
    def nobody(wplist):
        if len(wplist) > 1:
            return False
            
        nobod = wp[0].lower()
        if nobod == "unknown" or nobod == "nobody" or nobod == " " or nobod == "":
            return True
        else:
            return False
    
    wp = w.people() # just a list of names as strings, direct from JSON. Replace with list of Person objects in parser?
    if not isinstance(wp, list): # might be None 
        print(f"{w} NOT A LIST {type(wp)}: {wp}")
        populatewallet(w)
        return
   
    if not wp: # e.g. empty list
        # print(f"{w} {wp=}")
        populatewallet(w) # sets w.slugpeople
        return
    
    
    if nobody(wp):
        populatewallet(w) # sets w.slugpeople
    else:
        w.persons = wp
    return

def is_cave(wallet, id):
    if not id:
        return False
    Gcavelookup = GetCaveLookup()
    id = id.strip("' []'")
    if id in Gcavelookup:
        return True
    else:
        # Historic wallets used just 2 or 3 digits and were all 1623 area. So, just for these wallets, 
        # assume it is 1623-xxx
        if f"1623-{id}" in Gcavelookup:
            print(f" - Should modify wallet {wallet} to use 1623- prefix for cave <{id}>")
            Gcavelookup[id] = Gcavelookup[f"1623-{id}"] # restoring an ambiguous alias, BAD idea.
            return True
        else:
            print(f" - Wallet {wallet} Failed to find cave object from id <{id}>")
            if id.lower() != "unknown" and id != "":
                print(f" - adding <{id}> to pendingcaves DataIssues")
                add_cave_to_pending_list(id, wallet, f"Wallet {wallet} - Could not find id <{id}>")
            return False

def fillblankothers(w):
    """This is on the way to having a many:many relationship between Caves and Wallets
    """
    if not w.walletdate:
        set_walletdate(w)

    Gcavelookup = GetCaveLookup()

    wcaveid = w.cave()
    if not wcaveid or wcaveid == "":
        caveifywallet(w)
    else:
        if type(wcaveid) == list:
            for i in wcaveid:
                i = i.strip("' []'")
                if is_cave(w,i):
                    w.caveobj = Gcavelookup[i] # just sets it to the last one found. nasty. bug waiting to happen
        elif wcaveid.find(',') != -1:
            # it's a list of cave ids as a string
            ids = wcaveid.split(',')
            for i in ids:
                i = i.strip("' []'")
                if is_cave(w,i):
                    w.caveobj = Gcavelookup[i]  # just sets it to the last one found. nasty. bug waiting to happen     
        else:
            if is_cave(w,wcaveid):
                w.caveobj = Gcavelookup[wcaveid.strip("' []'")]
   
                


def fixsurvextick(w, ticks):
    ticks["S"] = w.fixsurvextick(ticks["S"])


def walletslistperson(request, slug):
    """Page which displays a list of all the wallets for a specific person
    HORRIBLE linear search through everything. Index and do SQL query properly
    Currently ONLY getting wallets with survex files attached, not free-text searching the wallet.people list
    """
    # GetPersonExpeditionNameLookup
    
    # Remember that 'personexpedition__expedition' is interpreted by Django to mean the
    # 'expedition' object which is connected by a foreign key to the 'personexpedition'
    # object, which is a field of the PersonLogEntry object:
    # PersonLogEntry.objects.filter(personexpedition__expedition=expo)

    def personwallet(p):
        manywallets = set()
        
        sps = SurvexPersonRole.objects.filter(person=p)
        for sp in sps:
            w = sp.survexblock.scanswallet
            if w:
                 manywallets.add(w)
        
        pes = PersonExpedition.objects.filter(person=p)
        for person_expo in pes:
            expo = person_expo.expedition
            year = expo.year
        
            wallets = Wallet.objects.filter(walletyear__year=year)
            for w in wallets:
                if w in manywallets: # already seen it
                    continue
                w.persons = w.people()  # ephemeral attribute 'persons' for web page
                crew = GetPersonExpeditionNameLookup(expo)
                for n in w.persons:
                    if n.lower() in crew:
                        if crew[n.lower()] == person_expo:
                            manywallets.add(w)
                            # print(f"{w} Found a non-survex wallet for {person_expo}")
                    else:
                        nobod = n.lower()
                        if nobod == "unknown" or nobod == "nobody" or nobod == " " or nobod == "":
                            pass
                        else:
                            wurl = f"/walletedit/{w.walletname.replace('#',':')}"
                            message = f"{w} name '{n}' NOT found with GetPersonExpeditionNameLookup on {year} ?!"
                            print(message)
                            DataIssue.objects.update_or_create(parser="scans", message=message, url=wurl)
                         
        for w in manywallets:
            fillblankpeople(w)
            fillblankothers(w)
            w.ticks = w.get_ticks()  # the complaints in colour form
            fixsurvextick(w, w.ticks)
        return manywallets

    # print("-walletslistperson")
    p = Person.objects.get(slug=slug)
   
    manywallets = personwallet(p)
    expeditions = Expedition.objects.all()
    print("--")
    return render(
        request,
        "personwallets.html",
        {"manywallets": manywallets, "settings": settings, "person": p, "expeditions": expeditions},
    )


def setwalletsdates():
    """This sets all the undated wallets, but they should already all be dated on
    import or on edit"""
    wallets = Wallet.objects.filter(walletdate=None)
    print(f"undated wallets: {len(wallets)}")
    for w in wallets:
        w.walletdate = w.date()
        w.save()


def walletslistyear(request, year):
    """Page which displays a list of all the wallets in a specific year.
    We have a field .walletyear, which we set on import.
    """

    def ticksyearwallet(year):
        manywallets = []
        wallets = Wallet.objects.filter(walletyear__year=year)
        for w in wallets:
            manywallets.append(w)
            fillblankpeople(w)
            fillblankothers(w)
            w.ticks = w.get_ticks()  # the complaints in colour form, from the json file on disc
            fixsurvextick(w, w.ticks)

        return manywallets

    # print("-walletslistyear")
    if year < 1976 or year > 2050:
        return render(request, "errors/generic.html", {"message": "Year out of range. Must be between 1976 and 2050"})

    # return render(request, 'errors/generic.html', {'message': 'This page logic not implemented yet'})

    year = str(year)
    manywallets = ticksyearwallet(year)
    expeditions = Expedition.objects.all() #bad Django style
    expedition = expeditions.filter(year=year)
    length_ug = 0.0
    for w in manywallets:
        for sb in w.survexblock_set.all():
            length_ug += sb.legslength
    print("--")
    return render(
        request,
        "yearwallets.html",
        {
            "manywallets": manywallets,
            "settings": settings,
            "year": year,
            "expeditions": expeditions,
            "expedition": expedition,
            "length_ug": length_ug,
        },
    )


def cavewallets(request, caveid):
    """Returns all the wallets for just one cave"""
    print("-cavewallets")

    Gcavelookup = GetCaveLookup()
    if caveid in Gcavelookup:
        cave = Gcavelookup[caveid]
    else:
        return render(request, "errors/badslug.html", {"badslug": f"{caveid} - from cavewallets()"})

    # remove duplication. Sorting is done in the template
    # But this only gets wallets which have survex files attached..
    wallets = set(Wallet.objects.filter(survexblock__survexfile__cave=cave))

    # all the ones without a survexblock attached via a *ref, search for match in JSON
    zilchwallets = set(Wallet.objects.exclude(survexblock__survexfile__cave=cave))
    for z in zilchwallets:
        zcaveid = z.cave()
        if zcaveid:
            cleanid = str(zcaveid).strip("' []'")
 
            if cleanid.find(',') != -1:
                # it's a list of cave ids
                wurl = f"/walletedit/{z.walletname.replace('#',':')}"
                message = f" ! In {z.walletname}  cavewallets, we do not handle lists of cave ids yet '{cleanid}'"
                print(message)
                DataIssue.objects.update_or_create(parser="scans", message=message, url=wurl)
                
                # it's a list of cave ids as a string. Identify any orphan caves hidden here
                ids = cleanid.split(',')
                for i in ids:
                    i = i.strip("' []'")
                    if is_cave(z,i):
                        fcave = Gcavelookup[i.strip("' []'")]  # just sets it to the last one found. nasty. bug waiting to happen 
                
            elif cleanid in Gcavelookup:
                fcave = Gcavelookup[cleanid]
                if str(fcave.slug()) == caveid:
                    # print(f' - Found one ! {z.walletname=} {zcaveid=}')
                    wallets.add(z)
            elif f"1623-{cleanid}" in Gcavelookup: # special hack for all the old wallets which are 1623
                fcave = Gcavelookup[f"1623-{cleanid}"]
                if str(fcave.slug()) == caveid:
                    # print(f' - Found one ! {z.walletname=} {zcaveid=}')
                    wallets.add(z)
            elif cleanid in ['surface', 'unknown', '']:
                message = f" ! In {z.walletname} cavewallets, ignoring '{cleanid}' as not a cave"
                print(message)
                pass
            else:
                wurl = f"/walletedit/{z.walletname.replace('#',':')}"
                message = f" ! In {z.walletname} cavewallets, there is an unrecognised cave name '{cleanid}', adding to pending list."
                print(message)
                DataIssue.objects.update_or_create(parser="scans", message=message, url=wurl)
                add_cave_to_pending_list(cleanid, z, f"an unrecognised cave name in {z.walletname}") 

    manywallets = list(set(wallets))
    for w in manywallets:
        fillblankpeople(w)
        fillblankothers(w)
        w.ticks = w.get_ticks()  # the complaints in colour form, from the json file on disc
        fixsurvextick(w, w.ticks)
    expeditions = Expedition.objects.all()
    print("--")
    return render(
        request,
        "cavewallets.html",
        {"manywallets": manywallets, "settings": settings, "cave": cave, "expeditions": expeditions},
    )


def oldwallet(request, path):
    """Now called only for non-standard wallet structures for pre-2000 wallets"""
    # print([ s.walletname  for s in Wallet.objects.all() ])
    print(f"! - oldwallet path:{path}")
    try:
        wallet = Wallet.objects.get(walletname=urlunquote(path))
        return render(request, "wallet_old.html", {"wallet": wallet, "settings": settings})
    except:
        message = f"Scan folder error or not found '{path}' ."
        return render(request, "errors/generic.html", {"message": message})


def scansingle(request, path, file):
    """sends a single binary file to the user for display - browser decides how using mimetype
    This is very unsafe"""
    try:
        wallet = Wallet.objects.get(walletname=urlunquote(path))
        singlescan = SingleScan.objects.get(wallet=wallet, name=file)
        imagefile = Path(singlescan.ffile, file)
        if imagefile.is_file():
            message = f" - scansingle {imagefile}  {path}:{file}:{getmimetype(file)}:"
            print(message)
            return HttpResponse(content=open(imagefile, "rb"), content_type=getmimetype(file))  # any type of image
        else:
            message = f"Scan folder file  '{imagefile}' not found. {path=} {file=}"
            print(message)
            return render(request, "errors/generic.html", {"message": message})

    except:
        message = f"Scan folder or scan item access error '{path}'  and '{file}'."
        return render(request, "errors/generic.html", {"message": message})


def allscans(request):
    """Returns all the wallets in the system, we would like to use
    the Django queryset SQL optimisation https://docs.djangoproject.com/en/dev/ref/models/querysets/#prefetch-related
    to get the related singlescan and survexblock objects but that requires rewriting this to do the query on those, not on
    the wallets
    """
    manywallets = Wallet.objects.all()  # NB all of them
    # manywallets = Wallet.objects.all().prefetch_related('singlescan') fails as the link is defined on 'singlescan' not on 'wallet'
    expeditions = Expedition.objects.all()
    return render(
        request, "manywallets.html", {"manywallets": manywallets, "settings": settings, "expeditions": expeditions}
    )